- var_dump: documentation ( source)
- strcmp: documentation ( source)
<?php
$a = array('1','2','3');
var_dump(strcmp("test",$a) == 0);
var_dump( is_null(strcmp("test",$a)) );
function Test() {return;}
$null = Test();
var_dump(is_null($null));
$s = (string) array();
var_dump($s);