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<?php
/* CURL Extension Emulation Library
* Version 1.0.4
* Copyright 2004-2007, Steve Blinch
* http://code.blitzaffe.com
* ============================================================================
*
* DESCRIPTION
*
* Provides a pure-PHP implementation of the PHP CURL extension, for use on
* systems which do not already have the CURL extension installed. It emulates
* all of the curl_* functions normally provided by the CURL extension itself.
*
* This will automatically detect and use the best CURL implementation available
* on your server. It will attempt the following, in order:
*
* 1) Check for the existence of the "real" CURL PHP Extension. If it is
* loaded, the library will do nothing (and it will not interfere with the
* "real" extension).
* 2) Check for the existence of the CURL console binary (usually located in
* /usr/bin/curl). If found, the library will emulate the CURL PHP
* extension (including all curl_* functions) and use the console binary
* to execute all requests.
* 3) If neither the "real" CURL PHP Extension nor the CURL console binary
* are available, the library will emulate the CURL PHP extension (including
* all curl_* functions) using a native, pure-PHP HTTP client implementation.
* This implementation is somewhat limited, but it provides support for most
* of the common CURL options. HTTPS (SSL) support is available in this
* mode under PHP 4.3.0 if the OpenSSL Extension is loaded.
*
* Thus, by including this library in your project, you can rely on having some
* level of CURL support regardless of the configuration of the server on which
* it is being used.
*
*
* HISTORY
*
* 1.0.4 (not released)
* - Fixed HTTPRetriever double-inclusion bug.
*
*
* USAGE
*
* Simply copy all of the libcurlemu files into your project directory, then:
*
* require_once("libcurlemu.inc.php");
*
* After this, you can use all of the curl_* functions documented in the PHP
* Manual.
*
*
* EXAMPLE
*
* // CURL Extension Emulation Library Example
* //
* // Usage should be straightforward; you simply use this script exactly as you
* // would normally use the PHP CURL extension functions.
*
* // first, include libcurlemu.inc.php
* require_once('libcurlemu.inc.php');
*
* // at this point, libcurlemu has detected the best available CURL solution
* // (either the CURL extension, if available, or the CURL commandline binary,
* // if available, or as a last resort, HTTPRetriever, our native-PHP HTTP
* // client implementation) and has implemented the curl_* functions if
* // necessary, so you can use CURL normally and safely assume that all CURL
* // functions are available.
*
* // the rest of this example code is copied straight from the PHP manual's
* // reference for the curl_init() function, and will work fine with libcurlemu
*
* // create a new CURL resource
* $ch = curl_init();
*
* // set URL and other appropriate options
* curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
* curl_setopt($ch, CURLOPT_HEADER, false);
*
* // grab URL and pass it to the browser
* curl_exec($ch);
*
* // close CURL resource, and free up system resources
* curl_close($ch);
*
*
* LICENSE
*
* This script is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This script is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with this script; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
if (!extension_loaded('curl') && !function_exists('curl_init')) {
define('CURLEXT_MISSING_ABORT',true);
require_once(dirname(__FILE__)."/libcurlexternal.inc.php");
if (!function_exists('curl_init')) {
if (!class_exists('HTTPRetriever')) require_once(dirname(__FILE__)."/class_HTTPRetriever.php");
require_once(dirname(__FILE__)."/libcurlnative.inc.php");
}
}
?>
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