Execute php script in background

background-script.php

function execInBackground($cmd){
    if (substr(php_uname(), 0, 7) == "Windows"){ 
        pclose(popen("start /B ". $cmd, "r"));  
    }else{ 
        exec($cmd . " > /dev/null &");   
    } 
} 

// Pass parameter if you need
//$second_param = 1;
//execInBackground('php E:/aziz/xampp/htdocs/dompdf-example/index.php db_name '.$second_param);
execInBackground('php E:/aziz/xampp/htdocs/dompdf-example/index.php ');