I have array:
$arr = array(
'a' => 1,
'b' => 2,
'c' => 3
);
Is there built-in php function which gets array value by key and then removes element from this array?
I know array_shift and array_pop functions, but I need to get element by custom key, not first/last element. Something like:
$arr; // 'a'=>1, 'b'=>2, 'c'=>3
$elem = array_shift_key($arr, 'b');
echo $elem; // 2
$arr; // 'a'=>1, 'c'=>3
Not sure about native way, but this should work:
function shiftByKey($key, &$array) {
if (!array_key_exists($key, $array)) {
return false;
}
$tmp = $array[$key];
unset($array[$key]);
return $tmp;
}
Edit: Updated it so that array is passed by reference. Else your array stays the same.
As far as I'm aware there's nothing that comes close to that. Can be written easily though:
function array_shift_key(array &$array, $key) {
$value = $array[$key];
unset($array[$key]);
return $value;
}
If you care, validate first whether the key exists in the array and do something according to your error handling philosophy if it doesn't. Otherwise you'll simply get a standard PHP notice for non-existing keys.
function array_shift_key(array &$input, $key) {
$value = null;
// Probably key presents with null value
if (isset($input[$key]) || array_key_exists($key, $input)) {
$value = $input[$key];
unset($input[$key]);
}
return $value;
}
