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@ 2014-01-10T03:05:23Z

<?php
function position_merge(array $arr1,array $arr2)
{
    $result=array_merge($arr1,$arr2);
    array_walk($result,function(&$item,$idx){
        $item["array_index"]=$idx;// Make sure this key is not used
    });
    usort($result,function($a,$b){
        return $a["position"]-$b["position"]?:$a["array_index"]-$b["array_index"];
    });
    array_walk($result,function(&$item){
        unset($item["array_index"]);
    });
    return $result;
}
$array1 = array(
    array('name' => 'Bob', 'position' => 1),
    array('name' => 'Tim', 'position' => 1),
    array('name' => 'Alf', 'position' => 3),
    array('name' => 'Jon', 'position' => 3) 
);

$array2 = array(
    array('name' => 'Tom', 'position' => 2),
    array('name' => 'Joe', 'position' => 2),
    array('name' => 'Jim', 'position' => 2),
    array('name' => 'Kev', 'position' => 2)
);
print_r(position_merge($array1,$array2));

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [name] => Bob [position] => 1 ) [1] => Array ( [name] => Tim [position] => 1 ) [2] => Array ( [name] => Tom [position] => 2 ) [3] => Array ( [name] => Joe [position] => 2 ) [4] => Array ( [name] => Jim [position] => 2 ) [5] => Array ( [name] => Kev [position] => 2 ) [6] => Array ( [name] => Alf [position] => 3 ) [7] => Array ( [name] => Jon [position] => 3 ) )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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