Return all array elements except for a given key

Simple one, I was just wondering if there is a clean and eloquent way of returning all values from an associative array that do not match a given key(s)?

$array = array('alpha' => 'apple', 'beta' => 'banana', 'gamma' => 'guava');

$alphaAndGamma = arrayExclude($array, array('alpha'));
$onlyBeta      = arrayExclude($array, array('alpha', 'gamma'));

function arrayExclude($array, Array $excludeKeys){
    foreach($array as $key => $valu开发者_开发技巧e){
        if(!in_array($key, $excludeKeys)){
            $return[$key] = $value;
        }
    }
    return $return;
}

This is what I'm (going to be) using, however, are there cleaner implementations, something I missed in the manual perhaps?

Although, this question is too old and there are several answer are there for this question, but I am posting a solution that might be useful to someone.

You may get the all array elements from provided input except the certain keys you've defined to exclude using:

$result = array_diff_key($input, array_flip(["SomeKey1", "SomeKey2", "SomeKey3"]));

This will exclude the elements from $input array having keys SomeKey1, SomeKey2 and SomeKey3 and return all others into $result variable.

You could just unset the value:

$alphaAndGamma = $array;
unset($alphaAndGamma['alpha']);

Edit: Made it clearer. You can copy an array by assigning it to another variable.

or in a function:

function arrayExclude($array, Array $excludeKeys){
    foreach($excludeKeys as $key){
        unset($array[$key]);
    }
    return $array;
}

Use array_diff_key():

$array = array('alpha' => 'apple', 'beta' => 'banana', 'gamma' => 'guava');

$alphaAndGamma = array_diff_key($array, array('alpha'=>0));
$onlyBeta      = array_diff_key($array, array('alpha'=>0, 'gamma'=>0));

EDIT: I added =>0s.

if you wanted Laravel way, The Arr::except method removes the given key / value pairs from an array:

use Illuminate\Support\Arr;

$array = ['name' => 'Desk', 'price' => 100];

$filtered = Arr::except($array, ['price']);

// ['name' => 'Desk']

@source https://laravel.com/docs/8.x/helpers#method-array-except

Simple function here, using two arrays, the actual array and an array of keys that should be excluded. Could also easily be made into a one liner if we exclude the function.

function array_except(array $array,array $except) {

 return array_filter($array,fn($key) => !in_array($key,$except),ARRAY_FILTER_USE_KEY);

}

$alphaAndGamma = $array;
unset($alphaAndGamma['alpha']);

$onlyBeta = $array;
unset($onlyBeta['alpha'], $onlyBeta['gamma']);

There have been a few discussions about speed when using in_array. From what I've read, including this comment1, using isset is faster than in_array.

In that case your code would be:

function arrayExclude($array, array $excludeKeys){

    $return = [];

    foreach($array as $key => $value){
        if(!isset($excludeKeys[$key])){
            $return[$key] = $value;
        }
    }
    return $return;
}

That would be slightly faster, and may help in the event that you're needing to process large datasets.

You can easily remove an array item by its key using this..

unset($array['key']); 

DEMO http://codepad.org/EA9vTwzR

array_diff_assoc could help. So i.e. you could use

$onlyBeta = array_diff_assoc($array, array('alpha', 'gamma'))