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@ 2013-09-16T10:36:27Z

<?php
    function array_uunique($rgData, $fnCompare=null)
    {
        if(!isset($fnCompare))
        {
            return array_unique($rgData);
        }
        if(!is_callable($fnCompare))
        {
            return null;
        }
        if(!count($rgData))
        {
            return array();
        }
        $rgResult = array();
        foreach($rgData as $mItem)
        {
            foreach($rgResult as $mTest)
            {
               if(!call_user_func_array($fnCompare, [$mItem, $mTest]))
               {
                  continue 2;
               }
            }
            $rgResult[]=$mItem;
        }
        return $rgResult;
    }


$rgResult = array_uunique(['foo', 'feo', 'bar', 'baz', 'bee'], function($x, $y)
{
   return levenshtein($x, $y)>1;
});
var_dump($rgResult);

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { [0]=> string(3) "foo" [1]=> string(3) "bar" [2]=> string(3) "bee" }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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