Question

Here is my code:

function myChmod($path, $permission, $log)
{
    //this is to overcome umask limitations that mkdir adheres to
    $result = chmod($path, octdec($permission));
    if(!$result) {
        $log->log("Error failed to chmod '$path' to '$permission'. Exiting.");
        throw new Exception("Error failed to chmod '$path' to '$permission'. Exiting.");
    }
    return $result;
}

$trml2pdfPath = $c->install_path.'assets/trml2pdf/trml2pdf/trml2pdf.py';
myChmod($trml2pdfPath, 0755, $log);

How do I prevent PHP from changing this base-8 number 0755 to base-10 number 493? I wanna use the chmod function in PHP, but it just keeps changing it to 493.

Answer 1

PHP’s chmod() function takes an integer as second parameter. It does not matter whether you pass octal(0755) or dec(493), it’s the same number.

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myChmod($trml2pdfPath, 0755, $log);
the 0755 here is a number literal. PHP interprets it as the number oct(755)=dec(493), meaning: you don’t need any conversion function in myChmod().

$result = chmod($path, $permission);