Recursive function

[crashmaster]

Hi there,

I have function, which gets $path to file, if file doesnt exist, it goes 1 level up...

But this function doesnt work. why ??

 

function _path ($path) {

    if (!file_exists($path)) {
        _path('../'.$path);
    } else {
        return $path;
    }

}

[papaface]

_path()

isn't a PHP function.

[crashmaster]

why function doesnt work, even if I change the name of the function!

[lemmin]

You are doing the recursion wrong. For recursion to work, it has to return the return value of the internal call. Your functions are working, but the return value is getting returned to the first call and nothing is done with it. Add the word return to your code and it should work fine:

function _path ($path) {

    if (!file_exists($path)) {
        return _path('../'.$path);
    } else {
        return $path;
    }

}

[Orio]

Forgot a return there...

 

<?php

function _path ($path) {

    if (!file_exists($path)) {
         return _path('../'.$path);
    } else {
        return $path;
    }

}
?>

 

 

Keep in mind that this function (theoretically) will never stop if there's no such file name in the current folder and all the folders above it. You should add a limit.

Example: (No need to change anything in the function call, $call is an optional parameter)

 

<?php

function _path ($path, $calls = 0) {

    $calls ++;
    if($calls > 15)
         return FALSE;
    if (!file_exists($path)) {
         return _path('../'.$path, $calls);
    } else {
        return $path;
    }

}
?>

 

 

Orio.

[papaface]

why function doesnt work, even if I change the name of the function!

lol sorry I didn't realise that was the name of your function.

[crashmaster]

LOL! __ I am author of this topic, But I cannot make it SOLVED.. why ??? Server error ?

[papaface]

The solved mod has been removed I think (for regular users anyway).