Use 0755 as base-8 number

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 '$permission'. Exiting.开发者_如何学JAVA");
        throw new Exception("Error failed to chmod '$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.

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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);

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From http://docs.php.net/chmod

Note that mode is not automatically assumed to be an octal value, so strings (such as "g+w") will not work properly. To ensure the expected operation, you need to prefix mode with a zero (0):

See this example code in php documentation:

<?php
chmod("/somedir/somefile", 755);   // decimal; probably incorrect
chmod("/somedir/somefile", "u+rwx,go+rx"); // string; incorrect
chmod("/somedir/somefile", 0755);  // octal; correct value of mode
?>

So I guess you need not use base_convert, instead you can directly use the octal number.

This should work for you:

$result = chmod($path, str_pad($permission, 4, '0', STR_PAD_LEFT));

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have a little trick, change :

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

to :

$result = chmod( $path, ( ( "0" . octdec( $permission ) ) * 1 ) );

hope this help.