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@ 2018-09-02T21:26:45Z

<?php
$_POST = [
    'wind_1' => 'hk',
    'wind_2' => 'pop',
    'wind_25' => 'another'
];

echo substr(array_key_last($_POST), 5);

Output
Performance
VLD
References
Branches

substr: documentation ( source)
array_key_last: documentation ( source)

preferences:dark modelive preview

24.96 ms | 405 KiB | 5 Q