intval to (int)

<?php

// (c) 2014 Diogo Parrinha
//
// Replaces all intval(...) with (int)(...)
//
// USAGE: intval.php?dir=path_to_dir
// NOTE: Browsing is recursive, meaning that any files inside subfolders will also be altered (if needed).
//
// LICENCE: Just give me credit, that's all I ask for.
// WEBSITE: www.mybb-plugins.com

$dir = $_GET['dir'];

$replacements = 0;
$fixes = 0;
$skipped = 0;

echo "<h2>Starting replacement (intval(...) -> (int)(...)) process...</h2>";

$tabs = '';
while(($msg = browse($dir, $tabs)) === true);

echo $msg;

exit;

function browse($dir, &$tabs)
{
    $tabs .= '+';

    // Directory?
    if (is_dir($dir))
    {
        if ($directory = opendir($dir))
        {
            echo "<br /><strong>$tabs Entering directory $dir</strong>";
            while (($file = readdir($directory)) !== false)
            {
                if($file == '..' || $file == '.')
                    continue;

                if(is_dir($dir.'/'.$file))
                {
                    browse($dir.'/'.$file, $tabs);
                    $tabs = substr_replace($tabs, '', strlen($tabs)-1, 1);
                }
                else
                {
                    if(substr($file, -3, 3) != 'php')
                        continue;

                    fix_file($dir.'/'.$file, $tabs);
                }
            }
            closedir($directory);
        }
    }
    else
        return "Error: $dir is not a directory.";

    global $fixes, $skipped, $replacements;
    return "<br /><br />
    <h3>
    Success. Everything seems to be done.<br />
    Total intval's replaced: $replacements<br />
    Total intval's skipped: $skipped (because of array_map)<br />
    Total intval's fixed: $fixes (because of parse errors)<br />
    </h3>";
}

function fix_file($filepath, $tabs)
{
    echo "<br />$tabs Fixing file $filepath...";
    $fd = fopen($filepath, "r+");
    if($fd == NULL)
    {
        echo "Could not open $filepath for reading.";
        return false;
    }

    $buffer = '';
    $file = '';
    $fixed = false;
    while (($buffer = fgets($fd, 4096)) !== false) {
        while(($pos = strpos($buffer, "intval")) !== false)
        {
            if($buffer[$pos-1] == '\'' || $buffer[$pos+6] == '\'')
            {
                $buffer = substr_replace($buffer, 'INTVAL', $pos, 6);
                global $skipped;
                ++$skipped;
            }
            else
            {
                global $replacements;
                ++$replacements;

                // Remove intval(
                $buffer = substr_replace($buffer, '(int)', $pos, 7);

                // Now we need to remove the ) that closed intval(
                $c = $pos+7;
                $number = 0;
                while(isset($buffer[$c]))
                {
                    if($buffer[$c] == ')' && $number == 0)
                        break;

                    if($buffer[$c] == '(')
                        ++$number;

                    if($buffer[$c] == ')')
                        --$number;

                    ++$c;
                }

                // we don't want to get parse errors due to things like this: ".(int)bla(do_something)+number."
                if(is_numeric($buffer[$c-1]))
                {
                    // insert ( back
                    $buffer = substr_replace($buffer, '(int)(', $pos, 5);

                    global $fixes;
                    ++$fixes;
                }
                else
                {
                    // remove )
                    $buffer = substr_replace($buffer, '', $c, 1);
                }

                $fixed = true;
            }
        }

        $file .= $buffer;
    }

    if (!feof($fd)) {
        echo "Unexpected EOF error.";
        fclose($fd);
        return false;
    }

    fclose($fd);

    if($fixed === true)
    {
        // Open it again but for writing (will erase the file as well)
        $fd = fopen($filepath, "w");
        if($fd == NULL)
        {
            echo "Could not open $filepath for writing.";
            return false;
        }

        fwrite($fd, str_replace('INTVAL', 'intval', $file));
        fclose($fd);

        echo "DONE.";
    }
    else
        echo "nothing to fix.";

    return true;
}

?>