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<?php /** * This file is part of escpos-php: PHP receipt printer library for use with * ESC/POS-compatible thermal and impact printers. * * Copyright (c) 2014-16 Michael Billington < michael.billington@gmail.com >, * incorporating modifications by others. See CONTRIBUTORS.md for a full list. * * This software is distributed under the terms of the MIT license. See LICENSE.md * for details. */ namespace Mike42\Escpos\PrintConnectors; use Exception; /** * PrintConnector for passing print data to a file. */ class FilePrintConnector implements PrintConnector { /** * @var resource $fp * The file pointer to send data to. */ protected $fp; /** * Construct new connector, given a filename * * @param string $filename */ public function __construct($filename) { $this -> fp = fopen($filename, "wb+"); if ($this -> fp === false) { throw new Exception("Cannot initialise FilePrintConnector."); } } public function __destruct() { if ($this -> fp !== false) { trigger_error("Print connector was not finalized. Did you forget to close the printer?", E_USER_NOTICE); } } /** * Close file pointer */ public function finalize() { fclose($this -> fp); $this -> fp = false; } /* (non-PHPdoc) * @see PrintConnector::read() */ public function read($len) { return fread($this -> fp, $len); } /** * Write data to the file * * @param string $data */ public function write($data) { fwrite($this -> fp, $data); } }
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