improved utf8_exec with hstart

utf8_exec.php

<?php

function utf8_exec($cmd, &$output = null, &$return = null, $shell = false, $prefix = "")
{
    $cmd = "chcp 65001\r\n$cmd\r\n";
    $tempfile = PATH_APP . "/cache/" . "php_exec$prefix.bat";
    if (!$shell)
        $cmd = preg_replace("/(\\\|\/){1,}/", "\\\\\\", $cmd);
    file_put_contents($tempfile, $cmd);
    $tempfile = realpath($tempfile);
    if (!$shell) {
        exec("CALL \"$tempfile\"", $output, $return);
        $output = array_slice($output, 10);
        @unlink($tempfile);
    } else {
        exec("hstart /NOCONSOLE /HIGH \"$tempfile\"");
    }
}