in_array.php

<?php
//in_array.php
    $t_can_change = array(
        'A','B','C','D'
    );

$b= in_array( 'login_method' , $t_can_change );
var_dump($b);
$t_can_change[]='login_method';
$b= in_array( 'login_method' , $t_can_change );
var_dump($b);
/*
boolean false
boolean true
*/
?>