--TEST-- Test strlen() function : error conditions --FILE-- <?php /* Prototype : int strlen ( string $string ) * Description: Get string length * Source code: ext/standard/string.c */ echo "*** Testing strlen() : unexpected number of arguments ***"; echo "\n-- Testing strlen() function with no arguments --\n"; var_dump( strlen() ); echo "\n-- Testing strlen() function with more than expected no. of arguments --\n"; $extra_arg = 10; var_dump( strlen("abc def", $extra_arg) ); ?> ===DONE=== --EXPECTF-- *** Testing strlen() : unexpected number of arguments *** -- Testing strlen() function with no arguments -- Warning: strlen() expects exactly 1 parameter, 0 given in %s on line %d NULL -- Testing strlen() function with more than expected no. of arguments -- Warning: strlen() expects exactly 1 parameter, 2 given in %s on line %d NULL ===DONE===