foreach (glob("path/to/files/*.txt") as $filename)
{
$file = file_get_contents($filename);
file_put_contents($filename,preg_replace("/regexhere/","replacement",$file));
}
foreach (glob("path/to/files/*.txt") as $filename)
{
$file = file_get_contents($filename);
file_put_contents($filename,preg_replace("/regexhere/","replacement",$file));
}
