--TEST-- Test join() function: error conditions --FILE-- <?php /* Prototype : string join( string $glue, array $pieces ) * Description: Join array elements with a string * Source code: ext/standard/string.c * Alias of function: implode() */ echo "*** Testing join() : error conditions ***\n"; // Zero argument echo "\n-- Testing join() function with Zero arguments --\n"; var_dump( join() ); // More than expected number of arguments echo "\n-- Testing join() function with more than expected no. of arguments --\n"; $glue = 'string_val'; $pieces = array(1, 2); $extra_arg = 10; var_dump( join($glue, $pieces, $extra_arg) ); // Less than expected number of arguments echo "\n-- Testing join() with less than expected no. of arguments --\n"; $glue = 'string_val'; var_dump( join($glue)); echo "Done\n"; ?> --EXPECTF-- *** Testing join() : error conditions *** -- Testing join() function with Zero arguments -- Warning: Wrong parameter count for join() in %s on line %d NULL -- Testing join() function with more than expected no. of arguments -- Warning: Wrong parameter count for join() in %s on line %d NULL -- Testing join() with less than expected no. of arguments -- Warning: join(): Argument must be an array in %s on line %d NULL Done