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WordPress

WP_Comment_Query::get_comment_ids(): int|array

Since
4.4.0, 6.9.0
Source
wp-includes/class-wp-comment-query.php:545
Used internally to get a list of comment IDs matching the query vars.

Compatibility

WordPress
since 6.9.0
PHP
7.4–8.6-dev
  • 6.7.7
  • 6.8.8
  • 6.9.7
  • 7.0.4
  • 7.1.0

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Return value

int|array
A single count of comment IDs if a count query. An array of comment IDs if a full query.

Performance profile

How much work a call to WP_Comment_Query::get_comment_ids() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class
Heavy

Reaches the database via ->get_var().

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
289–303

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 954.

Plugin surface
1 hook

Third-party callbacks on 'comments_clauses' run inside this call, and their cost is not bounded by anything here.

Called by
1

1 place in core call this, so the cost is paid more often than your own code shows.

What it touches

  • hookthird-party callbacksapply_filters_ref_array()called directly
  • sqldatabase query->get_var()called directly

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Comment_Query::get_comment_ids() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
!empty($statuses) && $statuses && empty($value) && empty($approved_clauses) && empty($number) && empty($post_id) && $parent === "" && !isset($value) && empty($post_fields) && !$clauses289–299wp_parse_list(), strtoupper(), absint(), absint(), absint(), absint(), array_merge(), wp_array_slice_assoc(), array_filter(), compact(), ->get_var()
!empty($statuses) && $statuses && empty($value) && empty($approved_clauses) && empty($number) && empty($post_id) && $parent === "" && !isset($value) && empty($post_fields) && !$clauses293–303wp_parse_list(), strtoupper(), absint(), absint(), absint(), absint(), array_merge(), wp_array_slice_assoc(), array_filter(), compact(), ->get_col(), array_map()

This body has more branch combinations than are worth enumerating, so the table covers the outcomes found first rather than every one that exists.

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev953289–3031021 fewer instruction than PHP 8.5
8.5954289–303102
8.4954289–30310289 fewer instructions than PHP 8.3
8.31043301–315102
8.21043301–3151022 more instructions than PHP 8.1
8.11041301–3151021 fewer instruction than PHP 7.4
7.41042301–315102

An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.

Hooks and filters fired · 1

One hook fires while WP_Comment_Query::get_comment_ids() runs, in this order:

  1. apply_filters( comments_clauses )filterline 950 (+405 into the body)

    Filters the comment query clauses.

Uses · 10

Used by · 1

Source code

	protected function get_comment_ids() {		global $wpdb; 		// Assemble clauses related to 'comment_approved'.		$approved_clauses = array(); 		// 'status' accepts an array or a comma-separated string.		$status_clauses = array();		$statuses       = wp_parse_list( $this->query_vars['status'] ); 		// Empty 'status' should be interpreted as 'all'.		if ( empty( $statuses ) ) {			$statuses = array( 'all' );		} 		// 'any' overrides other statuses.		if ( ! in_array( 'any', $statuses, true ) ) {			foreach ( $statuses as $status ) {				switch ( $status ) {					case 'hold':						$status_clauses[] = "comment_approved = '0'";						break; 					case 'approve':						$status_clauses[] = "comment_approved = '1'";						break; 					case 'all':					case '':						$status_clauses[] = "( comment_approved = '0' OR comment_approved = '1' )";						break; 					default:						$status_clauses[] = $wpdb->prepare( 'comment_approved = %s', $status );						break;				}			} 			$approved_clauses[] = '( ' . implode( ' OR ', $status_clauses ) . ' )';		} 		// User IDs or emails whose unapproved comments are included, regardless of $status.		if ( ! empty( $this->query_vars['include_unapproved'] ) ) {			$include_unapproved = wp_parse_list( $this->query_vars['include_unapproved'] ); 			foreach ( $include_unapproved as $unapproved_identifier ) {				// Numeric values are assumed to be user IDs.				if ( is_numeric( $unapproved_identifier ) ) {					$approved_clauses[] = $wpdb->prepare( "( user_id = %d AND comment_approved = '0' )", $unapproved_identifier );				} else {					// Otherwise we match against email addresses.					if ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) {						// Only include requested comment.						$approved_clauses[] = $wpdb->prepare( "( comment_author_email = %s AND comment_approved = '0' AND {$wpdb->comments}.comment_ID = %d )", $unapproved_identifier, (int) $_GET['unapproved'] );					} else {						// Include all of the author's unapproved comments.						$approved_clauses[] = $wpdb->prepare( "( comment_author_email = %s AND comment_approved = '0' )", $unapproved_identifier );					}				}			}		} 		// Collapse comment_approved clauses into a single OR-separated clause.		if ( ! empty( $approved_clauses ) ) {			if ( 1 === count( $approved_clauses ) ) {				$this->sql_clauses['where']['approved'] = $approved_clauses[0];			} else {				$this->sql_clauses['where']['approved'] = '( ' . implode( ' OR ', $approved_clauses ) . ' )';			}		} 		$order = ( 'ASC' === strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC'; 		// Disable ORDER BY with 'none', an empty array, or boolean false.		if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) {			$orderby = '';		} elseif ( ! empty( $this->query_vars['orderby'] ) ) {			$ordersby = is_array( $this->query_vars['orderby'] ) ?				$this->query_vars['orderby'] :				preg_split( '/[,\s]/', $this->query_vars['orderby'] );

Changelog

Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

6.9.0
Excludes the 'note' comment type, unless 'all' or the 'note' types are requested.from the docblock
4.4.0
Introduced.from the docblock

About this page

Parsed data
Generated from the wordpress-develop 7.0.4 tag, from src/wp-includes/class-wp-comment-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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