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@ 2017-06-15T15:56:04Z

<?php
$files = array(
    '123.pdf',
    '123',
    '123.d.pdf',
    );
        foreach($files as $file) {
            $fileBits = explode($file, '.');
            $extension = $fileBits[count($fileBits-1)];
            var_dump($fileBits);
            var_dump($extension);
        }

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
explode: documentation ( source)

preferences:dark modelive preview

70.59 ms | 402 KiB | 5 Q