PHP - Function array_key_exists()
Syntax
bool array_key_exists ( $key, $array );
Definition and Usage
It returns TRUE if the given key is set in the array.
Parameters
| Sr.No | Parameter & Description |
|---|---|
| 1 |
key(Required) The key to be searched. |
| 2 |
array(Required) This is an array to be searched |
Return Values
It Returns TRUE if the given key is set in the array otherwise FALSE.
Example
Try out following example −
<?php
$input = array('first' => 10, 'second' => 400);
if (array_key_exists('first', $input)) {
echo "The 'first' element is in the array";
}
?>
This will produce the following result −
The 'first' element is in the array
php_function_reference.htm
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