<?php

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/**

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* These functions are needed to load WordPress.

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*

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* @package WordPress

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*/

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/**

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* Returns the HTTP protocol sent by the server.

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*

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* @since 4.4.0

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*

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* @return string The HTTP protocol. Default: HTTP/1.0.

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*/

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function wp_get_server_protocol() {

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$protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : '';

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if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0', 'HTTP/3' ), true ) ) {

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$protocol = 'HTTP/1.0';

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}

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return $protocol;

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}

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/**

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* Fixes `$_SERVER` variables for various setups.

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*

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* @since 3.0.0

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* @access private

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*

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* @global string $PHP_SELF The filename of the currently executing script,

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* relative to the document root.

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*/

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function wp_fix_server_vars() {

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global $PHP_SELF;

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$default_server_values = array(

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'SERVER_SOFTWARE' => '',

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'REQUEST_URI' => '',

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);

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$_SERVER = array_merge( $default_server_values, $_SERVER );

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// Fix for IIS when running with PHP ISAPI.

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if ( empty( $_SERVER['REQUEST_URI'] )

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|| ( 'cgi-fcgi' !== PHP_SAPI && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) )

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) {

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if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {

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// IIS Mod-Rewrite.

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$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];

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} elseif ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {

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// IIS Isapi_Rewrite.

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$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];

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} else {

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// Use ORIG_PATH_INFO if there is no PATH_INFO.

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if ( ! isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) ) {

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$_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];

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}

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// Some IIS + PHP configurations put the script-name in the path-info (no need to append it twice).

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if ( isset( $_SERVER['PATH_INFO'] ) ) {

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if ( $_SERVER['PATH_INFO'] === $_SERVER['SCRIPT_NAME'] ) {

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$_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];

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} else {

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$_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];

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}

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}

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// Append the query string if it exists and isn't null.

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if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {

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$_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];

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}

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}

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}

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// Fix for PHP as CGI hosts that set SCRIPT_FILENAME to something ending in php.cgi for all requests.

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if ( isset( $_SERVER['SCRIPT_FILENAME'] ) && str_ends_with( $_SERVER['SCRIPT_FILENAME'], 'php.cgi' ) ) {

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$_SERVER['SCRIPT_FILENAME'] = $_SERVER['PATH_TRANSLATED'];

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}

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// Fix for Dreamhost and other PHP as CGI hosts.

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if ( isset( $_SERVER['SCRIPT_NAME'] ) && str_contains( $_SERVER['SCRIPT_NAME'], 'php.cgi' ) ) {

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unset( $_SERVER['PATH_INFO'] );

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}

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// Fix empty PHP_SELF.

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$PHP_SELF = $_SERVER['PHP_SELF'];

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if ( empty( $PHP_SELF ) ) {

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$_SERVER['PHP_SELF'] = preg_replace( '/(\?.*)?$/', '', $_SERVER['REQUEST_URI'] );

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$PHP_SELF = $_SERVER['PHP_SELF'];

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}

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wp_populate_basic_auth_from_authorization_header();

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}

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/**

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* Populates the Basic Auth server details from the Authorization header.

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*

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* Some servers running in CGI or FastCGI mode don't pass the Authorization

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* header on to WordPress. If it's been rewritten to the `HTTP_AUTHORIZATION` header,

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* fill in the proper $_SERVER variables instead.

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*

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* @since 5.6.0

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*/

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function wp_populate_basic_auth_from_authorization_header() {

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// If we don't have anything to pull from, return early.

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if ( ! isset( $_SERVER['HTTP_AUTHORIZATION'] ) && ! isset( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] ) ) {

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return;

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}

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// If either PHP_AUTH key is already set, do nothing.

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if ( isset( $_SERVER['PHP_AUTH_USER'] ) || isset( $_SERVER['PHP_AUTH_PW'] ) ) {

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return;

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}

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// From our prior conditional, one of these must be set.

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$header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];

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// Test to make sure the pattern matches expected.

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if ( ! preg_match( '%^Basic [a-z\d/+]*={0,2}$%i', $header ) ) {

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return;

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}

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// Removing `Basic ` the token would start six characters in.

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$token = substr( $header, 6 );

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$userpass = base64_decode( $token );

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// There must be at least one colon in the string.

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if ( ! str_contains( $userpass, ':' ) ) {

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return;

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}

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list( $user, $pass ) = explode( ':', $userpass, 2 );

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// Now shove them in the proper keys where we're expecting later on.

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$_SERVER['PHP_AUTH_USER'] = $user;

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$_SERVER['PHP_AUTH_PW'] = $pass;

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}

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/**

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* Checks the server requirements.

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*

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* - PHP version

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* - PHP extensions

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* - MySQL or MariaDB version (unless a database drop-in is present)

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*

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* Dies if requirements are not met.

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*

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* @since 3.0.0

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* @access private

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*

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* @global string $required_php_version The minimum required PHP version string.

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* @global string[] $required_php_extensions The names of required PHP extensions.

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* @global string $wp_version The WordPress version string.

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*/

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function wp_check_php_mysql_versions() {

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global $required_php_version, $required_php_extensions, $wp_version;

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$php_version = PHP_VERSION;

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if ( version_compare( $required_php_version, $php_version, '>' ) ) {

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$protocol = wp_get_server_protocol();

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header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );

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header( 'Content-Type: text/html; charset=utf-8' );

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printf(

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'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.',

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$php_version,

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$wp_version,

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$required_php_version

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);

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exit( 1 );

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}

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$missing_extensions = array();

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if ( isset( $required_php_extensions ) && is_array( $required_php_extensions ) ) {

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foreach ( $required_php_extensions as $extension ) {

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if ( extension_loaded( $extension ) ) {

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continue;

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}

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$missing_extensions[] = sprintf(

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'WordPress %1$s requires the <code>%2$s</code> PHP extension.',

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$wp_version,

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$extension

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);

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}

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}

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if ( count( $missing_extensions ) > 0 ) {

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$protocol = wp_get_server_protocol();

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header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );

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header( 'Content-Type: text/html; charset=utf-8' );

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echo implode( '<br>', $missing_extensions );

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exit( 1 );

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}

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// This runs before default constants are defined, so we can't assume WP_CONTENT_DIR is set yet.

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$wp_content_dir = defined( 'WP_CONTENT_DIR' ) ? WP_CONTENT_DIR : ABSPATH . 'wp-content';

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if ( ! function_exists( 'mysqli_connect' )

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&& ! file_exists( $wp_content_dir . '/db.php' )

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) {

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require_once ABSPATH . WPINC . '/functions.php';

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wp_load_translations_early();

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$message = '<p>' . __( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ) . "</p>\n";

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$message .= '<p>' . sprintf(

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/* translators: %s: mysqli. */

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__( 'Please check that the %s PHP extension is installed and enabled.' ),

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'<code>mysqli</code>'

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) . "</p>\n";

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$message .= '<p>' . sprintf(

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/* translators: %s: Support forums URL. */

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__( 'If you are unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href="%s">WordPress support forums</a>.' ),

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__( 'https://wordpress.org/support/forums/' )

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) . "</p>\n";

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$args = array(

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'exit' => false,

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'code' => 'mysql_not_found',

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);

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wp_die(

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$message,

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__( 'Requirements Not Met' ),

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$args

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);

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exit( 1 );

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}

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}

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/**

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* Retrieves the current environment type.

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*

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* The type can be set via the `WP_ENVIRONMENT_TYPE` global system variable,

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* or a constant of the same name.

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*

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* Possible values are 'local', 'development', 'staging', and 'production'.

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* If not set, the type defaults to 'production'.

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*

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* @since 5.5.0

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* @since 5.5.1 Added the 'local' type.

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* @since 5.5.1 Removed the ability to alter the list of types.

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*

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* @return string The current environment type.

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*/

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function wp_get_environment_type() {

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static $current_env = '';

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if ( ! defined( 'WP_RUN_CORE_TESTS' ) && $current_env ) {

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return $current_env;

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}

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$wp_environments = array(

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'local',

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'development',

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'staging',

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'production',

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);

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// Add a note about the deprecated WP_ENVIRONMENT_TYPES constant.

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if ( defined( 'WP_ENVIRONMENT_TYPES' ) && function_exists( '_deprecated_argument' ) ) {

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if ( function_exists( '__' ) ) {

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/* translators: %s: WP_ENVIRONMENT_TYPES */

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$message = sprintf( __( 'The %s constant is no longer supported.' ), 'WP_ENVIRONMENT_TYPES' );

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} else {

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$message = sprintf( 'The %s constant is no longer supported.', 'WP_ENVIRONMENT_TYPES' );

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}

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_deprecated_argument(

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'define()',

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'5.5.1',

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$message

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);

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}

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// Check if the environment variable has been set, if `getenv` is available on the system.

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if ( function_exists( 'getenv' ) ) {

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$has_env = getenv( 'WP_ENVIRONMENT_TYPE' );

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if ( false !== $has_env ) {

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$current_env = $has_env;

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}

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}

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// Fetch the environment from a constant, this overrides the global system variable.

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if ( defined( 'WP_ENVIRONMENT_TYPE' ) && WP_ENVIRONMENT_TYPE ) {

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$current_env = WP_ENVIRONMENT_TYPE;

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}

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// Make sure the environment is an allowed one, and not accidentally set to an invalid value.

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if ( ! in_array( $current_env, $wp_environments, true ) ) {

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$current_env = 'production';

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}

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return $current_env;

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}

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/**

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* Retrieves the current development mode.

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*

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* The development mode affects how certain parts of the WordPress application behave,

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* which is relevant when developing for WordPress.

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*

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* Development mode can be set via the `WP_DEVELOPMENT_MODE` constant in `wp-config.php`.

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* Possible values are 'core', 'plugin', 'theme', 'all', or an empty string to disable

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* development mode. 'all' is a special value to signify that all three development modes

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* ('core', 'plugin', and 'theme') are enabled.

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*

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* Development mode is considered separately from `WP_DEBUG` and wp_get_environment_type().

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* It does not affect debugging output, but rather functional nuances in WordPress.

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*

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* This function retrieves the currently set development mode value. To check whether

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* a specific development mode is enabled, use wp_is_development_mode().

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*

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* @since 6.3.0

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*

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* @return string The current development mode.

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*/

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function wp_get_development_mode() {

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static $current_mode = null;

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if ( ! defined( 'WP_RUN_CORE_TESTS' ) && null !== $current_mode ) {

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return $current_mode;

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}

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$development_mode = WP_DEVELOPMENT_MODE;

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// Exclusively for core tests, rely on the `$_wp_tests_development_mode` global.

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if ( defined( 'WP_RUN_CORE_TESTS' ) && isset( $GLOBALS['_wp_tests_development_mode'] ) ) {

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$development_mode = $GLOBALS['_wp_tests_development_mode'];

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}

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$valid_modes = array(

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'core',

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'plugin',

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'theme',

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'all',

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'',

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);

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if ( ! in_array( $development_mode, $valid_modes, true ) ) {

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$development_mode = '';

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}

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$current_mode = $development_mode;

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return $current_mode;

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}

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/**

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* Checks whether the site is in the given development mode.

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*

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* @since 6.3.0

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*

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* @param string $mode Development mode to check for. Either 'core', 'plugin', 'theme', or 'all'.

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* @return bool True if the given mode is covered by the current development mode, false otherwise.

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*/

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function wp_is_development_mode( $mode ) {

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$current_mode = wp_get_development_mode();

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if ( empty( $current_mode ) ) {

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return false;

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}

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// Return true if the current mode encompasses all modes.

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if ( 'all' === $current_mode ) {

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return true;

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}

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// Return true if the current mode is the given mode.

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return $mode === $current_mode;

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}

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/**

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* Ensures all of WordPress is not loaded when handling a favicon.ico request.

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*

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* Instead, send the headers for a zero-length favicon and bail.

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*

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* @since 3.0.0

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* @deprecated 5.4.0 Deprecated in favor of do_favicon().

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*/

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function wp_favicon_request() {

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if ( '/favicon.ico' === $_SERVER['REQUEST_URI'] ) {

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header( 'Content-Type: image/vnd.microsoft.icon' );

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exit;

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}

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}

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/**

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* Dies with a maintenance message when conditions are met.

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*

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* The default message can be replaced by using a drop-in (maintenance.php in

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* the wp-content directory).

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*

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* @since 3.0.0

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* @access private

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*/

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function wp_maintenance() {

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// Return if maintenance mode is disabled.

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if ( ! wp_is_maintenance_mode() ) {

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return;

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}

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if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {

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require_once WP_CONTENT_DIR . '/maintenance.php';

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die();

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}

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require_once ABSPATH . WPINC . '/functions.php';

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wp_load_translations_early();

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header( 'Retry-After: 600' );

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wp_die(

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__( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ),

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__( 'Maintenance' ),

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503

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);

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}

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/**

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* Checks if maintenance mode is enabled.

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*

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* Checks for a file in the WordPress root directory named ".maintenance".

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* This file will contain the variable $upgrading, set to the time the file

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* was created. If the file was created less than 10 minutes ago, WordPress

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* is in maintenance mode.

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*

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* @since 5.5.0

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*

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* @global int $upgrading The Unix timestamp marking when upgrading WordPress began.

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*

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* @return bool True if maintenance mode is enabled, false otherwise.

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*/

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function wp_is_maintenance_mode() {

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global $upgrading;

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if ( ! file_exists( ABSPATH . '.maintenance' ) || wp_installing() ) {

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return false;

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}

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require ABSPATH . '.maintenance';

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// If the $upgrading timestamp is older than 10 minutes, consider maintenance over.

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if ( ( time() - $upgrading ) >= 10 * MINUTE_IN_SECONDS ) {

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return false;

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}

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// Don't enable maintenance mode while scraping for fatal errors.

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if ( is_int( $upgrading ) && isset( $_REQUEST['wp_scrape_key'], $_REQUEST['wp_scrape_nonce'] ) ) {

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$key = stripslashes( $_REQUEST['wp_scrape_key'] );

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$nonce = stripslashes( $_REQUEST['wp_scrape_nonce'] );

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if ( md5( $upgrading ) === $key && (int) $nonce === $upgrading ) {

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return false;

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}

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}

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/**

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* Filters whether to enable maintenance mode.

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*

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* This filter runs before it can be used by plugins. It is designed for

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* non-web runtimes. If this filter returns true, maintenance mode will be

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* active and the request will end. If false, the request will be allowed to

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* continue processing even if maintenance mode should be active.

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*

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* @since 4.6.0

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*

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* @param bool $enable_checks Whether to enable maintenance mode. Default true.

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* @param int $upgrading The timestamp set in the .maintenance file.

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*/

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if ( ! apply_filters( 'enable_maintenance_mode', true, $upgrading ) ) {

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return false;

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}

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return true;

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}

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/**

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* Gets the time elapsed so far during this PHP script.

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*

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* @since 5.8.0

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*

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* @return float Seconds since the PHP script started.

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*/

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function timer_float() {

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return microtime( true ) - $_SERVER['REQUEST_TIME_FLOAT'];

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}

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/**

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* Starts the WordPress micro-timer.

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*

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* @since 0.71

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* @access private

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*

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* @see timer_stop()

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*

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* @global float $timestart Unix timestamp set at the beginning of the page load.

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