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PHP Code : How to Check If Key Array Is Exist
5:02 PM
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Array
,
Key
,
key exists
,
Open Source
,
PHP Programming
,
Programming
,
Programming Solution
,
Tutorial
Check if key array is exist with function
array_key_exists
Syntax
bool
array_key_exists
(
mixed
$key
,
array
$array
)
array_key_exists()
returns
TRUE
if the given
key
is set in the array.
key
can be any value possible for an array index.
<?php
$search_array
= array(
'first'
=>
null
,
'second'
=>
4
);
// returns false
isset(
$search_array
[
'first'
]);
// returns true
array_key_exists
(
'first'
,
$search_array
);
?>
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TRUEif the givenkeyis set in the array.keycan be any value possible for an array index.<?php
$search_array = array('first' => null, 'second' => 4);
// returns falseisset($search_array['first']);
// returns truearray_key_exists('first', $search_array);?>