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This article introduces the relevant knowledge of "how to understand the curl opening problem of PHP". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Today, I am doing a login function of Sina. The PHP SDK provided by Sina needs to use the curl_init () function. When debugging, I can't find the method of curl_init ().

After searching, we know that we need to open the php extension of curl, so what is curl? What can I do?

In short, when we need to capture the data information of a website, we can use file (), file_get_contents () and other web page reading functions, because too many thieves are rampant, causing some sites to make domain name restrictions, so these file () functions are inefficient or even invalid.

If you use curl to optimize it, you can have some powerful and flexible functions such as forms, cookie, validation and so on.

To turn on curl

1. Output phpinfo under the localhost site to detect the location of the php.ini

(because when I opened CURL, I configured php.ini in the installation directory of php, but it did not take effect. Later, I checked phpinfo to know that php.ini is in apache.

Has been redirected by me in the configuration file)

two。 Open the php.ini file, search for PHP _ curl.dll, find it, delete the previous ";", and restart apache

3. If the test still cannot find curl_init (), change the php_curl.dll in the ext directory in the php directory and the libeay32.dll,php5ts.dll,ssleay32.dll in the php directory

Copy to c:\ windows\ system32 and restart apache

Verify whether the curl extension is enabled, which can be found in phpinfo ()

You can also use program verification

The copy code is as follows:

/ / 1. Initialization

$ch = curl_init ()

/ / 2. Set options, including URL

Curl_setopt ($ch, CURLOPT_URL, "http://www.tupc1028.com");"

Curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1)

Curl_setopt ($ch, CURLOPT_HEADER, 0)

/ / 3. Execute and get the HTML document content

$output = curl_exec ($ch)

/ / 4. Release the curl handle

Curl_close ($ch)

$output = curl_exec ($ch)

If ($output = FALSE) {

Echo "cURL Error:". Curl_error ($ch)

}

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