In-depth understanding of the curl class, which can be used to simulate get, post, and curl download _ PHP Tutorial-php Tutorial

A deep understanding of the curl class can be used to simulate get, post, and curl downloads. The copy code is as follows :? PhpclassCurl {** get method to obtain the access address * @ paramstringurl the address to be accessed * @ paramstringcookiecookie storage address As follows:

The code is as follows:

Class Curl {
/*
* Get access to the specified address
* @ Param string url the address to be accessed
* @ Param string cookie: The storage address of the cookie. If no cookie exists, no cookie is sent.
* @ Return string curl_exec () information obtained
* @ Author andy
**/
Public function get ($ url, $ cookie = '')
{
// Initialize a cURL session
$ Curl = curl_init ($ url );
// No header information is displayed.
Curl_setopt ($ curl, CURLOPT_HEADER, 0 );
// Return the information obtained by curl_exec () in the form of a file stream instead of directly outputting it.
Curl_setopt ($ curl, CURLOPT_RETURNTRANSFER, 1 );
// Use automatic redirect
Curl_setopt ($ curl, CURLOPT_FOLLOWLOCATION, 1 );
If (! Empty ($ cookie )){
// The name of the file containing the cookie data. the format of the cookie file can be Netscape, or the file is saved only with HTTP header information.
Curl_setopt ($ curl, CURLOPT_COOKIEFILE, $ cookie );
}
// Automatically set Referer
Curl_setopt ($ curl, CURLOPT_AUTOREFERER, 1 );
// Execute a curl session
$ Tmp = curl_exec ($ curl );
// Close the curl session
Curl_close ($ curl );
Return $ tmp;
}
/*
* Simulate the specified address of a request in post mode
* @ Param string the specified address of the url request
* @ Param array
* # Patam string cookie storage address
* @ Return string curl_exec () information obtained
* @ Author andy
**/
Public function post ($ url, $ params, $ cookie)
{
$ Curl = curl_init ($ url );
Curl_setopt ($ curl, CURLOPT_HEADER, 0 );
// Check the certificate Source. 0 indicates that the certificate validity check is blocked.
Curl_setopt ($ curl, CURLOPT_SSL_VERIFYPEER, false );
// Check whether the SSL encryption algorithm exists from the certificate
Curl_setopt ($ curl, CURLOPT_SSL_VERIFYHOST, 1 );
// Simulate the browser used by the user. the HTTP request contains a string containing the "user-agent" header.
Curl_setopt ($ curl, CURLOPT_USERAGENT, $ _ SERVER ['http _ USER_AGENT ']);
// Send a regular POST request in the type of application/x-www-form-urlencoded, just like submitting a form.
Curl_setopt ($ curl, CURLOPT_POST, 1 );
// Return the information obtained by curl_exec () in the form of a file stream instead of directly outputting it.
Curl_setopt ($ curl, CURLOPT_RETURNTRANSFER, 1 );
// Use automatic redirect
Curl_setopt ($ curl, CURLOPT_FOLLOWLOCATION, 1 );
// Automatically set Referer
Curl_setopt ($ curl, CURLOPT_AUTOREFERER, 1 );
// Cookie address
Curl_setopt ($ curl, CURLOPT_COOKIEJAR, $ cookie );
// All data is sent using the "POST" operation in the HTTP protocol. To send a file,
// Add the @ prefix to the file name and use the full path. This parameter can be passed through the urlencoded string
// Similar to 'para1 = val1 limit 2 = val2 &... 'or use an array with the field name as the key value and field data as the value
// If the value is an array, the Content-Type header is set to multipart/form-data.
Curl_setopt ($ curl, CURLOPT_POSTFIELDS, http_build_query ($ params ));
$ Result = curl_exec ($ curl );
Curl_close ($ curl );
Return $ result;
}
/**
* Remote download
* @ Param string $ remote Image address
* @ Param string $ address saved locally
* @ Param string $ optional cookie address parameter
* In some websites, cookies are required to download images on the website.
* Therefore, you need to add cookies.
* @ Return void
* @ Author andy
*/
Public function reutersload ($ remote, $ local, $ cookie = ''){
$ Cp = curl_init ($ remote );
$ Fp = fopen ($ local, "w ");
Curl_setopt ($ cp, CURLOPT_FILE, $ fp );
Curl_setopt ($ cp, CURLOPT_HEADER, 0 );
If ($ cookie! = ''){
Curl_setopt ($ cp, CURLOPT_COOKIEFILE, $ cookie );
}
Curl_exec ($ cp );
Curl_close ($ cp );
Fclose ($ fp );
}
}

The pipeline code is as follows :? Php class Curl {/** get method to obtain the address specified for access * @ param string url the address to be accessed * @ param string cookie storage address...