search and replace php for gettext strings

<?php

$po = file_get_contents("locale/en_GB/LC_MESSAGES/messages.po");

$translations = array(); // german => english
preg_match_all('/msgid "(.+)"\nmsgstr "(.+)"/', $po, $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
    $match[1] = str_replace('\"','"',$match[1]);
    $match[2] = str_replace('\"','"',$match[2]);

    $translations['_(\''. $match[1] . '\''] = '_(\'' . $match[2] . '\'';
    $translations['_("'. $match[1] . '"'] = '_("' . $match[2] . '"';
    $translations['__(\''. $match[1] . '\''] = '__(\'' . $match[2] . '\'';
    $translations['__("'. $match[1] . '"'] = '__("' . $match[2] . '"';
}

$msgidhits = array();

foreach (glob("*.php") as $file) {
    $code = file_get_contents($file);
    foreach($translations AS $msgid => $msgstr) {
        $hits = 0;
        $code = str_replace($msgid,$msgstr,$code,$hits);

        $msgid = str_replace('"',"'",$msgid);
        $msgid = str_replace('__(',"_(",$msgid);
        if(!isset($msgidhits[$msgid])) $msgidhits[$msgid] = $hits;
        else $msgidhits[$msgid] += $hits;
    }
    $code = str_replace(array_keys($translations), array_values($translations), $code);
    //file_put_contents($file, $code);
    echo $code; // be careful to test this first before doing the actual replace (and do use a version control system!)
}

print_r($msgidhits);

echo "nulldrin?";
print_r(array_keys($msgidhits, 0, true));

?>