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@ 2019-08-28T05:42:50Z

<?php
$array =  array
    (
        24 => 24,
        25 => 25,
        26 => 26,
        27 => 27,
        28 => 28,
        29 => 29,
    );
$min = min($array) - 1;
$max = max($array) + 1;
$array[$min] = $min;
$array[$max] = $max;
print_r($array);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
max: documentation ( source)
min: documentation ( source)

preferences:dark modelive previewkey bindings

28.42 ms | 406 KiB | 5 Q