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@ 2015-09-17T10:52:22Z

<?php



    $arr = [
    1,3,1,8,9,7,6,4    
    ];
    
    print_r($arr);
    
    uasort($arr, function($a, $b){
        return abs(3-$a) - abs(3-$b);
    });
    
        print_r($arr);

Output
Performance
VLD
References
Branches

abs: documentation ( source)
uasort: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive preview

34.95 ms | 402 KiB | 5 Q