array_(blacklist|whitelist)(_assoc).php

if(!function_exists('array_blacklist_assoc')){

    /**
     * Returns an array containing all the entries from array1 whose keys are not present in any of the other arrays when using their values as keys.
     * @param array $array1 The array to compare from
     * @param array $array2 The array to compare against
     * @return array $array2,... More arrays to compare against
     */

    function array_blacklist_assoc(Array $array1, Array $array2) {
        if(func_num_args() > 2){
            $args = func_get_args();
            array_shift($args);
            $array2 = call_user_func_array('array_merge', $args);
        } 
        return array_diff_key($array1, array_flip($array2));
    }
}
if(!function_exists('array_blacklist')){

    /**
     * Returns an array containing all the entries from array1 that are not present in any of the other arrays.
     *
     * @param array The array to compare from
     * @param array $array2 An array to compare against its values.
     * @param array $array2,... More arrays to compare against
     * @return array 
     */

    function array_blacklist(Array $array1, Array $array2) {
        if(func_num_args() > 2){
            $args = func_get_args();
            return call_user_func_array('array_diff', $args);
        } else {
            return array_diff($array1, $array2); 
        }
    }
}


if(!function_exists('array_whitelist_assoc')){

    /**
     * Returns an associative array containing all the entries of array1 which have keys that are present in all the arguments when using their values as keys.
     *
     * @param array $array The array with master keys to check.
     * @param array $array2 An array to compare keys against its values.
     * @return array $array2,... A variable list of arrays to compare.
     * 
     */

    function array_whitelist_assoc(Array $array1, Array $array2) {

        if(func_num_args() > 2){
            $args = func_get_args();
            array_shift($args);
            $array2 = call_user_func_array('array_merge', $args);
        } 
        return array_intersect_key($array1, array_flip($array2)); 
    }
}



if(!function_exists('array_whitelist')){

    /**
     * Returns an array containing all of the values in array1 whose values exist in all of the parameters.
     *
     * @param array $array1 The array with master values to check.
     * @param array $array2 An array to compare values against.
     * @param array $array2,... A variable list of arrays to compare.
     * @return array 
     */

    function array_whitelist(Array $array1, Array $array2) {

        if(func_num_args() > 2){
            $args = func_get_args();
            array_shift($args);
            $array2 = call_user_func_array('array_merge', $args);
        } 
        return array_intersect($array1, $array2); 
    }
}




$numeric_array = ['one','two','three','four','a','b'];

$assoc_array = ['one' =>'val1','two'=>'val2','three'=>'val3','four'=>'val4', 'a' =>'val5','b'=>'val6'];

$whitelist1 = ['one','two','three'];

$whitelist2 = ['two','four','six','eight','ten'];

$blacklist1 = ['a','b','c','d','e'];

$blacklist2 = ['a','e','i','o','u'];


var_dump(array_whitelist($numeric_array, $whitelist1));

var_dump(array_whitelist($numeric_array, $whitelist1, $whitelist2));


var_dump(array_blacklist($numeric_array, $blacklist1));

var_dump(array_blacklist($numeric_array, $blacklist1, $blacklist2));


var_dump(array_whitelist_assoc($assoc_array, $whitelist1));

var_dump(array_whitelist_assoc($assoc_array, $whitelist1, $whitelist2));


var_dump(array_blacklist_assoc($assoc_array, $blacklist1));

var_dump(array_blacklist_assoc($assoc_array, $blacklist1, $blacklist2));