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@ 2020-09-10T05:31:06Z

<?php

$fileNamePattern = "/^[a-z0-9\_\-\.\/\\\]+\.php$/i";

var_dump(preg_match($fileNamePattern, ['not a string']));

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

109.49 ms | 2730 KiB | 5 Q