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digicodehudigicodehu
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- print send
1 parent 97d6b62 commit 0ef2d38

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3 files changed

+181
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‎print_send.php

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<?php
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/*
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* Class Print_send - Abstract printing class.
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* Models the actual sending of data to the printer.
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*/
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abstract class Print_send{
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protected $data;
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protected $debug;
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abstract protected function print_job($queue);
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abstract protected function interpret();
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public function __construct(){}
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public function set_data($data){
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//This can be a filename or some ASCII. A file check should be made in derived classes.
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$this->data = $data;
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$this->debug .= "Data set\n";
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}
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//Future functionality (?) Could create filters with this for different languages like PCL or ESC/P
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public static function printer_factory($type){
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if (include_once 'drivers/' . $type . '.php') {
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return new $type; // Return a new instance of a printer driver of type $type.
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} else {
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throw new Exception('Driver not found: $type');
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}
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}
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public function get_debug(){
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return $this->debug;
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}
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}

‎print_send_lpr.php

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<?php
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/*
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* Class Print_send_lpr - Sends a file to be printed remotely.
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* File must be either preformatted or plain ASCII until some
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* printer driver functionality has been incorpoated.
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*/
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class Print_send_lpr extends Print_send{
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private $host = "192.168.1.1";
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private $port = "6001";
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private $timeout = "5";
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private $err_no;
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private $err_str;
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public function __construct() {
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parent::__construct();
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}
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public function set_port($port){
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$this->port = $port;
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$this->debug .= "Port is ".$this->port."\n";
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}
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public function set_host($host){
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$this->host = $host;
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$this->debug .= "Host is ".$this->host."\n";
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}
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public function set_timeout($timeout){
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$this->timeout = $timeout;
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}
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public function get_err_no(){
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return $this->err_no;
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}
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public function get_err_str(){
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return $this->err_str;
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}
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public function print_job($queue){
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//Private static function prints waiting jobs on the queue.
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$this->print_waiting($queue);
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//Open a new connection to send the control file and data.
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$stream = stream_socket_client("tcp://".$this->host.":".$this->port, $this->err_no, $this->err_str, $this->timeout);
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if(!$stream){
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return $this->err_no." (".$this->err_str.")";
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} else {
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$job = self::get_job_id(); // Get a new id for this job
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//Set printer to receive file
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fwrite($stream, chr(2).$queue."\n");
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$this->debug .= "Confirmation of receive cmd: ".ord(fread($stream, 1))."\n";
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//Send Control file.
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(isset($_SERVER['SERVER_NAME'])) ? $server = $_SERVER['SERVER_NAME'] : $server = "me";//Might be CLI and not have _SERVER
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$ctrl = "H".$server."\nPphp\nfdfA".$job.$server."\n";
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fwrite($stream, chr(2).strlen($ctrl)." cfA".$job.$server."\n");
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$this->debug .= "Confirmation of sending of control file cmd: ".ord(fread($stream, 1))."\n";
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fwrite($stream, $ctrl.chr(0)); //Write null to indicate end of stream
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$this->debug .= "Confirmation of sending of control file itself: ".ord(fread($stream, 1))."\n";
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if (is_readable($this->data)){
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// It's a filename, rather than just some ascii text that needs printing. Open and stream.
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if (strstr(strtolower($_ENV["OS"]), "windows")){
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$this->debug .= "Operating system is Windows\n";
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$data = fopen($this->data, "rb"); // Force binary in Windows.
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} else {
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$this->debug .= "Operating system is not Windows\n";
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$data = fopen($this->data, "r");
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}
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fwrite($stream, chr(3).filesize($this->data)." dfA".$job.$server."\n");
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$this->debug .= "Confirmation of sending receive data cmd: ".ord(fread($stream, 1))."\n";
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while(!feof($data)){
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fwrite($stream, fread($data, 8192));
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}
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fwrite($stream, chr(0)); // Write null to indicate end of stream
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$this->debug .= "Confirmation of sending data: ".ord(fread($stream, 1))."\n";
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fclose($data);
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} else {
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//Send data string
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fwrite($stream, chr(3).strlen($this->data)." dfA".$job.$server."\n");
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$this->debug .= "Confirmation of sending receive data cmd:".ord(fread($stream, 1))."\n";
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fwrite($stream, $this->data.chr(0)); //Write null to indicate end of stream
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$this->debug .= "Confirmation of sending data:".ord(fread($stream, 1))."\n";
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}
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}
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}
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//Placeholder to handle filters - this will call methods in printer driver classes
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//instantiated by the printer_factory method..
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public function interpret(){}
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private function get_job_id(){
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return "001";
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//You should implement your own internal storage and incrementing of job numbers here.
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//This might be a database value, or some file on the file system.
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}
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private function print_waiting($queue){
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$stream = stream_socket_client("tcp://".$this->host.":".$this->port, $this->err_no, $this->err_str, $this->timeout);
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if (!$stream){
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return $this->err_no." (".$this->err_str.")";
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} else {
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//Print any waiting jobs
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fwrite($stream, $queue."\n");
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$this->debug .= "Confirmation of print waiting jobs cmd:";
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//while(!feof($stream)){
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//$this->debug .= ord(fread($stream, 1));
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//}
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fclose($stream);
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$this->debug .= "\n";
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}
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}
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}

‎test.php

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<?php
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error_reporting(E_ALL);
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include_once("print_send.php");
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include_once("print_send_lpr.php");
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$text = "Hello world!"; // zpl/epl/ipl/gpl formatted label view
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$lpr = new Print_send_lpr();
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$lpr->set_port("6001");
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$lpr->set_host("192.168.1.1");
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$lpr->set_data($text);
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$lpr->print_job("Queue 1");
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$lpr->get_debug();

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