PHP: How to convert 0777 (an octal) to a string?

Question

I have an octal that I am using to set permissions on a directory.

$permissions = 0777;
mkdir($directory, $permissions, true)

And I want to compare it to a string

$expectedPermissions = '0777'; //must be a string
if ($expectedPermissions != $permissions) {
    //do something
}

What would be the best way to do this comparison?

Answer 1

Why not, in your case, just compare the two numerical values ?

Like this :

if (0777 != $permissions) {
    //do something
}

Still, to convert a value to a string containing the octal representation of a number, you could use sprintf, and the o type specifier.

For example, the following portion of code :

var_dump(sprintf("%04o", 0777));

Will get you :

string(4) "0777"

Answer 2

Do it the other way round: convert the string to a number and compare the numbers:

if (intval($expectedPermissions, 8) != $permissions) { // 8 specifies octal base for conversion
  // do something
}