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    User Contributed Notes 10 notes

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    24
    frank at interactinet dot com
    13 years ago
    I wrote the following to see if a submitted URL has a valid http response code and also if it responds quickly.

    Use the code like this:

    <?php
    $is_ok     = http_response($url); // returns true only if http response code < 400
    ?>

    The second argument is optional, and it allows you to check for a specific response code

    <?php
    http_response    ($url,'400'); // returns true if http status is 400
    ?>

    The third allows you to specify how long you are willing to wait for a response.

    <?php
    http_response    ($url,'200',3); // returns true if the response takes less than 3 seconds and the response code is 200
    ?>

    <?php
    function http_response($url, $status = null, $wait = 3)
    {
    $time = microtime(true);
    $expire = $time + $wait;

    // we fork the process so we don't have to wait for a timeout
    $pid = pcntl_fork();
    if (    $pid == -1) {
    die(    'could not fork');
    } else if (    $pid) {
    // we are the parent
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, TRUE);
    curl_setopt($ch, CURLOPT_NOBODY, TRUE); // remove body
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    $head = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if(!    $head)
    {
    return     FALSE;
    }

    if(    $status === null)
    {
    if(    $httpCode < 400)
    {
    return     TRUE;
    }
    else
    {
    return     FALSE;
    }
    }
    elseif(    $status == $httpCode)
    {
    return     TRUE;
    }

    return     FALSE;
    pcntl_wait($status); //Protect against Zombie children
    } else {
    // we are the child
    while(microtime(true) < $expire)
    {
    sleep(0.5);
    }
    return     FALSE;
    }
    }
    ?>

    Hope this example helps. It is not 100% tested, so any feedback [sent directly to me by email] is appreciated.
    up
    11
    artem at zabsoft dot co dot in
    15 years ago
    Hey I modified script for php 5. Also I add support server auth. and fixed some little bugs on the script.

    [EDIT BY danbrown AT php DOT net: Original was written by (unlcuky13 AT gmail DOT com) on 19-APR-09. The following note was included:
    Below is the my way of using through PHP 5 objecte oriented encapsulation to make thing easier.]

    <?php
    class mycurl {
    protected     $_useragent = 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1';
    protected     $_url;
    protected     $_followlocation;
    protected     $_timeout;
    protected     $_maxRedirects;
    protected     $_cookieFileLocation = './cookie.txt';
    protected     $_post;
    protected     $_postFields;
    protected     $_referer ="http://www.google.com";

    protected     $_session;
    protected     $_webpage;
    protected     $_includeHeader;
    protected     $_noBody;
    protected     $_status;
    protected     $_binaryTransfer;
    public     $authentication = 0;
    public     $auth_name = '';
    public     $auth_pass = '';

    public function     useAuth($use){
    $this->authentication = 0;
    if(    $use == true) $this->authentication = 1;
    }

    public function     setName($name){
    $this->auth_name = $name;
    }
    public function     setPass($pass){
    $this->auth_pass = $pass;
    }

    public function     __construct($url,$followlocation = true,$timeOut = 30,$maxRedirecs = 4,$binaryTransfer = false,$includeHeader = false,$noBody = false)
    {
    $this->_url = $url;
    $this->_followlocation = $followlocation;
    $this->_timeout = $timeOut;
    $this->_maxRedirects = $maxRedirecs;
    $this->_noBody = $noBody;
    $this->_includeHeader = $includeHeader;
    $this->_binaryTransfer = $binaryTransfer;

    $this->_cookieFileLocation = dirname(__FILE__).'/cookie.txt';

    }

    public function     setReferer($referer){
    $this->_referer = $referer;
    }

    public function     setCookiFileLocation($path)
    {
    $this->_cookieFileLocation = $path;
    }

    public function     setPost ($postFields)
    {
    $this->_post = true;
    $this->_postFields = $postFields;
    }

    public function     setUserAgent($userAgent)
    {
    $this->_useragent = $userAgent;
    }

    public function     createCurl($url = 'nul')
    {
    if(    $url != 'nul'){
    $this->_url = $url;
    }

    $s = curl_init();

    curl_setopt($s,CURLOPT_URL,$this->_url);
    curl_setopt($s,CURLOPT_HTTPHEADER,array('Expect:'));
    curl_setopt($s,CURLOPT_TIMEOUT,$this->_timeout);
    curl_setopt($s,CURLOPT_MAXREDIRS,$this->_maxRedirects);
    curl_setopt($s,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($s,CURLOPT_FOLLOWLOCATION,$this->_followlocation);
    curl_setopt($s,CURLOPT_COOKIEJAR,$this->_cookieFileLocation);
    curl_setopt($s,CURLOPT_COOKIEFILE,$this->_cookieFileLocation);

    if(    $this->authentication == 1){
    curl_setopt($s, CURLOPT_USERPWD, $this->auth_name.':'.$this->auth_pass);
    }
    if(    $this->_post)
    {
    curl_setopt($s,CURLOPT_POST,true);
    curl_setopt($s,CURLOPT_POSTFIELDS,$this->_postFields);

    }

    if(    $this->_includeHeader)
    {
    curl_setopt($s,CURLOPT_HEADER,true);
    }

    if(    $this->_noBody)
    {
    curl_setopt($s,CURLOPT_NOBODY,true);
    }
    /*
    if($this->_binary)
    {
    curl_setopt($s,CURLOPT_BINARYTRANSFER,true);
    }
    */
    curl_setopt($s,CURLOPT_USERAGENT,$this->_useragent);
    curl_setopt($s,CURLOPT_REFERER,$this->_referer);

    $this->_webpage = curl_exec($s);
    $this->_status = curl_getinfo($s,CURLINFO_HTTP_CODE);
    curl_close($s);

    }

    public function     getHttpStatus()
    {
    return     $this->_status;
    }

    public function     __tostring(){
    return     $this->_webpage;
    }
    }
    ?>

    [EDIT BY danbrown AT php DOT net: Contains a bugfix supplied by "roetsch.beni at googlemail (dot) com" on 02-AUG-09, with the following note: "Fixes the bugfix: 417 bug at lighthttp server."]
    up
    8
    gmail@asmqb7
    8 years ago
    WARNING WARNING

    In this example: http://php.net/manual/en/book.curl.php#102885 by "frank at interactinet dot com"

    There's a small bug in

    <?php

    ...

    elseif(    $status == $httpCode)
    {
    return     TRUE;
    }

    return     FALSE;
    pcntl_wait($status); //Protect against Zombie children
    } else {
    // we are the child
    while(microtime(true) < $expire)

    ...

    ?>

    The code will immediately leave the function at the `return`, and pcntl_wait() will NEVER be executed, under any circumstances.

    I can't see any other issues with this function however.
    up
    9
    artax_N_O_S_P_A_M_erxes2 at iname dot com
    14 years ago
    I needed to use cURL in a php script to download data using not only SSL for the server authentication but also for client authentication.
    On a default install of Fedora, setting up the proper cURL parameters, I would get an error:

    $ php curl.php
    Peer certificate cannot be authenticated with known CA certificates

    The data on http://curl.haxx.se/docs/sslcerts.html was most useful. Indeed, toward to bottom it tells you to add a missing link inside /etc/pki/nssdb to use the ca-bundle.crt file. You do it so:

    # cd /etc/pki/nssdb
    # ln -s /usr/lib64/libnssckbi.so libnssckbi.so

    Now you can do client authentication, provided you have your certificate handy with:

    <?php
    $data     = "<soap:Envelope>[...]</soap:Envelope>";
    $tuCurl = curl_init();
    curl_setopt($tuCurl, CURLOPT_URL, "https://example.com/path/for/soap/url/");
    curl_setopt($tuCurl, CURLOPT_PORT , 443);
    curl_setopt($tuCurl, CURLOPT_VERBOSE, 0);
    curl_setopt($tuCurl, CURLOPT_HEADER, 0);
    curl_setopt($tuCurl, CURLOPT_SSLVERSION, 3);
    curl_setopt($tuCurl, CURLOPT_SSLCERT, getcwd() . "/client.pem");
    curl_setopt($tuCurl, CURLOPT_SSLKEY, getcwd() . "/keyout.pem");
    curl_setopt($tuCurl, CURLOPT_CAINFO, getcwd() . "/ca.pem");
    curl_setopt($tuCurl, CURLOPT_POST, 1);
    curl_setopt($tuCurl, CURLOPT_SSL_VERIFYPEER, 1);
    curl_setopt($tuCurl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($tuCurl, CURLOPT_POSTFIELDS, $data);
    curl_setopt($tuCurl, CURLOPT_HTTPHEADER, array("Content-Type: text/xml","SOAPAction: \"/soap/action/query\"", "Content-length: ".strlen($data)));

    $tuData = curl_exec($tuCurl);
    if(!    curl_errno($tuCurl)){
    $info = curl_getinfo($tuCurl);
    echo     'Took ' . $info['total_time'] . ' seconds to send a request to ' . $info['url'];
    } else {
    echo     'Curl error: ' . curl_error($tuCurl);
    }

    curl_close($tuCurl);
    echo     $tuData;
    ?>
    up
    1
    zle.lc
    3 years ago
    Sharing is caring, handles included.

    <?php

    $url_one     = "php.net";
    $url_two = "";

    $user_agent = 'Mozilla HotFox 1.0';

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url_one.$url_two);
    curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_NOBODY, 0);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    $res = curl_exec($ch);
    curl_close($ch);

    $url_two = "lazyphp.net";
    $url_one = "";
    $res_two = curl_exec($ch);
    curl_close($ch);

    ?>
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    2
    ramez at dot dontspan dot zegenie dot com
    14 years ago
    CURL failed with PHP5.3 and Apache2.2.X on my Windows 7 machine.

    It turns out that it's not enough to copy the two dll's mentioned (libeay32 and sslea32) from the php folder into your system32 folder. You HAVE TO UNBLOCK THESE TWO FILES.

    Right click the file, select unblock, for each one. Then restart Apache.

    Another very handy security feature added into Windows.
    up
    0
    qrworld.net
    10 years ago
    Here you have a function that I use to get the content of a URL using cURL:

    function getUrlContent($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
    curl_setopt($ch, CURLOPT_TIMEOUT, 5);
    $data = curl_exec($ch);
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    return ($httpcode>=200 && $httpcode<300) ? $data : false;
    }

    The source comes from this website:

    http://softontherocks.blogspot.com/2014/11/descargar-el-contenido-de-una-url.html
    up
    -1
    jcmargentina at gmail dot com
    5 years ago
    Please note that new versions of curl is using http2 as default, so if you are having some strange errors, 0 http status codes, etc, please explicitly specify the http version in your code.
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    -2
    fred dot knieper at gmail dot com
    10 years ago
    After a lot of frustration with the fact that nobody has documented which curl commandline options go with which library functions, I discovered that the curl commandline will tell you (in the form of a C program) if you add `--libcurl foo.c`

    If you've been struggling with trying to figure out how to get your fancy curl commandline to work in PHP, this makes it a breeze!
    up
    -2
    eflash at gmx dot net
    16 years ago
    In order to use curl with secure sites you will need a ca-bundle.crt file; here's a PHP script I've written which creates a fresh ca-bundle:
    http://www.gknw.net/php/phpscripts/mk-ca-bundle.php
    I've also written scripts in other languages, f.e. the Perl one which ships now with curl distributions:
    http://curl.haxx.se/lxr/source/lib/mk-ca-bundle.pl
    and also a Win32 WSH script if you prefer that:
    http://www.gknw.net/vb/scripts/mk-ca-bundle.vbs

    HTH, Guenter.
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