wpdb::check_ascii( string $string )

Checks if a string is ASCII.

Description

The negative regex is faster for non-ASCII strings, as it allows the search to finish as soon as it encounters a non-ASCII character.

Parameters

$string

(string) (Required) String to check.

Return

(bool) True if ASCII, false if not.

Source

File: wp-includes/wp-db.php 

protected function check_ascii( $string ) {
		if ( function_exists( 'mb_check_encoding' ) ) {
			if ( mb_check_encoding( $string, 'ASCII' ) ) {
				return true;
			}
		} elseif ( ! preg_match( '/[^\x00-\x7F]/', $string ) ) {
			return true;
		}

		return false;
	}

Used By

Used By Description
wp-includes/wp-db.php: wpdb::check_safe_collation()

Checks if the query is accessing a collation considered safe on the current version of MySQL.
wp-includes/wp-db.php: wpdb::strip_invalid_text()

Strips any invalid characters based on value/charset pairs.
wp-includes/wp-db.php: wpdb::query()

Performs a MySQL database query, using current database connection.

Changelog

Version Description
4.2.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wpdb/check_ascii