Asynchronous PHP call which runs a controller method

Based on this thread I made this for my codeigniter project. It works just fine. You can have any function processed in the background.

A controller that accepts the async calls.

class Daemon extends CI_Controller{    // Remember to disable CI's csrf-checks for this controller    function index( )    {        ignore_user_abort( 1 );        try        {            if ( strcmp( $_SERVER['REMOTE_ADDR'], $_SERVER['SERVER_ADDR'] ) != 0 && !in_array( $_SERVER['REMOTE_ADDR'], $this->config->item( 'proxy_ips' ) ) )            {                log_message( "error", "Daemon called from untrusted IP-address: " . $_SERVER['REMOTE_ADDR'] );                show_404( '/daemon' );                return;            }            $this->load->library( 'encrypt' );            $params = unserialize( urldecode( $this->encrypt->decode( $_POST['data'] ) ) );            unset( $_POST );            $model = array_shift( $params );            $method = array_shift( $params );            $this->load->model( $model );            if ( call_user_func_array( array( $this->$model, $method ), $params ) === FALSE )            {                log_message( "error", "Daemon could not call: " . $model . "::" . $method . "()" );            }        }        catch(Exception $e)        {            log_message( "error", "Daemon has error: " . $e->getMessage( ) . $e->getFile( ) . $e->getLine( ) );        }    }}

And a library that does the async calls

class Daemon{    public function execute_background( /* model, method, params */ )    {        $ci = &get_instance( );        // The callback URL (its ourselves)        $parts = parse_url( $ci->config->item( 'base_url' ) . "/daemon" );        if ( strcmp( $parts['scheme'], 'https' ) == 0 )        {            $port = 443;            $host = "ssl://" . $parts['host'];        }        else         {            $port = 80;            $host = $parts['host'];        }        if ( ( $fp = fsockopen( $host, isset( $parts['port'] ) ? $parts['port'] : $port, $errno, $errstr, 30 ) ) === FALSE )        {            throw new Exception( "Internal server error: background process could not be started" );        }        $ci->load->library( 'encrypt' );        $post_string = "data=" . urlencode( $ci->encrypt->encode( serialize( func_get_args( ) ) ) );        $out = "POST " . $parts['path'] . " HTTP/1.1\r\n";        $out .= "Host: " . $host . "\r\n";        $out .= "Content-Type: application/x-www-form-urlencoded\r\n";        $out .= "Content-Length: " . strlen( $post_string ) . "\r\n";        $out .= "Connection: Close\r\n\r\n";        $out .= $post_string;        fwrite( $fp, $out );        fclose( $fp );    }}

This method can be called to process any model::method() in the 'background'. It uses variable arguments.

$this->load->library('daemon');$this->daemon->execute_background( 'model', 'method', $arg1, $arg2, ... );

You can write in socket:

$fp = fsockopen($_SERVER['HTTP_HOST'], 80, $errno, $errstr, 30);$data = http_build_query($params, '', '&'); //$params - array with POST datafwrite($fp, "POST " . ('/controller/action') . " HTTP/1.1\r\n");fwrite($fp, "Host: ".$_SERVER['HTTP_HOST']."\r\n");fwrite($fp, "Content-Type: application/x-www-form-urlencoded\r\n");fwrite($fp, "Content-Length: " . strlen($data) . "\r\n");fwrite($fp, "Connection: Close\r\n\r\n");fwrite($fp, $data);fclose($fp);