Php isset tableau

<?php

$a = array ('test' => 1, 'hello' => NULL, 'pie' => array('a' => 'apple'));

var_dump(isset($a['test']));            // TRUE
var_dump(isset($a['foo']));             // FALSE
var_dump(isset($a['hello']));           // FALSE

// The key 'hello' equals NULL so is considered unset
// If you want to check for NULL key values then try: 
var_dump(array_key_exists('hello', $a)); // TRUE

// Checking deeper array values
var_dump(isset($a['pie']['a']));        // TRUE
var_dump(isset($a['pie']['b']));        // FALSE
var_dump(isset($a['cake']['a']['b']));  // FALSE

?>

Source: php.net

Similar codes

2 votes296 views1 answer
Laravel force login by id
PHP
0 vote342 views1 answer
Disable cors policy symfony
PHP Symfony
0 vote336 views1 answer
Laravel withValidator
PHP Laravel
40 votes247 views10 answers
Php array append
PHP
1 vote268 views2 answers
Cart::subtotal in laravel
PHP
0 vote286 views10 answers
Event handler with worker laravel
PHP
0 vote280 views1 answer
Php count avec un tableau bidimentionnel
PHP
0 vote286 views2 answers
Php convert month number to name
PHP
6 votes259 views4 answers
Enset laravel session
PHP
1 vote233 views2 answers
Php array data type
PHP