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PHP Function array_key_exists()
Syntax
bool array_key_exists ( $key, $array );
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Definition and Usage
Returns TRUE if the given key is set in the array. key can be any value possible for an array index.
Paramters
Parameter | Description |
key | Required. Key to be searched. |
array | Required. Array to be searched |
Return Values
Returns TRUE if the given key is set in the array otherwise FALSE.
Example
Try out following example:
<?php
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
echo "The 'first' element is in the array";
}
?>
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This will produce following result:
The 'first' element is in the array
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