wp-includes/rest-api.php:2686Validates a string value based on a schema.
$valuemixed$argsarray$paramstringtrue|WP_Errorfunction rest_validate_string_value_from_schema( $value, $args, $param ) { if ( ! is_string( $value ) ) { return new WP_Error( 'rest_invalid_type', /* translators: 1: Parameter, 2: Type name. */ sprintf( __( '%1$s is not of type %2$s.' ), $param, 'string' ), array( 'param' => $param ) ); } if ( isset( $args['minLength'] ) && mb_strlen( $value ) < $args['minLength'] ) { return new WP_Error( 'rest_too_short', sprintf( /* translators: 1: Parameter, 2: Number of characters. */ _n( '%1$s must be at least %2$s character long.', '%1$s must be at least %2$s characters long.', $args['minLength'] ), $param, number_format_i18n( $args['minLength'] ) ) ); } if ( isset( $args['maxLength'] ) && mb_strlen( $value ) > $args['maxLength'] ) { return new WP_Error( 'rest_too_long', sprintf( /* translators: 1: Parameter, 2: Number of characters. */ _n( '%1$s must be at most %2$s character long.', '%1$s must be at most %2$s characters long.', $args['maxLength'] ), $param, number_format_i18n( $args['maxLength'] ) ) ); } if ( isset( $args['pattern'] ) && ! rest_validate_json_schema_pattern( $args['pattern'], $value ) ) { return new WP_Error( 'rest_invalid_pattern', /* translators: 1: Parameter, 2: Pattern. */ sprintf( __( '%1$s does not match pattern %2$s.' ), $param, $args['pattern'] ) ); } return true;}Introduced in 5.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.