- var_dump: documentation ( source)
<?php
$expected_array_got_string = 'test';
var_dump($expected_array_got_string['blah']);
var_dump(isset($expected_array_got_string['blah']));
var_dump(isset($expected_array_got_string['jkjk'][0]));
var_dump(isset($expected_array_got_string['jkjk'][0]['test']));
var_dump(isset($expected_array_got_string['jkjk']['test'][1]));
var_dump(isset($expected_array_got_string['jkjk']['test'][0]));