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@ 2020-01-22T15:23:47Z

<?php

$args = array(
    'a' => array(
        'zebra' => 1,
    ),
    'b' => array(
        'zebra' => 0,
    ),
    'c' => array(
        'zebra' => 0,
    ),
    'd' => array(
        'zebra' => 0,
    ),
    'e' => array(
        'zebra' => 1,
    ),
);

$zeros = [];
$ones = [];

foreach($args as $let=>$arg){
    if ($arg['zebra'] === 1) {
        $ones[] = $let;
    } else if ($arg['zebra'] === 0) {
        $zeros[] = $let;
    }
}

$res = [];
if(abs(count($zeros) - count($ones)) === 1) { 
    if (count($ones) > count($zeros)){
        foreach($zeros as $ind=>$let){ 
            $res[$ones[$ind]] = ['zebra' => 1];
            $res[$let]        = ['zebra' => 0];  
            $tmp = $ind;
        } 
        $res[$ones[$tmp+1]] = ['zebra' => 1];
    } else if (count($ones) < count($zeros)){
        foreach($ones as $ind=>$let){ 
            $res[$zeros[$ind]] = ['zebra' => 0];
            $res[$let]        = ['zebra' => 1];  
            $tmp = $ind;
        } 
        $res[$zeros[$tmp+1]] = ['zebra' => 0];
    }
}

print_r($res);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [b] => Array ( [zebra] => 0 ) [a] => Array ( [zebra] => 1 ) [c] => Array ( [zebra] => 0 ) [e] => Array ( [zebra] => 1 ) [d] => Array ( [zebra] => 0 ) )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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