PHP: Get key from array?

Question

I am sure that this is super easy and built-in function in PHP, but I have yet not seen it.

Here's what I am doing for the moment:

foreach($array as $key => $value) {     echo $key; // Would output "subkey" in the example array     print_r($value); } 

Could I do something like the following instead and thereby save myself from writing "$key => $value" in every foreach loop? (psuedocode)

foreach($array as $subarray) {     echo arrayKey($subarray); // Will output the same as "echo $key" in the former example ("subkey"     print_r($value); } 

Thanks!

The array:

Array (     [subKey] => Array         (             [value] => myvalue         )  ) 

Answer 1

Use the array_search function.

Example from php.net

$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');  $key = array_search('green', $array); // $key = 2; $key = array_search('red', $array);   // $key = 1; 

Answer 2

You can use key():

<?php $array = array(     "one" => 1,     "two" => 2,     "three" => 3,     "four" => 4 );  while($element = current($array)) {     echo key($array)."\n";     next($array); } ?>