WordPressを読む　45-1 /blog/wp-includes/comment.php 1

2014/11/30 2015/01/11

1 /blog/wp-includes/comment.php 1
2 関数　check_comment()
3 関数　get_approved_comments()
4 関数　get_comment()
5 関数　get_comments()
6 クラス　WP_Comment_Query::クラス変数
7 クラス　WP_Comment_Query::__call()
8 クラス　WP_Comment_Query::query()

/blog/wp-includes/comment.php 1

関数　check_comment()

<?php
/**
 * Manages WordPress comments
 *
 * @package WordPress
 * @subpackage Comment
 */

/**
 * Checks whether a comment passes internal checks to be allowed to add.
 *
 * If comment moderation is set in the administration, then all comments,
 * regardless of their type and whitelist will be set to false. If the number of
 * links exceeds the amount in the administration, then the check fails. If any
 * of the parameter contents match the blacklist of words, then the check fails.
 *
 * If the number of links exceeds the amount in the administration, then the
 * check fails. If any of the parameter contents match the blacklist of words,
 * then the check fails.
 *
 * If the comment author was approved before, then the comment is
 * automatically whitelisted.
 *
 * If none of the checks fail, then the failback is to set the check to pass
 * (return true).
 *
 * @since 1.2.0
 * @uses $wpdb
 *
 * @param string $author Comment Author's name
 * @param string $email Comment Author's email
 * @param string $url Comment Author's URL
 * @param string $comment Comment contents
 * @param string $user_ip Comment Author's IP address
 * @param string $user_agent Comment Author's User Agent
 * @param string $comment_type Comment type, either user submitted comment,
 *		trackback, or pingback
 * @return bool Whether the checks passed (true) and the comments should be
 *		displayed or set to moderated
 */
function check_comment($author, $email, $url, $comment, $user_ip, $user_agent, $comment_type) {
	global $wpdb;

	if ( 1 == get_option('comment_moderation') )
		return false; // If moderation is set to manual

	/** This filter is documented in wp-includes/comment-template.php */
	$comment = apply_filters( 'comment_text', $comment );

	// Check # of external links
	if ( $max_links = get_option( 'comment_max_links' ) ) {
		$num_links = preg_match_all( '/<a [^>]*href/i', $comment, $out );
		/**
		 * Filter the maximum number of links allowed in a comment.
		 *
		 * @since 3.0.0
		 *
		 * @param int    $num_links The number of links allowed.
		 * @param string $url       Comment author's URL. Included in allowed links total.
		 */
		$num_links = apply_filters( 'comment_max_links_url', $num_links, $url );
		if ( $num_links >= $max_links )
			return false;
	}

	$mod_keys = trim(get_option('moderation_keys'));
	if ( !empty($mod_keys) ) {
		$words = explode("\n", $mod_keys );

		foreach ( (array) $words as $word) {
			$word = trim($word);

			// Skip empty lines
			if ( empty($word) )
				continue;

			// Do some escaping magic so that '#' chars in the
			// spam words don't break things:
			$word = preg_quote($word, '#');

			$pattern = "#$word#i";
			if ( preg_match($pattern, $author) ) return false;
			if ( preg_match($pattern, $email) ) return false;
			if ( preg_match($pattern, $url) ) return false;
			if ( preg_match($pattern, $comment) ) return false;
			if ( preg_match($pattern, $user_ip) ) return false;
			if ( preg_match($pattern, $user_agent) ) return false;
		}
	}

	// Comment whitelisting:
	if ( 1 == get_option('comment_whitelist')) {
		if ( 'trackback' != $comment_type && 'pingback' != $comment_type && $author != '' && $email != '' ) {
			// expected_slashed ($author, $email)
			$ok_to_comment = $wpdb->get_var("SELECT comment_approved FROM $wpdb->comments WHERE comment_author = '$author' AND comment_author_email = '$email' and comment_approved = '1' LIMIT 1");
			if ( ( 1 == $ok_to_comment ) &&
				( empty($mod_keys) || false === strpos( $email, $mod_keys) ) )
					return true;
			else
				return false;
		} else {
			return false;
		}
	}
	return true;
}

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<?php

/**

* Manages WordPress comments

* @package WordPress

* @subpackage Comment

/**

* Checks whether a comment passes internal checks to be allowed to add.

* If comment moderation is set in the administration, then all comments,

* regardless of their type and whitelist will be set to false. If the number of

* links exceeds the amount in the administration, then the check fails. If any

* of the parameter contents match the blacklist of words, then the check fails.

* If the number of links exceeds the amount in the administration, then the

* check fails. If any of the parameter contents match the blacklist of words,

* then the check fails.

* If the comment author was approved before, then the comment is

* automatically whitelisted.

* If none of the checks fail, then the failback is to set the check to pass

* (return true).

* @since 1.2.0

* @uses $wpdb

* @param string $author Comment Author's name

* @param string $email Comment Author's email

* @param string $url Comment Author's URL

* @param string $comment Comment contents

* @param string $user_ip Comment Author's IP address

* @param string $user_agent Comment Author's User Agent

* @param string $comment_type Comment type, either user submitted comment,

* trackback, or pingback

* @return bool Whether the checks passed (true) and the comments should be

* displayed or set to moderated

function check_comment($author, $email, $url, $comment, $user_ip, $user_agent, $comment_type) {

global $wpdb;

if ( 1 == get_option('comment_moderation') )

return false; // If moderation is set to manual

/** This filter is documented in wp-includes/comment-template.php */

$comment = apply_filters( 'comment_text', $comment );

// Check # of external links

if ( $max_links = get_option( 'comment_max_links' ) ) {

$num_links = preg_match_all( '/<a [^>]*href/i', $comment, $out );

/**

* Filter the maximum number of links allowed in a comment.

* @since 3.0.0

* @param int $num_links The number of links allowed.

* @param string $url Comment author's URL. Included in allowed links total.

$num_links = apply_filters( 'comment_max_links_url', $num_links, $url );

if ( $num_links >= $max_links )

return false;

}

$mod_keys = trim(get_option('moderation_keys'));

if ( !empty($mod_keys) ) {

$words = explode("\n", $mod_keys );

foreach ( (array) $words as $word) {

$word = trim($word);

// Skip empty lines

if ( empty($word) )

continue;

// Do some escaping magic so that '#' chars in the

// spam words don't break things:

$word = preg_quote($word, '#');

$pattern = "#$word#i";

if ( preg_match($pattern, $author) ) return false;

if ( preg_match($pattern, $email) ) return false;

if ( preg_match($pattern, $url) ) return false;

if ( preg_match($pattern, $comment) ) return false;

if ( preg_match($pattern, $user_ip) ) return false;

if ( preg_match($pattern, $user_agent) ) return false;

}

// Comment whitelisting:

if ( 1 == get_option('comment_whitelist')) {

if ( 'trackback' != $comment_type && 'pingback' != $comment_type && $author != '' && $email != '' ) {

// expected_slashed ($author, $email)

$ok_to_comment = $wpdb->get_var("SELECT comment_approved FROM $wpdb->comments WHERE comment_author = '$author' AND comment_author_email = '$email' and comment_approved = '1' LIMIT 1");

if ( ( 1 == $ok_to_comment ) &&

( empty($mod_keys) || false === strpos( $email, $mod_keys) ) )

return true;

else

return false;

} else {

return false;

}

return true;

}

関数　get_approved_comments()

/**
 * Retrieve the approved comments for post $post_id.
 *
 * @since 2.0.0
 * @uses $wpdb
 *
 * @param int $post_id The ID of the post
 * @return array $comments The approved comments
 */
function get_approved_comments($post_id) {
	global $wpdb;
	return $wpdb->get_results($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1' ORDER BY comment_date", $post_id));
}

/**

* Retrieve the approved comments for post $post_id.

* @since 2.0.0

* @uses $wpdb

* @param int $post_id The ID of the post

* @return array $comments The approved comments

function get_approved_comments($post_id) {

global $wpdb;

return $wpdb->get_results($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1' ORDER BY comment_date", $post_id));

}

関数　get_comment()

/**
 * Retrieves comment data given a comment ID or comment object.
 *
 * If an object is passed then the comment data will be cached and then returned
 * after being passed through a filter. If the comment is empty, then the global
 * comment variable will be used, if it is set.
 *
 * @since 2.0.0
 * @uses $wpdb
 *
 * @param object|string|int $comment Comment to retrieve.
 * @param string $output Optional. OBJECT or ARRAY_A or ARRAY_N constants.
 * @return object|array|null Depends on $output value.
 */
function get_comment(&$comment, $output = OBJECT) {
	global $wpdb;

	if ( empty($comment) ) {
		if ( isset($GLOBALS['comment']) )
			$_comment = & $GLOBALS['comment'];
		else
			$_comment = null;
	} elseif ( is_object($comment) ) {
		wp_cache_add($comment->comment_ID, $comment, 'comment');
		$_comment = $comment;
	} else {
		if ( isset($GLOBALS['comment']) && ($GLOBALS['comment']->comment_ID == $comment) ) {
			$_comment = & $GLOBALS['comment'];
		} elseif ( ! $_comment = wp_cache_get($comment, 'comment') ) {
			$_comment = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment));
			if ( ! $_comment )
				return null;
			wp_cache_add($_comment->comment_ID, $_comment, 'comment');
		}
	}

	/**
	 * Fires after a comment is retrieved.
	 *
	 * @since 2.3.0
	 *
	 * @param mixed $_comment Comment data.
	 */
	$_comment = apply_filters( 'get_comment', $_comment );

	if ( $output == OBJECT ) {
		return $_comment;
	} elseif ( $output == ARRAY_A ) {
		$__comment = get_object_vars($_comment);
		return $__comment;
	} elseif ( $output == ARRAY_N ) {
		$__comment = array_values(get_object_vars($_comment));
		return $__comment;
	} else {
		return $_comment;
	}
}

/**

* Retrieves comment data given a comment ID or comment object.

* If an object is passed then the comment data will be cached and then returned

* after being passed through a filter. If the comment is empty, then the global

* comment variable will be used, if it is set.

* @since 2.0.0

* @uses $wpdb

* @param object|string|int $comment Comment to retrieve.

* @param string $output Optional. OBJECT or ARRAY_A or ARRAY_N constants.

* @return object|array|null Depends on $output value.

function get_comment(&$comment, $output = OBJECT) {

global $wpdb;

if ( empty($comment) ) {

if ( isset($GLOBALS['comment']) )

$_comment = & $GLOBALS['comment'];

else

$_comment = null;

} elseif ( is_object($comment) ) {

wp_cache_add($comment->comment_ID, $comment, 'comment');

$_comment = $comment;

} else {

if ( isset($GLOBALS['comment']) && ($GLOBALS['comment']->comment_ID == $comment) ) {

$_comment = & $GLOBALS['comment'];

} elseif ( ! $_comment = wp_cache_get($comment, 'comment') ) {

$_comment = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment));

if ( ! $_comment )

return null;

wp_cache_add($_comment->comment_ID, $_comment, 'comment');

}

/**

* Fires after a comment is retrieved.

* @since 2.3.0

* @param mixed $_comment Comment data.

$_comment = apply_filters( 'get_comment', $_comment );

if ( $output == OBJECT ) {

return $_comment;

} elseif ( $output == ARRAY_A ) {

$__comment = get_object_vars($_comment);

return $__comment;

} elseif ( $output == ARRAY_N ) {

$__comment = array_values(get_object_vars($_comment));

return $__comment;

} else {

return $_comment;

}

関数　get_comments()

/**
 * Retrieve a list of comments.
 *
 * The comment list can be for the blog as a whole or for an individual post.
 *
 * The list of comment arguments are 'status', 'orderby', 'comment_date_gmt',
 * 'order', 'number', 'offset', and 'post_id'.
 *
 * @since 2.7.0
 * @uses $wpdb
 *
 * @param mixed $args Optional. Array or string of options to override defaults.
 * @return array List of comments.
 */
function get_comments( $args = '' ) {
	$query = new WP_Comment_Query;
	return $query->query( $args );
}

/**

* Retrieve a list of comments.

* The comment list can be for the blog as a whole or for an individual post.

* The list of comment arguments are 'status', 'orderby', 'comment_date_gmt',

* 'order', 'number', 'offset', and 'post_id'.

* @since 2.7.0

* @uses $wpdb

* @param mixed $args Optional. Array or string of options to override defaults.

* @return array List of comments.

function get_comments( $args = '' ) {

$query = new WP_Comment_Query;

return $query->query( $args );

}

クラス　WP_Comment_Query::クラス変数

/**
 * WordPress Comment Query class.
 *
 * @since 3.1.0
 */
class WP_Comment_Query {
	/**
	 * Metadata query container
	 *
	 * @since 3.5.0
	 * @access public
	 * @var object WP_Meta_Query
	 */
	public $meta_query = false;

	/**
	 * Date query container
	 *
	 * @since 3.7.0
	 * @access public
	 * @var object WP_Date_Query
	 */
	public $date_query = false;

/**

* WordPress Comment Query class.

* @since 3.1.0

class WP_Comment_Query {

/**

* Metadata query container

* @since 3.5.0

* @access public

* @var object WP_Meta_Query

public $meta_query = false;

/**

* Date query container

* @since 3.7.0

* @access public

* @var object WP_Date_Query

public $date_query = false;

クラス　WP_Comment_Query::__call()

	/**
	 * Make private/protected methods readable for backwards compatibility.
	 *
	 * @since 4.0.0
	 * @access public
	 *
	 * @param callable $name      Method to call.
	 * @param array    $arguments Arguments to pass when calling.
	 * @return mixed|bool Return value of the callback, false otherwise.
	 */
	public function __call( $name, $arguments ) {
		return call_user_func_array( array( $this, $name ), $arguments );
	}

/**

* Make private/protected methods readable for backwards compatibility.

* @since 4.0.0

* @access public

* @param callable $name Method to call.

* @param array $arguments Arguments to pass when calling.

* @return mixed|bool Return value of the callback, false otherwise.

public function __call( $name, $arguments ) {

return call_user_func_array( array( $this, $name ), $arguments );

}

クラス　WP_Comment_Query::query()

	/**
	 * Execute the query
	 *
	 * @since 3.1.0
	 *
	 * @param string|array $query_vars
	 * @return int|array
	 */
	public function query( $query_vars ) {
		global $wpdb;

		$defaults = array(
			'author_email' => '',
			'fields' => '',
			'ID' => '',
			'karma' => '',
			'number' => '',
			'offset' => '',
			'orderby' => '',
			'order' => 'DESC',
			'parent' => '',
			'post_ID' => '',
			'post_id' => 0,
			'post_author' => '',
			'post_name' => '',
			'post_parent' => '',
			'post_status' => '',
			'post_type' => '',
			'status' => '',
			'type' => '',
			'user_id' => '',
			'search' => '',
			'count' => false,
			'meta_key' => '',
			'meta_value' => '',
			'meta_query' => '',
			'date_query' => null, // See WP_Date_Query
		);

		$groupby = '';

		$this->query_vars = wp_parse_args( $query_vars, $defaults );

		// Parse meta query
		$this->meta_query = new WP_Meta_Query();
		$this->meta_query->parse_query_vars( $this->query_vars );

		/**
		 * Fires before comments are retrieved.
		 *
		 * @since 3.1.0
		 *
		 * @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.
		 */
		do_action_ref_array( 'pre_get_comments', array( &$this ) );

		// $args can be whatever, only use the args defined in defaults to compute the key
		$key = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $defaults ) ) )  );
		$last_changed = wp_cache_get( 'last_changed', 'comment' );
		if ( ! $last_changed ) {
			$last_changed = microtime();
			wp_cache_set( 'last_changed', $last_changed, 'comment' );
		}
		$cache_key = "get_comments:$key:$last_changed";

		if ( $cache = wp_cache_get( $cache_key, 'comment' ) ) {
			return $cache;
		}

		$status = $this->query_vars['status'];
		if ( 'hold' == $status ) {
			$approved = "comment_approved = '0'";
		} elseif ( 'approve' == $status ) {
			$approved = "comment_approved = '1'";
		} elseif ( ! empty( $status ) && 'all' != $status ) {
			$approved = $wpdb->prepare( "comment_approved = %s", $status );
		} else {
			$approved = "( comment_approved = '0' OR comment_approved = '1' )";
		}
		$order = ( 'ASC' == strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC';

		if ( ! empty( $this->query_vars['orderby'] ) ) {
			$ordersby = is_array( $this->query_vars['orderby'] ) ?
				$this->query_vars['orderby'] :
				preg_split( '/[,\s]/', $this->query_vars['orderby'] );

			$allowed_keys = array(
				'comment_agent',
				'comment_approved',
				'comment_author',
				'comment_author_email',
				'comment_author_IP',
				'comment_author_url',
				'comment_content',
				'comment_date',
				'comment_date_gmt',
				'comment_ID',
				'comment_karma',
				'comment_parent',
				'comment_post_ID',
				'comment_type',
				'user_id',
			);
			if ( ! empty( $this->query_vars['meta_key'] ) ) {
				$allowed_keys[] = $this->query_vars['meta_key'];
				$allowed_keys[] = 'meta_value';
				$allowed_keys[] = 'meta_value_num';
			}
			$ordersby = array_intersect( $ordersby, $allowed_keys );
			foreach ( $ordersby as $key => $value ) {
				if ( $value == $this->query_vars['meta_key'] || $value == 'meta_value' ) {
					$ordersby[ $key ] = "$wpdb->commentmeta.meta_value";
				} elseif ( $value == 'meta_value_num' ) {
					$ordersby[ $key ] = "$wpdb->commentmeta.meta_value+0";
				}
			}
			$orderby = empty( $ordersby ) ? 'comment_date_gmt' : implode(', ', $ordersby);
		} else {
			$orderby = 'comment_date_gmt';
		}

		$number = absint( $this->query_vars['number'] );
		$offset = absint( $this->query_vars['offset'] );

		if ( ! empty( $number ) ) {
			if ( $offset ) {
				$limits = 'LIMIT ' . $offset . ',' . $number;
			} else {
				$limits = 'LIMIT ' . $number;
			}
		} else {
			$limits = '';
		}

		if ( $this->query_vars['count'] ) {
			$fields = 'COUNT(*)';
		} else {
			switch ( strtolower( $this->query_vars['fields'] ) ) {
				case 'ids':
					$fields = "$wpdb->comments.comment_ID";
					break;
				default:
					$fields = "*";
					break;
			}
		}

		$join = '';
		$where = $approved;

		$post_id = absint( $this->query_vars['post_id'] );
		if ( ! empty( $post_id ) ) {
			$where .= $wpdb->prepare( ' AND comment_post_ID = %d', $post_id );
		}

		if ( '' !== $this->query_vars['author_email'] ) {
			$where .= $wpdb->prepare( ' AND comment_author_email = %s', $this->query_vars['author_email'] );
		}

		if ( '' !== $this->query_vars['karma'] ) {
			$where .= $wpdb->prepare( ' AND comment_karma = %d', $this->query_vars['karma'] );
		}

		if ( 'comment' == $this->query_vars['type'] ) {
			$where .= " AND comment_type = ''";
		} elseif( 'pings' == $this->query_vars['type'] ) {
			$where .= ' AND comment_type IN ("pingback", "trackback")';
		} elseif ( ! empty( $this->query_vars['type'] ) ) {
			$where .= $wpdb->prepare( ' AND comment_type = %s', $this->query_vars['type'] );
		}

		if ( '' !== $this->query_vars['parent'] ) {
			$where .= $wpdb->prepare( ' AND comment_parent = %d', $this->query_vars['parent'] );
		}

		if ( is_array( $this->query_vars['user_id'] ) ) {
			$where .= ' AND user_id IN (' . implode( ',', array_map( 'absint', $this->query_vars['user_id'] ) ) . ')';
		} elseif ( '' !== $this->query_vars['user_id'] ) {
			$where .= $wpdb->prepare( ' AND user_id = %d', $this->query_vars['user_id'] );
		}

		if ( '' !== $this->query_vars['search'] ) {
			$where .= $this->get_search_sql(
				$this->query_vars['search'],
				array( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_author_IP', 'comment_content' )
			);
		}

		$plucked = wp_array_slice_assoc( $this->query_vars, array( 'post_author', 'post_name', 'post_parent', 'post_status', 'post_type' ) );
		$post_fields = array_filter( $plucked );

		if ( ! empty( $post_fields ) ) {
			$join = "JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID";
			foreach( $post_fields as $field_name => $field_value )
				$where .= $wpdb->prepare( " AND {$wpdb->posts}.{$field_name} = %s", $field_value );
		}

		if ( ! empty( $this->meta_query->queries ) ) {
			$clauses = $this->meta_query->get_sql( 'comment', $wpdb->comments, 'comment_ID', $this );
			$join .= $clauses['join'];
			$where .= $clauses['where'];
			$groupby = "{$wpdb->comments}.comment_ID";
		}

		$date_query = $this->query_vars['date_query'];
		if ( ! empty( $date_query ) && is_array( $date_query ) ) {
			$date_query_object = new WP_Date_Query( $date_query, 'comment_date' );
			$where .= $date_query_object->get_sql();
		}

		$pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits', 'groupby' );
		/**
		 * Filter the comment query clauses.
		 *
		 * @since 3.1.0
		 *
		 * @param array            $pieces A compacted array of comment query clauses.
		 * @param WP_Comment_Query &$this  Current instance of WP_Comment_Query, passed by reference.
		 */
		$clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );

		$fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : '';
		$join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : '';
		$where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : '';
		$orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : '';
		$order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : '';
		$limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : '';
		$groupby = isset( $clauses[ 'groupby' ] ) ? $clauses[ 'groupby' ] : '';

		if ( $groupby ) {
			$groupby = 'GROUP BY ' . $groupby;
		}
		$query = "SELECT $fields FROM $wpdb->comments $join WHERE $where $groupby ORDER BY $orderby $order $limits";

		if ( $this->query_vars['count'] ) {
			return $wpdb->get_var( $query );
		}

		if ( 'ids' == $this->query_vars['fields'] ) {
			$this->comments = $wpdb->get_col( $query );
			return array_map( 'intval', $this->comments );
		}

		$results = $wpdb->get_results( $query );
		/**
		 * Filter the comment query results.
		 *
		 * @since 3.1.0
		 *
		 * @param array            $results  An array of comments.
		 * @param WP_Comment_Query &$this    Current instance of WP_Comment_Query, passed by reference.
		 */
		$comments = apply_filters_ref_array( 'the_comments', array( $results, &$this ) );

		wp_cache_add( $cache_key, $comments, 'comment' );

		return $comments;
	}

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/**

* Execute the query

* @since 3.1.0

* @param string|array $query_vars

* @return int|array

public function query( $query_vars ) {

global $wpdb;

$defaults = array(

'author_email' => '',

'fields' => '',

'ID' => '',

'karma' => '',

'number' => '',

'offset' => '',

'orderby' => '',

'order' => 'DESC',

'parent' => '',

'post_ID' => '',

'post_id' => 0,

'post_author' => '',

'post_name' => '',

'post_parent' => '',

'post_status' => '',

'post_type' => '',

'status' => '',

'type' => '',

'user_id' => '',

'search' => '',

'count' => false,

'meta_key' => '',

'meta_value' => '',

'meta_query' => '',

'date_query' => null, // See WP_Date_Query

);

$groupby = '';

$this->query_vars = wp_parse_args( $query_vars, $defaults );

// Parse meta query

$this->meta_query = new WP_Meta_Query();

$this->meta_query->parse_query_vars( $this->query_vars );

/**

* Fires before comments are retrieved.

* @since 3.1.0

* @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.

do_action_ref_array( 'pre_get_comments', array( &$this ) );

// $args can be whatever, only use the args defined in defaults to compute the key

$key = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $defaults ) ) ) );

$last_changed = wp_cache_get( 'last_changed', 'comment' );

if ( ! $last_changed ) {

$last_changed = microtime();

wp_cache_set( 'last_changed', $last_changed, 'comment' );

}

$cache_key = "get_comments:$key:$last_changed";

if ( $cache = wp_cache_get( $cache_key, 'comment' ) ) {

return $cache;

}

$status = $this->query_vars['status'];

if ( 'hold' == $status ) {

$approved = "comment_approved = '0'";

} elseif ( 'approve' == $status ) {

$approved = "comment_approved = '1'";

} elseif ( ! empty( $status ) && 'all' != $status ) {

$approved = $wpdb->prepare( "comment_approved = %s", $status );

} else {

$approved = "( comment_approved = '0' OR comment_approved = '1' )";

}

$order = ( 'ASC' == strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC';

if ( ! empty( $this->query_vars['orderby'] ) ) {

$ordersby = is_array( $this->query_vars['orderby'] ) ?

$this->query_vars['orderby'] :

preg_split( '/[,\s]/', $this->query_vars['orderby'] );

$allowed_keys = array(

'comment_agent',

'comment_approved',

'comment_author',

'comment_author_email',

'comment_author_IP',

'comment_author_url',

'comment_content',

'comment_date',

'comment_date_gmt',

'comment_ID',

'comment_karma',

'comment_parent',

'comment_post_ID',

'comment_type',

'user_id',

);

if ( ! empty( $this->query_vars['meta_key'] ) ) {

$allowed_keys[] = $this->query_vars['meta_key'];

$allowed_keys[] = 'meta_value';

$allowed_keys[] = 'meta_value_num';

}

$ordersby = array_intersect( $ordersby, $allowed_keys );

foreach ( $ordersby as $key => $value ) {

if ( $value == $this->query_vars['meta_key'] || $value == 'meta_value' ) {

$ordersby[ $key ] = "$wpdb->commentmeta.meta_value";

} elseif ( $value == 'meta_value_num' ) {

$ordersby[ $key ] = "$wpdb->commentmeta.meta_value+0";

}

$orderby = empty( $ordersby ) ? 'comment_date_gmt' : implode(', ', $ordersby);

} else {

$orderby = 'comment_date_gmt';

}

$number = absint( $this->query_vars['number'] );

$offset = absint( $this->query_vars['offset'] );

if ( ! empty( $number ) ) {

if ( $offset ) {

$limits = 'LIMIT ' . $offset . ',' . $number;

} else {

$limits = 'LIMIT ' . $number;

}

} else {

$limits = '';

}

if ( $this->query_vars['count'] ) {

$fields = 'COUNT(*)';

} else {

switch ( strtolower( $this->query_vars['fields'] ) ) {

case 'ids':

$fields = "$wpdb->comments.comment_ID";

break;

default:

$fields = "*";

break;

}

$join = '';

$where = $approved;

$post_id = absint( $this->query_vars['post_id'] );

if ( ! empty( $post_id ) ) {

$where .= $wpdb->prepare( ' AND comment_post_ID = %d', $post_id );

}

if ( '' !== $this->query_vars['author_email'] ) {

$where .= $wpdb->prepare( ' AND comment_author_email = %s', $this->query_vars['author_email'] );

}

if ( '' !== $this->query_vars['karma'] ) {

$where .= $wpdb->prepare( ' AND comment_karma = %d', $this->query_vars['karma'] );

}

if ( 'comment' == $this->query_vars['type'] ) {

$where .= " AND comment_type = ''";

} elseif( 'pings' == $this->query_vars['type'] ) {

$where .= ' AND comment_type IN ("pingback", "trackback")';

} elseif ( ! empty( $this->query_vars['type'] ) ) {

$where .= $wpdb->prepare( ' AND comment_type = %s', $this->query_vars['type'] );

}

if ( '' !== $this->query_vars['parent'] ) {

$where .= $wpdb->prepare( ' AND comment_parent = %d', $this->query_vars['parent'] );

}

if ( is_array( $this->query_vars['user_id'] ) ) {

$where .= ' AND user_id IN (' . implode( ',', array_map( 'absint', $this->query_vars['user_id'] ) ) . ')';

} elseif ( '' !== $this->query_vars['user_id'] ) {

$where .= $wpdb->prepare( ' AND user_id = %d', $this->query_vars['user_id'] );

}

if ( '' !== $this->query_vars['search'] ) {

$where .= $this->get_search_sql(

$this->query_vars['search'],

array( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_author_IP', 'comment_content' )

);

}

$plucked = wp_array_slice_assoc( $this->query_vars, array( 'post_author', 'post_name', 'post_parent', 'post_status', 'post_type' ) );

$post_fields = array_filter( $plucked );

if ( ! empty( $post_fields ) ) {

$join = "JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID";

foreach( $post_fields as $field_name => $field_value )

$where .= $wpdb->prepare( " AND {$wpdb->posts}.{$field_name} = %s", $field_value );

}

if ( ! empty( $this->meta_query->queries ) ) {

$clauses = $this->meta_query->get_sql( 'comment', $wpdb->comments, 'comment_ID', $this );

$join .= $clauses['join'];

$where .= $clauses['where'];

$groupby = "{$wpdb->comments}.comment_ID";

}

$date_query = $this->query_vars['date_query'];

if ( ! empty( $date_query ) && is_array( $date_query ) ) {

$date_query_object = new WP_Date_Query( $date_query, 'comment_date' );

$where .= $date_query_object->get_sql();

}

$pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits', 'groupby' );

/**

* Filter the comment query clauses.

* @since 3.1.0

* @param array $pieces A compacted array of comment query clauses.

* @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.

$clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );

$fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : '';

$join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : '';

$where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : '';

$orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : '';

$order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : '';

$limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : '';

$groupby = isset( $clauses[ 'groupby' ] ) ? $clauses[ 'groupby' ] : '';

if ( $groupby ) {

$groupby = 'GROUP BY ' . $groupby;

}

$query = "SELECT $fields FROM $wpdb->comments $join WHERE $where $groupby ORDER BY $orderby $order $limits";

if ( $this->query_vars['count'] ) {

return $wpdb->get_var( $query );

}

if ( 'ids' == $this->query_vars['fields'] ) {

$this->comments = $wpdb->get_col( $query );

return array_map( 'intval', $this->comments );

}

$results = $wpdb->get_results( $query );

/**

* Filter the comment query results.

* @since 3.1.0

* @param array $results An array of comments.

* @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.

$comments = apply_filters_ref_array( 'the_comments', array( $results, &$this ) );

wp_cache_add( $cache_key, $comments, 'comment' );

return $comments;

}

クラス　WP_Comment_Query::クラス定義終了　

- Wordpress

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WordPressを読む 45-1 /blog/wp-includes/comment.php 1

/blog/wp-includes/comment.php 1

WordPressを読む　45-1 /blog/wp-includes/comment.php 1