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Update WP and plugins

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This commit is contained in:
Oliver Davies 2019-04-16 20:56:22 +01:00
parent 10a4713229
commit 1fb77fc4ff
864 changed files with 101724 additions and 78262 deletions
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268
wp-includes/class-wp.php
View file

@ -12,9 +12,9 @@ class WP {
* Long list of public query variables.
*
* @since 2.0.0
* @var array
* @var string[]
*/
public $public_query_vars = array('m', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'static', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'static', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
/**
* Private query variables.
@ -22,7 +22,7 @@ class WP {
* Long list of private query variables.
*
* @since 2.0.0
* @var array
* @var string[]
*/
public $private_query_vars = array( 'offset', 'posts_per_page', 'posts_per_archive_page', 'showposts', 'nopaging', 'post_type', 'post_status', 'category__in', 'category__not_in', 'category__and', 'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'tag_id', 'post_mime_type', 'perm', 'comments_per_page', 'post__in', 'post__not_in', 'post_parent', 'post_parent__in', 'post_parent__not_in', 'title', 'fields' );
@ -89,9 +89,10 @@ class WP {
*
* @param string $qv Query variable name.
*/
public function add_query_var($qv) {
if ( !in_array($qv, $this->public_query_vars) )
public function add_query_var( $qv ) {
if ( ! in_array( $qv, $this->public_query_vars ) ) {
$this->public_query_vars[] = $qv;
}
}
/**
@ -113,8 +114,8 @@ class WP {
* @param string $key Query variable name.
* @param mixed $value Query variable value.
*/
public function set_query_var($key, $value) {
$this->query_vars[$key] = $value;
public function set_query_var( $key, $value ) {
$this->query_vars[ $key ] = $value;
}
/**
@ -129,7 +130,7 @@ class WP {
*
* @param array|string $extra_query_vars Set the extra query variables.
*/
public function parse_request($extra_query_vars = '') {
public function parse_request( $extra_query_vars = '' ) {
global $wp_rewrite;
/**
@ -141,10 +142,11 @@ class WP {
* @param WP $this Current WordPress environment instance.
* @param array|string $extra_query_vars Extra passed query variables.
*/
if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) )
if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) {
return;
}
$this->query_vars = array();
$this->query_vars = array();
$post_type_query_vars = array();
if ( is_array( $extra_query_vars ) ) {
@ -157,43 +159,44 @@ class WP {
// Fetch the rewrite rules.
$rewrite = $wp_rewrite->wp_rewrite_rules();
if ( ! empty($rewrite) ) {
if ( ! empty( $rewrite ) ) {
// If we match a rewrite rule, this will be cleared.
$error = '404';
$error = '404';
$this->did_permalink = true;
$pathinfo = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : '';
$pathinfo = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : '';
list( $pathinfo ) = explode( '?', $pathinfo );
$pathinfo = str_replace( "%", "%25", $pathinfo );
$pathinfo = str_replace( '%', '%25', $pathinfo );
list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );
$self = $_SERVER['PHP_SELF'];
$home_path = trim( parse_url( home_url(), PHP_URL_PATH ), '/' );
$self = $_SERVER['PHP_SELF'];
$home_path = trim( parse_url( home_url(), PHP_URL_PATH ), '/' );
$home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) );
// Trim path info from the end and the leading home path from the
// front. For path info requests, this leaves us with the requesting
// filename, if any. For 404 requests, this leaves us with the
// requested permalink.
$req_uri = str_replace($pathinfo, '', $req_uri);
$req_uri = trim($req_uri, '/');
$req_uri = preg_replace( $home_path_regex, '', $req_uri );
$req_uri = trim($req_uri, '/');
$pathinfo = trim($pathinfo, '/');
$req_uri = str_replace( $pathinfo, '', $req_uri );
$req_uri = trim( $req_uri, '/' );
$req_uri = preg_replace( $home_path_regex, '', $req_uri );
$req_uri = trim( $req_uri, '/' );
$pathinfo = trim( $pathinfo, '/' );
$pathinfo = preg_replace( $home_path_regex, '', $pathinfo );
$pathinfo = trim($pathinfo, '/');
$self = trim($self, '/');
$self = preg_replace( $home_path_regex, '', $self );
$self = trim($self, '/');
$pathinfo = trim( $pathinfo, '/' );
$self = trim( $self, '/' );
$self = preg_replace( $home_path_regex, '', $self );
$self = trim( $self, '/' );
// The requested permalink is in $pathinfo for path info requests and
// $req_uri for other requests.
if ( ! empty($pathinfo) && !preg_match('|^.*' . $wp_rewrite->index . '$|', $pathinfo) ) {
if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) {
$requested_path = $pathinfo;
} else {
// If the request uri is the index, blank it out so that we don't try to match it against a rule.
if ( $req_uri == $wp_rewrite->index )
if ( $req_uri == $wp_rewrite->index ) {
$req_uri = '';
}
$requested_path = $req_uri;
}
$requested_file = $req_uri;
@ -206,23 +209,24 @@ class WP {
// An empty request could only match against ^$ regex
if ( isset( $rewrite['$'] ) ) {
$this->matched_rule = '$';
$query = $rewrite['$'];
$matches = array('');
$query = $rewrite['$'];
$matches = array( '' );
}
} else {
foreach ( (array) $rewrite as $match => $query ) {
// If the requested file is the anchor of the match, prepend it to the path info.
if ( ! empty($requested_file) && strpos($match, $requested_file) === 0 && $requested_file != $requested_path )
if ( ! empty( $requested_file ) && strpos( $match, $requested_file ) === 0 && $requested_file != $requested_path ) {
$request_match = $requested_file . '/' . $requested_path;
}
if ( preg_match("#^$match#", $request_match, $matches) ||
preg_match("#^$match#", urldecode($request_match), $matches) ) {
if ( preg_match( "#^$match#", $request_match, $matches ) ||
preg_match( "#^$match#", urldecode( $request_match ), $matches ) ) {
if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
// This is a verbose page match, let's check to be sure about it.
$page = get_page_by_path( $matches[ $varmatch[1] ] );
if ( ! $page ) {
continue;
continue;
}
$post_status_obj = get_post_status_object( $page->post_status );
@ -241,27 +245,29 @@ class WP {
if ( isset( $this->matched_rule ) ) {
// Trim the query of everything up to the '?'.
$query = preg_replace("!^.+\?!", '', $query);
$query = preg_replace( '!^.+\?!', '', $query );
// Substitute the substring matches into the query.
$query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
$query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) );
$this->matched_query = $query;
// Parse the query.
parse_str($query, $perma_query_vars);
parse_str( $query, $perma_query_vars );
// If we're processing a 404 request, clear the error var since we found something.
if ( '404' == $error )
if ( '404' == $error ) {
unset( $error, $_GET['error'] );
}
}
// If req_uri is empty or if it is a request for ourself, unset error.
if ( empty($requested_path) || $requested_file == $self || strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false ) {
if ( empty( $requested_path ) || $requested_file == $self || strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {
unset( $error, $_GET['error'] );
if ( isset($perma_query_vars) && strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false )
if ( isset( $perma_query_vars ) && strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {
unset( $perma_query_vars );
}
$this->did_permalink = false;
}
@ -276,50 +282,53 @@ class WP {
*
* @since 1.5.0
*
* @param array $public_query_vars The array of whitelisted query variables.
* @param string[] $public_query_vars The array of whitelisted query variable names.
*/
$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );
foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {
if ( is_post_type_viewable( $t ) && $t->query_var ) {
$post_type_query_vars[$t->query_var] = $post_type;
$post_type_query_vars[ $t->query_var ] = $post_type;
}
}
foreach ( $this->public_query_vars as $wpvar ) {
if ( isset( $this->extra_query_vars[$wpvar] ) )
$this->query_vars[$wpvar] = $this->extra_query_vars[$wpvar];
elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) && $_GET[ $wpvar ] !== $_POST[ $wpvar ] )
if ( isset( $this->extra_query_vars[ $wpvar ] ) ) {
$this->query_vars[ $wpvar ] = $this->extra_query_vars[ $wpvar ];
} elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) && $_GET[ $wpvar ] !== $_POST[ $wpvar ] ) {
wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 );
elseif ( isset( $_POST[$wpvar] ) )
$this->query_vars[$wpvar] = $_POST[$wpvar];
elseif ( isset( $_GET[$wpvar] ) )
$this->query_vars[$wpvar] = $_GET[$wpvar];
elseif ( isset( $perma_query_vars[$wpvar] ) )
$this->query_vars[$wpvar] = $perma_query_vars[$wpvar];
} elseif ( isset( $_POST[ $wpvar ] ) ) {
$this->query_vars[ $wpvar ] = $_POST[ $wpvar ];
} elseif ( isset( $_GET[ $wpvar ] ) ) {
$this->query_vars[ $wpvar ] = $_GET[ $wpvar ];
} elseif ( isset( $perma_query_vars[ $wpvar ] ) ) {
$this->query_vars[ $wpvar ] = $perma_query_vars[ $wpvar ];
}
if ( !empty( $this->query_vars[$wpvar] ) ) {
if ( ! is_array( $this->query_vars[$wpvar] ) ) {
$this->query_vars[$wpvar] = (string) $this->query_vars[$wpvar];
if ( ! empty( $this->query_vars[ $wpvar ] ) ) {
if ( ! is_array( $this->query_vars[ $wpvar ] ) ) {
$this->query_vars[ $wpvar ] = (string) $this->query_vars[ $wpvar ];
} else {
foreach ( $this->query_vars[$wpvar] as $vkey => $v ) {
if ( !is_object( $v ) ) {
$this->query_vars[$wpvar][$vkey] = (string) $v;
foreach ( $this->query_vars[ $wpvar ] as $vkey => $v ) {
if ( is_scalar( $v ) ) {
$this->query_vars[ $wpvar ][ $vkey ] = (string) $v;
}
}
}
if ( isset($post_type_query_vars[$wpvar] ) ) {
$this->query_vars['post_type'] = $post_type_query_vars[$wpvar];
$this->query_vars['name'] = $this->query_vars[$wpvar];
if ( isset( $post_type_query_vars[ $wpvar ] ) ) {
$this->query_vars['post_type'] = $post_type_query_vars[ $wpvar ];
$this->query_vars['name'] = $this->query_vars[ $wpvar ];
}
}
}
// Convert urldecoded spaces back into +
foreach ( get_taxonomies( array() , 'objects' ) as $taxonomy => $t )
if ( $t->query_var && isset( $this->query_vars[$t->query_var] ) )
$this->query_vars[$t->query_var] = str_replace( ' ', '+', $this->query_vars[$t->query_var] );
foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {
if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) {
$this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] );
}
}
// Don't allow non-publicly queryable taxonomies to be queried from the front end.
if ( ! is_admin() ) {
@ -335,11 +344,12 @@ class WP {
}
// Limit publicly queried post_types to those that are publicly_queryable
if ( isset( $this->query_vars['post_type']) ) {
$queryable_post_types = get_post_types( array('publicly_queryable' => true) );
if ( isset( $this->query_vars['post_type'] ) ) {
$queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) );
if ( ! is_array( $this->query_vars['post_type'] ) ) {
if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types ) )
if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types ) ) {
unset( $this->query_vars['post_type'] );
}
} else {
$this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
}
@ -348,13 +358,15 @@ class WP {
// Resolve conflicts between posts with numeric slugs and date archive queries.
$this->query_vars = wp_resolve_numeric_slug_conflicts( $this->query_vars );
foreach ( (array) $this->private_query_vars as $var) {
if ( isset($this->extra_query_vars[$var]) )
$this->query_vars[$var] = $this->extra_query_vars[$var];
foreach ( (array) $this->private_query_vars as $var ) {
if ( isset( $this->extra_query_vars[ $var ] ) ) {
$this->query_vars[ $var ] = $this->extra_query_vars[ $var ];
}
}
if ( isset($error) )
if ( isset( $error ) ) {
$this->query_vars['error'] = $error;
}
/**
* Filters the array of parsed query variables.
@ -385,23 +397,25 @@ class WP {
* @since 4.4.0 `X-Pingback` header is added conditionally after posts have been queried in handle_404().
*/
public function send_headers() {
$headers = array();
$status = null;
$headers = array();
$status = null;
$exit_required = false;
if ( is_user_logged_in() )
$headers = array_merge($headers, wp_get_nocache_headers());
if ( is_user_logged_in() ) {
$headers = array_merge( $headers, wp_get_nocache_headers() );
}
if ( ! empty( $this->query_vars['error'] ) ) {
$status = (int) $this->query_vars['error'];
if ( 404 === $status ) {
if ( ! is_user_logged_in() )
$headers = array_merge($headers, wp_get_nocache_headers());
$headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
if ( ! is_user_logged_in() ) {
$headers = array_merge( $headers, wp_get_nocache_headers() );
}
$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
} elseif ( in_array( $status, array( 403, 500, 502, 503 ) ) ) {
$exit_required = true;
}
} elseif ( empty( $this->query_vars['feed'] ) ) {
$headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
} else {
// Set the correct content type for feeds
$type = $this->query_vars['feed'];
@ -412,16 +426,16 @@ class WP {
// We're showing a feed, so WP is indeed the only thing that last changed.
if ( ! empty( $this->query_vars['withcomments'] )
|| false !== strpos( $this->query_vars['feed'], 'comments-' )
|| ( empty( $this->query_vars['withoutcomments'] )
&& ( ! empty( $this->query_vars['p'] )
|| ! empty( $this->query_vars['name'] )
|| ! empty( $this->query_vars['page_id'] )
|| ! empty( $this->query_vars['pagename'] )
|| ! empty( $this->query_vars['attachment'] )
|| ! empty( $this->query_vars['attachment_id'] )
)
)
|| false !== strpos( $this->query_vars['feed'], 'comments-' )
|| ( empty( $this->query_vars['withoutcomments'] )
&& ( ! empty( $this->query_vars['p'] )
|| ! empty( $this->query_vars['name'] )
|| ! empty( $this->query_vars['page_id'] )
|| ! empty( $this->query_vars['pagename'] )
|| ! empty( $this->query_vars['attachment'] )
|| ! empty( $this->query_vars['attachment_id'] )
)
)
) {
$wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastcommentmodified( 'GMT' ), false );
} else {
@ -434,26 +448,28 @@ class WP {
$wp_last_modified .= ' GMT';
$wp_etag = '"' . md5($wp_last_modified) . '"';
$wp_etag = '"' . md5( $wp_last_modified ) . '"';
$headers['Last-Modified'] = $wp_last_modified;
$headers['ETag'] = $wp_etag;
$headers['ETag'] = $wp_etag;
// Support for Conditional GET
if (isset($_SERVER['HTTP_IF_NONE_MATCH']))
if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) {
$client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] );
else $client_etag = false;
} else {
$client_etag = false;
}
$client_last_modified = empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? '' : trim($_SERVER['HTTP_IF_MODIFIED_SINCE']);
$client_last_modified = empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? '' : trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
// If string is empty, return 0. If not, attempt to parse into a timestamp
$client_modified_timestamp = $client_last_modified ? strtotime($client_last_modified) : 0;
$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0;
// Make a timestamp for our most recent modification...
$wp_modified_timestamp = strtotime($wp_last_modified);
$wp_modified_timestamp = strtotime( $wp_last_modified );
if ( ($client_last_modified && $client_etag) ?
(($client_modified_timestamp >= $wp_modified_timestamp) && ($client_etag == $wp_etag)) :
(($client_modified_timestamp >= $wp_modified_timestamp) || ($client_etag == $wp_etag)) ) {
$status = 304;
if ( ( $client_last_modified && $client_etag ) ?
( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag == $wp_etag ) ) :
( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag == $wp_etag ) ) ) {
$status = 304;
$exit_required = true;
}
}
@ -463,13 +479,14 @@ class WP {
*
* @since 2.8.0
*
* @param array $headers The list of headers to be sent.
* @param WP $this Current WordPress environment instance.
* @param string[] $headers Associative array of headers to be sent.
* @param WP $this Current WordPress environment instance.
*/
$headers = apply_filters( 'wp_headers', $headers, $this );
if ( ! empty( $status ) )
if ( ! empty( $status ) ) {
status_header( $status );
}
// If Last-Modified is set to false, it should not be sent (no-cache situation).
if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) {
@ -490,11 +507,13 @@ class WP {
}
}
foreach ( (array) $headers as $name => $field_value )
@header("{$name}: {$field_value}");
foreach ( (array) $headers as $name => $field_value ) {
@header( "{$name}: {$field_value}" );
}
if ( $exit_required )
if ( $exit_required ) {
exit();
}
/**
* Fires once the requested HTTP headers for caching, content type, etc. have been sent.
@ -516,12 +535,13 @@ class WP {
*/
public function build_query_string() {
$this->query_string = '';
foreach ( (array) array_keys($this->query_vars) as $wpvar) {
if ( '' != $this->query_vars[$wpvar] ) {
$this->query_string .= (strlen($this->query_string) < 1) ? '' : '&';
if ( !is_scalar($this->query_vars[$wpvar]) ) // Discard non-scalars.
foreach ( (array) array_keys( $this->query_vars ) as $wpvar ) {
if ( '' != $this->query_vars[ $wpvar ] ) {
$this->query_string .= ( strlen( $this->query_string ) < 1 ) ? '' : '&';
if ( ! is_scalar( $this->query_vars[ $wpvar ] ) ) { // Discard non-scalars.
continue;
$this->query_string .= $wpvar . '=' . rawurlencode($this->query_vars[$wpvar]);
}
$this->query_string .= $wpvar . '=' . rawurlencode( $this->query_vars[ $wpvar ] );
}
}
@ -535,7 +555,7 @@ class WP {
* @param string $query_string The query string to modify.
*/
$this->query_string = apply_filters( 'query_string', $this->query_string );
parse_str($this->query_string, $this->query_vars);
parse_str( $this->query_string, $this->query_vars );
}
}
@ -566,17 +586,18 @@ class WP {
}
$GLOBALS['query_string'] = $this->query_string;
$GLOBALS['posts'] = & $wp_query->posts;
$GLOBALS['post'] = isset( $wp_query->post ) ? $wp_query->post : null;
$GLOBALS['request'] = $wp_query->request;
$GLOBALS['posts'] = & $wp_query->posts;
$GLOBALS['post'] = isset( $wp_query->post ) ? $wp_query->post : null;
$GLOBALS['request'] = $wp_query->request;
if ( $wp_query->is_single() || $wp_query->is_page() ) {
$GLOBALS['more'] = 1;
$GLOBALS['single'] = 1;
}
if ( $wp_query->is_author() && isset( $wp_query->post ) )
if ( $wp_query->is_author() && isset( $wp_query->post ) ) {
$GLOBALS['authordata'] = get_userdata( $wp_query->post->post_author );
}
}
/**
@ -598,10 +619,10 @@ class WP {
public function query_posts() {
global $wp_the_query;
$this->build_query_string();
$wp_the_query->query($this->query_vars);
}
$wp_the_query->query( $this->query_vars );
}
/**
/**
* Set the Headers for 404, if nothing is found for requested URL.
*
* Issue a 404 if a request doesn't match any posts and doesn't match
@ -615,9 +636,9 @@ class WP {
* a 404 so that canonical redirection logic can kick in.
*
* @since 2.0.0
*
*
* @global WP_Query $wp_query
*/
*/
public function handle_404() {
global $wp_query;
@ -637,8 +658,9 @@ class WP {
}
// If we've already issued a 404, bail.
if ( is_404() )
if ( is_404() ) {
return;
}
// Never 404 for the admin, robots, or if we found posts.
if ( is_admin() || is_robots() || $wp_query->posts ) {
@ -659,7 +681,7 @@ class WP {
// check for paged content that exceeds the max number of pages
$next = '<!--nextpage-->';
if ( $p && false !== strpos( $p->post_content, $next ) && ! empty( $this->query_vars['page'] ) ) {
$page = trim( $this->query_vars['page'], '/' );
$page = trim( $this->query_vars['page'], '/' );
$success = (int) $page <= ( substr_count( $p->post_content, $next ) + 1 );
}
}
@ -710,9 +732,9 @@ class WP {
*
* @param string|array $query_args Passed to parse_request().
*/
public function main($query_args = '') {
public function main( $query_args = '' ) {
$this->init();
$this->parse_request($query_args);
$this->parse_request( $query_args );
$this->send_headers();
$this->query_posts();
$this->handle_404();