- var_dump: documentation ( source)
- function_exists: documentation ( source)
<?php
if (!function_exists('in_array')) {
function in_array($needle, $haystack, $strict = false) {
while(list($key, $item) = each($haystack)) {
if ($strict && $needle === $item) {
return true;
} else if($needle == $item) {
return true;
}
}
return false;
}
}
var_dump(in_array(3, array(1,2,'3'), true));