How to use php curl_setopt function? Detailed explanation of curl_setopt usage

This article mainly introduces the usage of curl_setopt function in PHP, and analyzes the function, definition, purpose and related usage skills of curl_setopt function in the form of examples. I hope to be helpful.

curl_setopt function is an important function in PHP. It can imitate some user behaviors, such as imitating user login, registration and other user-operable behaviors.

bool curl_setopt (int ch, string option, mixed value)

The curl_setopt() function will set options for a CURL session. The option parameter is the setting you want, and the value is the value given by this option
Fake login

Main station wap login and discuz forum wap login, the user data on both sides are called in the same table

//论坛api登录接口地址：
$uri = "http//yoursiteweb.com/"
//参数数组

$data = array(
'username' => 'username',
'password' => 'password',
);
//操作执行

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $uri);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HEADER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_exec($ch);

Unify the two-day sessionid generation mechanism and transform the forum wap user verification method

Imitate user login instance

function vcurl($url,$post='',$cookie='',$cookiejar='',$referer=''){
$tmpInfo = '';
$cookiepath = getcwd().'./'.$cookiejar;
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
if($referer) {
curl_setopt($curl, CURLOPT_REFERER, $referer);
} else {
curl_setopt($curl, CURLOPT_AUTOREFERER, 1);
}
if($post) {
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $post);
}
if($cookie) {
curl_setopt($curl, CURLOPT_COOKIE, $cookie);
}
if($cookiejar) {
curl_setopt($curl, CURLOPT_COOKIEJAR, $cookiepath);
curl_setopt($curl, CURLOPT_COOKIEFILE, $cookiepath);
}
//curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 100);
curl_setopt($curl, CURLOPT_HEADER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$tmpInfo = curl_exec($curl);
if (curl_errno($curl)) {
echo ' 错误:'.curl_error($curl); 
} 
curl_close($curl); 
return $tmpInfo; 
} 
?>

The parameter reference is as follows:

The values ​​of the following options will be used as long integers (specified in the option parameter):

CURLOPT_INFILESIZE: When you upload a file to the remote site, this option tells PHP that you are uploading the file size.

CURLOPT_VERBOSE: If you want CURL to report every unexpected event, set this option to a non-zero value.

CURLOPT_HEADER: If you want to include a header in the output, set this option to a non-zero value.

CURLOPT_NOPROGRESS: If you do not want PHP to display a progress bar for CURL transfers, set this option to a non-zero value.

Note: PHP automatically sets this option to a non-zero value, you should only change this option for debugging purposes.

CURLOPT_NOBODY: If you do not want to include the body part in the output, set this option to a non-zero value.

CURLOPT_FAILONERROR: If you want PHP not to display when an error occurs (HTTP code return greater than or equal to 300), set this option to a non-zero value. The default behavior is to return a normal page and ignore the code.

CURLOPT_UPLOAD: If you want PHP to prepare for uploading, set this option to a non-zero value.

CURLOPT_POST: If you want PHP to do a regular HTTP POST, set this option to a non-zero value. This POST is of the ordinary application/x-www-from-urlencoded type, mostly used by HTML forms.

CURLOPT_FTPLISTONLY: Set this option to a non-zero value and PHP will list the directory names for FTP.

CURLOPT_FTPAPPEND: Set this option to a non-zero value and PHP will apply the remote file instead of overwriting it.

CURLOPT_NETRC: Set this option to a non-zero value and PHP will look in your ~./netrc file for the username and password of the remote site you want to connect to

CURLOPT_FOLLOWLOCATION: Setting This option is a non-zero header (like 'Location: ') that the server will send as part of the HTTP header (note that this is recursive, PHP will send a header like 'Location: ').

CURLOPT_PUT: Set this option to a non-zero value to upload a file using HTTP. To upload this file you must set the CURLOPT_INFILE

CURLOPT_INFILESIZE option.

CURLOPT_MUTE: Set this option to a non-zero value and PHP will be completely silent for the CURL function.

CURLOPT_TIMEOUT: Set a long integer as the maximum number of seconds.

CURLOPT_LOW_SPEED_LIMIT: Set a long integer to control how many bytes are transmitted.

CURLOPT_LOW_SPEED_TIME: Set a long integer to control how many seconds to transmit the number of bytes specified by CURLOPT_LOW_SPEED_LIMIT

CURLOPT_RESUME_FROM: Pass a long integer parameter containing the byte offset address, (you want to transfer to start form).

CURLOPT_SSLVERSION: Pass a long parameter containing the SSL version. By default PHP will do its own hard work, in more security you have to set it manually.

CURLOPT_TIMECONDITION: Pass a long parameter to specify how to handle the CURLOPT_TIMEVALUE parameter. You can set this parameter to

TIMECOND_IFMODSINCE or TIMECOND_ISUNMODSINCE. This is only for HTTP.

CURLOPT_TIMEVALUE: Pass a number of seconds from 1970-1-1 to now. This time will be used as the specified value by the CURLOPT_TIMEVALUE option, or by the default TIMECOND_IFMODSINCE.

The values ​​of the following options will be treated as strings:

CURLOPT_URL: This is the URL address you want to retrieve using PHP. You can also set this option during initialization with the curl_init() function.

CURLOPT_USERPWD: Pass a string in the form of [username]:[password] and use PHP to connect.

CURLOPT_PROXYUSERPWD: Pass a string in the format [username]:[password] to connect to the HTTP proxy.

CURLOPT_RANGE: Pass a range you want to specify. It should be in 'X-Y' format, with X or Y being excluded. HTTP transfers also support several intervals, separated by commas (X-Y,N-M).

CURLOPT_POSTFIELDS: Pass a string containing all data as an HTTP "POST" operation.

CURLOPT_REFERER: A string containing a 'referer' header in the HTTP request.

CURLOPT_USERAGENT: A string containing a 'user-agent' header in the HTTP request.

CURLOPT_FTPPORT: Pass an IP address containing the IP address used by the ftp 'POST' command. This POST command tells the remote server to connect to the IP address we specified. This string can be an IP address, a host name, a network interface name (under UNIX), or '-' (use the system default IP address).

CURLOPT_COOKIE: Pass a header connection containing an HTTP cookie.

CURLOPT_SSLCERT: Pass a string containing the certificate in PEM format.

CURLOPT_SSLCERTPASSWD: Pass a password containing the necessary password to use the CURLOPT_SSLCERT certificate.

CURLOPT_COOKIEFILE: Pass a string containing the name of the file containing cookie data. This cookie file can be in Netscape format, or it can be a stack of HTTP-style headers stored in the file.

CURLOPT_CUSTOMREQUEST: When making an HTTP request, pass a character to be used by GET or HEAD. This is useful for doing or another, more obscure, HTTP request.

Note: Do not do this before confirming that your server supports the command.

The following options require a file description (obtained by using the fopen() function):

CURLOPT_FILE: This file will be the output file you place the transfer. The default is STDOUT.

CURLOPT_INFILE: This file is the input file you sent.

CURLOPT_WRITEHEADER: This file contains the header part of your output.

CURLOPT_STDERR: This file has errors written to it instead of stderr.

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