wp_get_comment_fields_max_lengths(): int[]

Compatibility

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 of maximum lengths keyed by field name.

Performance profile

How much work a call to wp_get_comment_fields_max_lengths() 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

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with how much data it finds.

Instructions

9–25

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 53.

Plugin surface

1 hook

Third-party callbacks on 'wp_get_comment_fields_max_lengths' 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()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_get_comment_fields_max_lengths() can have, taken from its control-flow graph on PHP 8.5.

Hooks and filters fired · 1

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

1. 1
   apply_filters( wp_get_comment_fields_max_lengths )filterline 1249 (+43 into the body)

   Filters the lengths for the comment form fields.

Uses · 2

• is_wp_error()Checks whether the given variable is a WordPress Error.
• apply_filters()Calls the callback functions that have been added to a filter hook.

Used by · 1

• wp_check_comment_data_max_lengths()Compares the lengths of comment data against the maximum character limits.

Source code

View on Trac ↗View on GitHub ↗

1206function wp_get_comment_fields_max_lengths() {1207	global $wpdb;1208 1209	$lengths = array(1210		'comment_author'       => 245,1211		'comment_author_email' => 100,1212		'comment_author_url'   => 200,1213		'comment_content'      => 65525,1214	);1215 1216	if ( $wpdb->is_mysql ) {1217		foreach ( $lengths as $column => $length ) {1218			$col_length = $wpdb->get_col_length( $wpdb->comments, $column );1219			$max_length = 0;1220 1221			// No point if we can't get the DB column lengths.1222			if ( is_wp_error( $col_length ) ) {1223				break;1224			}1225 1226			if ( ! is_array( $col_length ) && (int) $col_length > 0 ) {1227				$max_length = (int) $col_length;1228			} elseif ( is_array( $col_length ) && isset( $col_length['length'] ) && (int) $col_length['length'] > 0 ) {1229				$max_length = (int) $col_length['length'];1230 1231				if ( ! empty( $col_length['type'] ) && 'byte' === $col_length['type'] ) {1232					$max_length = $max_length - 10;1233				}1234			}1235 1236			if ( $max_length > 0 ) {1237				$lengths[ $column ] = $max_length;1238			}1239		}1240	}1241 1242	/**1243	 * Filters the lengths for the comment form fields.1244	 *1245	 * @since 4.5.01246	 *1247	 * @param int[] $lengths Array of maximum lengths keyed by field name.1248	 */1249	return apply_filters( 'wp_get_comment_fields_max_lengths', $lengths );1250}

Changelog

Introduced in 4.5.0. 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.

About this page

Parsed data

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

Corrections

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