php isset tableau

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Felix
30 May 2019
1
2<?php
3
4$a array ('test' => 1'hello' => NULL'pie' => array('a' => 'apple'));
5
6var_dump(isset($a['test']));            // TRUE
7var_dump(isset($a['foo']));             // FALSE
8var_dump(isset($a['hello']));           // FALSE
9
10// The key 'hello' equals NULL so is considered unset
11// If you want to check for NULL key values then try: 
12var_dump(array_key_exists('hello'$a)); // TRUE
13
14// Checking deeper array values
15var_dump(isset($a['pie']['a']));        // TRUE
16var_dump(isset($a['pie']['b']));        // FALSE
17var_dump(isset($a['cake']['a']['b']));  // FALSE
18
19?>
20
21
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php isset tableau