PHP array_key_exists checks whether the key name or index exists in the array. arraykeyexists

PHP array_key_exists checks whether the key name or index exists in the array. arraykeyexists

Array_key_exists ()

The PHP array_key_exists () function is used to check whether the given key name or index exists in the array. If yes, TRUE is returned; otherwise, FALSE is returned.

Syntax:

The bool array_key_exists (mixed key, array search) parameter key is the given key name or index and can be any value that can be used as an array index.

The array_key_exists () function can also be used for objects.

Example:

<? Php $ arr_a = array ('id' => 1, 'name' => "admin"); if (array_key_exists ('name', $ arr_a )) {echo 'key name exists in array $ arr_a';} else {echo 'key name does not exist in array $ arr_a';}?>

The output result is as follows:

The key name exists in the array $ arr_a. The array_key_exists () function returns TRUE for the array element whose value is null. To check whether the array element is null, use isset ().

The above PHP array_key_exists method to check whether the key name or index exists in the array is all the content shared by the editor. I hope to give you a reference and support for the house of friends.