curl turns on the CURL extension to allow the server to support remote collection of the PHP curl function

Curl(), file_get_contents(), and snoopy.class.php are three tools used in remote page crawling or collection. Snoopy.class.php is still used because it is more efficient and does not require a server. Specific configuration support can be used in ordinary virtual hosts. File_get_contents() is slightly less efficient. In common failure situations, curl() is very efficient. It supports multi-threading, but the curl extension needs to be enabled. The following are the steps to enable the curl extension:
　1. Copy the three files php_curl.dll, libeay32.dll, ssleay32.dll in the PHP folder to system32;
　2. Copy php.ini (under the c:WINDOWS directory) Remove the semicolon in ;extension=php_curl.dll;
　3. Restart apache or IIS.

The above introduces curl to enable CURL extension, so that the server supports remote collection of PHP curl functions, including curl content. I hope it will be helpful to friends who are interested in PHP tutorials.