<?php

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/**

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* Misc WordPress Administration API.

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*

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* @package WordPress

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* @subpackage Administration

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*/

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/**

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* Returns whether the server is running Apache with the mod_rewrite module loaded.

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*

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* @since 2.0.0

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*

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* @return bool Whether the server is running Apache with the mod_rewrite module loaded.

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*/

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function got_mod_rewrite() {

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$got_rewrite = apache_mod_loaded( 'mod_rewrite', true );

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/**

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* Filters whether Apache and mod_rewrite are present.

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*

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* This filter was previously used to force URL rewriting for other servers,

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* like nginx. Use the {@see 'got_url_rewrite'} filter in got_url_rewrite() instead.

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*

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* @since 2.5.0

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*

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* @see got_url_rewrite()

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*

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* @param bool $got_rewrite Whether Apache and mod_rewrite are present.

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*/

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return apply_filters( 'got_rewrite', $got_rewrite );

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}

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/**

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* Returns whether the server supports URL rewriting.

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*

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* Detects Apache's mod_rewrite, IIS 7.0+ permalink support, and nginx.

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*

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* @since 3.7.0

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*

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* @global bool $is_nginx

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* @global bool $is_caddy

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*

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* @return bool Whether the server supports URL rewriting.

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*/

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function got_url_rewrite() {

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$got_url_rewrite = ( got_mod_rewrite() || $GLOBALS['is_nginx'] || $GLOBALS['is_caddy'] || iis7_supports_permalinks() );

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/**

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* Filters whether URL rewriting is available.

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*

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* @since 3.7.0

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*

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* @param bool $got_url_rewrite Whether URL rewriting is available.

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*/

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return apply_filters( 'got_url_rewrite', $got_url_rewrite );

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}

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/**

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* Extracts strings from between the BEGIN and END markers in the .htaccess file.

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*

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* @since 1.5.0

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*

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* @param string $filename Filename to extract the strings from.

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* @param string $marker The marker to extract the strings from.

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* @return string[] An array of strings from a file (.htaccess) from between BEGIN and END markers.

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*/

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function extract_from_markers( $filename, $marker ) {

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$result = array();

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if ( ! file_exists( $filename ) ) {

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return $result;

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}

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$markerdata = explode( "\n", implode( '', file( $filename ) ) );

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$state = false;

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foreach ( $markerdata as $markerline ) {

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if ( str_contains( $markerline, '# END ' . $marker ) ) {

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$state = false;

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}

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if ( $state ) {

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if ( str_starts_with( $markerline, '#' ) ) {

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continue;

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}

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$result[] = $markerline;

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}

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if ( str_contains( $markerline, '# BEGIN ' . $marker ) ) {

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$state = true;

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}

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}

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return $result;

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}

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/**

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* Inserts an array of strings into a file (.htaccess), placing it between

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* BEGIN and END markers.

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*

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* Replaces existing marked info. Retains surrounding

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* data. Creates file if none exists.

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*

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* @since 1.5.0

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*

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* @param string $filename Filename to alter.

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* @param string $marker The marker to alter.

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* @param array|string $insertion The new content to insert.

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* @return bool True on write success, false on failure.

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*/

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function insert_with_markers( $filename, $marker, $insertion ) {

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if ( ! file_exists( $filename ) ) {

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if ( ! is_writable( dirname( $filename ) ) ) {

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return false;

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}

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if ( ! touch( $filename ) ) {

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return false;

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}

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// Make sure the file is created with a minimum set of permissions.

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$perms = fileperms( $filename );

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if ( $perms ) {

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chmod( $filename, $perms | 0644 );

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}

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} elseif ( ! is_writable( $filename ) ) {

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return false;

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}

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if ( ! is_array( $insertion ) ) {

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$insertion = explode( "\n", $insertion );

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}

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$switched_locale = switch_to_locale( get_locale() );

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$instructions = sprintf(

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/* translators: 1: Marker. */

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__(

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'The directives (lines) between "BEGIN %1$s" and "END %1$s" are

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dynamically generated, and should only be modified via WordPress filters.

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Any changes to the directives between these markers will be overwritten.'

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),

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$marker

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);

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$instructions = explode( "\n", $instructions );

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foreach ( $instructions as $line => $text ) {

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$instructions[ $line ] = '# ' . $text;

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}

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/**

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* Filters the inline instructions inserted before the dynamically generated content.

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*

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* @since 5.3.0

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*

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* @param string[] $instructions Array of lines with inline instructions.

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* @param string $marker The marker being inserted.

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*/

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$instructions = apply_filters( 'insert_with_markers_inline_instructions', $instructions, $marker );

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if ( $switched_locale ) {

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restore_previous_locale();

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}

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$insertion = array_merge( $instructions, $insertion );

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$start_marker = "# BEGIN {$marker}";

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$end_marker = "# END {$marker}";

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$fp = fopen( $filename, 'r+' );

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if ( ! $fp ) {

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return false;

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}

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// Attempt to get a lock. If the filesystem supports locking, this will block until the lock is acquired.

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flock( $fp, LOCK_EX );

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$lines = array();

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while ( ! feof( $fp ) ) {

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$lines[] = rtrim( fgets( $fp ), "\r\n" );

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}

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// Split out the existing file into the preceding lines, and those that appear after the marker.

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$pre_lines = array();

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$post_lines = array();

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$existing_lines = array();

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$found_marker = false;

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$found_end_marker = false;

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foreach ( $lines as $line ) {

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if ( ! $found_marker && str_contains( $line, $start_marker ) ) {

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$found_marker = true;

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continue;

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} elseif ( ! $found_end_marker && str_contains( $line, $end_marker ) ) {

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$found_end_marker = true;

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continue;

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}

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if ( ! $found_marker ) {

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$pre_lines[] = $line;

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} elseif ( $found_end_marker ) {

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$post_lines[] = $line;

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} else {

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$existing_lines[] = $line;

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}

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}

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// Check to see if there was a change.

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if ( $existing_lines === $insertion ) {

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flock( $fp, LOCK_UN );

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fclose( $fp );

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return true;

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}

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// Generate the new file data.

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$new_file_data = implode(

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"\n",

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array_merge(

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$pre_lines,

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array( $start_marker ),

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$insertion,

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array( $end_marker ),

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$post_lines

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)

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);

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// Write to the start of the file, and truncate it to that length.

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fseek( $fp, 0 );

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$bytes = fwrite( $fp, $new_file_data );

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if ( $bytes ) {

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ftruncate( $fp, ftell( $fp ) );

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}

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fflush( $fp );

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flock( $fp, LOCK_UN );

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fclose( $fp );

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return (bool) $bytes;

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}

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/**

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* Updates the htaccess file with the current rules if it is writable.

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*

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* Always writes to the file if it exists and is writable to ensure that we

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* blank out old rules.

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*

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* @since 1.5.0

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*

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* @global WP_Rewrite $wp_rewrite WordPress rewrite component.

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*

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* @return bool|null True on write success, false on failure. Null in multisite.

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*/

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function save_mod_rewrite_rules() {

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global $wp_rewrite;

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if ( is_multisite() ) {

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return null;

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}

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// Ensure get_home_path() is declared.

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require_once ABSPATH . 'wp-admin/includes/file.php';

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$home_path = get_home_path();

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$htaccess_file = $home_path . '.htaccess';

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/*

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* If the file doesn't already exist check for write access to the directory

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* and whether we have some rules. Else check for write access to the file.

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*/

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if ( ! file_exists( $htaccess_file ) && is_writable( $home_path ) && $wp_rewrite->using_mod_rewrite_permalinks()

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|| is_writable( $htaccess_file )

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) {

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if ( got_mod_rewrite() ) {

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$rules = explode( "\n", $wp_rewrite->mod_rewrite_rules() );

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return insert_with_markers( $htaccess_file, 'WordPress', $rules );

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}

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}

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return false;

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}

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/**

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* Updates the IIS web.config file with the current rules if it is writable.

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* If the permalinks do not require rewrite rules then the rules are deleted from the web.config file.

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*

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* @since 2.8.0

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*

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* @global WP_Rewrite $wp_rewrite WordPress rewrite component.

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*

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* @return bool|null True on write success, false on failure. Null in multisite.

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*/

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function iis7_save_url_rewrite_rules() {

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global $wp_rewrite;

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if ( is_multisite() ) {

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return null;

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}

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// Ensure get_home_path() is declared.

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require_once ABSPATH . 'wp-admin/includes/file.php';

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$home_path = get_home_path();

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$web_config_file = $home_path . 'web.config';

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// Using win_is_writable() instead of is_writable() because of a bug in Windows PHP.

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if ( iis7_supports_permalinks()

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&& ( ! file_exists( $web_config_file ) && win_is_writable( $home_path ) && $wp_rewrite->using_mod_rewrite_permalinks()

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|| win_is_writable( $web_config_file ) )

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) {

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$rule = $wp_rewrite->iis7_url_rewrite_rules( false );

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if ( ! empty( $rule ) ) {

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return iis7_add_rewrite_rule( $web_config_file, $rule );

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} else {

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return iis7_delete_rewrite_rule( $web_config_file );

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}

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}

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return false;

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}

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/**

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* Updates the "recently-edited" file for the plugin or theme file editor.

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*

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* @since 1.5.0

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*

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* @param string $file

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*/

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function update_recently_edited( $file ) {

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$oldfiles = (array) get_option( 'recently_edited' );

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if ( $oldfiles ) {

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$oldfiles = array_reverse( $oldfiles );

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$oldfiles[] = $file;

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$oldfiles = array_reverse( $oldfiles );

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$oldfiles = array_unique( $oldfiles );

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if ( 5 < count( $oldfiles ) ) {

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array_pop( $oldfiles );

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}

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} else {

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$oldfiles[] = $file;

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}

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update_option( 'recently_edited', $oldfiles );

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}

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/**

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* Makes a tree structure for the theme file editor's file list.

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*

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* @since 4.9.0

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* @access private

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*

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* @param array $allowed_files List of theme file paths.

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* @return array Tree structure for listing theme files.

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*/

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function wp_make_theme_file_tree( $allowed_files ) {

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$tree_list = array();

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foreach ( $allowed_files as $file_name => $absolute_filename ) {

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$list = explode( '/', $file_name );

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$last_dir = &$tree_list;

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foreach ( $list as $dir ) {

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$last_dir =& $last_dir[ $dir ];

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}

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$last_dir = $file_name;

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}

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return $tree_list;

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}

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/**

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* Outputs the formatted file list for the theme file editor.

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*

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* @since 4.9.0

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* @access private

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*

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* @global string $relative_file Name of the file being edited relative to the

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* theme directory.

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* @global string $stylesheet The stylesheet name of the theme being edited.

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*

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* @param array|string $tree List of file/folder paths, or filename.

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* @param int $level The aria-level for the current iteration.

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* @param int $size The aria-setsize for the current iteration.

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* @param int $index The aria-posinset for the current iteration.

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*/

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function wp_print_theme_file_tree( $tree, $level = 2, $size = 1, $index = 1 ) {

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global $relative_file, $stylesheet;

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if ( is_array( $tree ) ) {

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$index = 0;

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$size = count( $tree );

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foreach ( $tree as $label => $theme_file ) :

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++$index;

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if ( ! is_array( $theme_file ) ) {

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wp_print_theme_file_tree( $theme_file, $level, $index, $size );

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continue;

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}

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?>

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<li role="treeitem" aria-expanded="true" tabindex="-1"

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aria-level="<?php echo esc_attr( $level ); ?>"

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aria-setsize="<?php echo esc_attr( $size ); ?>"

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aria-posinset="<?php echo esc_attr( $index ); ?>">

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<span class="folder-label"><?php echo esc_html( $label ); ?> <span class="screen-reader-text">

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<?php

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/* translators: Hidden accessibility text. */

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_e( 'folder' );

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?>

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</span><span aria-hidden="true" class="icon"></span></span>

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<ul role="group" class="tree-folder"><?php wp_print_theme_file_tree( $theme_file, $level + 1, $index, $size ); ?></ul>

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</li>

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<?php

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endforeach;

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} else {

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$filename = $tree;

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$url = add_query_arg(

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array(

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'file' => rawurlencode( $tree ),

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'theme' => rawurlencode( $stylesheet ),

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),

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self_admin_url( 'theme-editor.php' )

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);

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?>

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<li role="none" class="<?php echo esc_attr( $relative_file === $filename ? 'current-file' : '' ); ?>">

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<a role="treeitem" tabindex="<?php echo esc_attr( $relative_file === $filename ? '0' : '-1' ); ?>"

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href="<?php echo esc_url( $url ); ?>"

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aria-level="<?php echo esc_attr( $level ); ?>"

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aria-setsize="<?php echo esc_attr( $size ); ?>"

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aria-posinset="<?php echo esc_attr( $index ); ?>">

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<?php

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$file_description = esc_html( get_file_description( $filename ) );

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if ( $file_description !== $filename && wp_basename( $filename ) !== $file_description ) {

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$file_description .= '<br /><span class="nonessential">(' . esc_html( $filename ) . ')</span>';

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}

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if ( $relative_file === $filename ) {

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echo '<span class="notice notice-info">' . $file_description . '</span>';

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} else {

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echo $file_description;

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}

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?>

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</a>

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</li>

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<?php

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}

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}

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/**

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* Makes a tree structure for the plugin file editor's file list.

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*

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* @since 4.9.0

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* @access private

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*

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* @param array $plugin_editable_files List of plugin file paths.

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* @return array Tree structure for listing plugin files.

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*/

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function wp_make_plugin_file_tree( $plugin_editable_files ) {

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$tree_list = array();

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foreach ( $plugin_editable_files as $plugin_file ) {

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$list = explode( '/', preg_replace( '#^.+?/#', '', $plugin_file ) );

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$last_dir = &$tree_list;

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foreach ( $list as $dir ) {

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$last_dir =& $last_dir[ $dir ];

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}

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$last_dir = $plugin_file;

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}

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return $tree_list;

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}

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/**

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* Outputs the formatted file list for the plugin file editor.

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*

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* @since 4.9.0

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* @access private

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*

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* @param array|string $tree List of file/folder paths, or filename.

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* @param string $label Name of file or folder to print.

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* @param int $level The aria-level for the current iteration.

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* @param int $size The aria-setsize for the current iteration.

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* @param int $index The aria-posinset for the current iteration.

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*/

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