CXVI. Funzioni per le Stampanti

Introduzione

Queste funzioni sono disponibili solo nei sistemi Windows 9.x, ME, NT4 e 2000. Sono state aggiunte in PHP 4.0.4.

Installazione

Questo modulo PECL non viene incluso nel rilascio di PHP.

Per potere utilizzare queste funzioni, gli utenti Windows dovranno abilitare php_printer.dll nel php.ini. You may obtain this unbundled PECL extension from the various PECL snaps pages (select the appropriate repository for your version of PHP): PECL for PHP 4.3.x, PECL for PHP 5.0.x or PECL Unstable.

Configurazione di Runtime

Il comportamento di queste funzioni è influenzato dalle impostazioni di php.ini.

Tabella 1. Parametri di configurazione per il modulo stampante

Nome	Default	Modificabile	Variazioni
printer.default_printer	""	PHP_INI_ALL

Per maggiori dettagli sulle costanti PHP_INI_* vedere Appendice G.

Sommario
printer_abort -- Cancella il file di spool dalla stampante
printer_close -- Chiude una connessione aperta verso una stampante
printer_create_brush -- Crea un nuovo pennello
printer_create_dc -- Crea un nuovo device context
printer_create_font -- Crea un nuovo font
printer_create_pen -- Crea una nuova penna
printer_delete_brush -- Cancella un pennello
printer_delete_dc -- Cancella un device context
printer_delete_font -- Cancella un font
printer_delete_pen -- Cancella una penna
printer_draw_bmp -- Disegna una bitmap
printer_draw_chord -- Traccia una corda
printer_draw_elipse -- Traccia una ellisse
printer_draw_line -- Traccia una linea
printer_draw_pie -- Traccia una grafico a torta
printer_draw_rectangle -- Traccia un rettangolo
printer_draw_roundrect -- Traccia un rettangolo con gli angoli arrotondati
printer_draw_text -- Scrive un testo
printer_end_doc -- Chiude il documento
printer_end_page -- Chiude la pagina attiva
printer_get_option -- Recupera la configurazione della stampante
printer_list -- Restituisce un elenco delle stampanti collegate al server
printer_logical_fontheight -- Restituisce l'altezza logica del font
printer_open -- Apre la connessione ad una stampante
printer_select_brush -- Seleziona un pennello
printer_select_font -- Seleziona un font
printer_select_pen -- Seleziona una penna
printer_set_option -- Configura la connessione con la stampante
printer_start_doc -- Inizia un nuovo documento
printer_start_page -- Inizia una nuova pagina
printer_write -- Scrive dei dati sulla stampante

printer_abort

PDO_PGSQL DSN

Last updated: Wed, 26 Oct 2005

add a note User Contributed Notes
Funzioni per le Stampanti

extremesanity
30-May-2007 01:35


I have gotten very reliable printing using this set of functions coupled with Windows 2000, IIS, the PECL extension, and the php_printer.dll.



Basically I have a linux web server that sends a request to the windows 2000 IIS web server (acting as the role of print server) sending the information to be printed in the query string.



I use this primarily for printing barcoded labels, where the barcode itself is a barcode font found on the web.  



I got terrible reliability out of all versions of apache running on windows 2000 and xp.

mdwyer at timestreamtech dot com
24-Jan-2007 03:06


I was able to print nice looking reports (under unix) by sending out formatted text out through 'enscript'.  The various configuration options on enscript took care of fonts and headers etc.  The result was a postscript file which I just sent to the server's local printer.



One could also pipe it through a PS to PDF filter and send it back to the user, I suppose.



For another job, I learned how to write postscript and just wrote directly to postscript files.  Learning how to write postscript is probably only marginally harder than learning how to use this API, and is probably more portable.

arne dot briesenick at soxabo dot de
28-Sep-2004 07:42


Printing in UN*X is possible too:



<?php

function lpr($STR,$PRN) {

  $prn=(isset($PRN) && strlen($PRN))?"$PRN":C_DEFAULTPRN ;

  $CMDLINE="lpr -P $prn ";

  $pipe=popen("$CMDLINE" , 'w' );

  if (!$pipe) {print "pipe failed."; return ""; }

  fputs($pipe,$STR);

  pclose($pipe);

} // lpr()

?>



You pipe the stream/string/char/sign whatever to the system. In the example shown above you have to add at least the string for printing in the function call. The second arg is a printer name which if you don't set will be set to the C_DEFAULTPRN. This is a constant definition from an ini file.



Hope this will help to save a lot of time ;-)

jason at matteson dot com
11-Mar-2004 03:01


You can print in XP. AND, you can print to a shared printer with XP. The drivers for the printer MUST be installed on ther server as well as on the computer you wish to print with. Also, the printer must be shared on the client computer.



I am using a Zebra LP2844 Thermal Barcode Printer in my application. I am running XP Pro,Apache 1.3.27, PHP 4.3+.



Here is a function I use in our churches checkin system.  I use this to print directly to our printer with out having to use any Javascript.



First, i give the function the name of the shared printer. 



Second, I get the client computers host name. You could use just REMOTE_ADDR too I suppose.



Then I return a correctly formatted Windows path to the shared printer for the 



function getPrinter($SharedPrinterName) {

    global $REMOTE_ADDR;

    $host  =  getHostByAddr($REMOTE_ADDR);

    return "\\\\".$host."\\".$SharedPrinterName;

}



$handle  =  printer_open(getPrinter("Eltron"));



So, as long as you KNOW the computers are suppose to have a shared printer called "Eltron", you're all set to start sending info to the printer with the other Printer functions.



-j

macagomez at yahoo dot com
27-Jul-2003 02:35


Please notice that what is printed is NOT measured in pixels, it is measured in pronter's dots.

Apply to fonts, coordinates and bit maps.

jwlash at acm dot org
19-Feb-2003 11:40


I have noticed the for unix based systems you can also do this:



system("lp $filename") 



:)

bertATnerdstockDOTorg
20-Jan-2003 04:22


If you want to address the printer from your PHP-application in a Un*x environment:

This is possible if you use a different method.

In Unix it would not be logical to address your printer directly from php, but you could for instance generate a PDF-file with PDFlib (or a textfile, or a PNG/JPEG image with GD or what have you) and write it from your php-script to a directory that you use as a "printer-outbox."



Next, you write a shellscript that calls some unix tool to print all pdf or other documents in your "outbox" directory and then deletes all files in that directory.



Then you use crontab to run this script every minute or as often as you think it's neccessary.



You could of course also call the shellscript from your php-application with exec() but you'll probably want to avoid using exec() and the like for security reasons.

add a note

printer_abort

PDO_PGSQL DSN

Last updated: Wed, 26 Oct 2005