sanitize_sql_orderby() WP 1.0
Ensures a string is a valid SQL 'order by' clause.
Accepts one or more columns, with or without a sort order (ASC / DESC). e.g. 'column_1', 'column_1, column_2', 'column_1 ASC, column_2 DESC' etc.
Also accepts 'RAND()'.
No Hooks.
Return
String|false. Returns $orderby if valid, false otherwise.
Usage
sanitize_sql_orderby( $orderby );
- $orderby(string) (required)
- Order by clause to be validated.
Changelog
| Since 2.5.1 | Introduced. |
Code of sanitize_sql_orderby() sanitize sql orderby WP 5.8.1
function sanitize_sql_orderby( $orderby ) {
if ( preg_match( '/^\s*(([a-z0-9_]+|`[a-z0-9_]+`)(\s+(ASC|DESC))?\s*(,\s*(?=[a-z0-9_`])|$))+$/i', $orderby ) || preg_match( '/^\s*RAND\(\s*\)\s*$/i', $orderby ) ) {
return $orderby;
}
return false;
}