Problems related to the inability to dynamically load php_curl.dll in PHP5.2.17

How can I dynamically load php_curl.dll in PHP5.2.17? Error. log error message :? PHPWarning: PHPStartup: Unabletoloaddynamiclibrary 'php _ curl. dl: php_curl.dll cannot be dynamically loaded in PHP5.2.17

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Error. log:

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PHP Warning: PHP Startup: Unable to load dynamic library 'php_curl.dll'

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(Tested)Php_curl.dll has been built in. in the ext Directory, this DLL is used to support SSL and zlib.
In php. ini, find extension = php_curl.dll and remove the preceding comment.
Set extension_dir = c: \ php \ ext. when the PHP page is refreshed, an error is reported, indicating that the module php_curl.dll cannot be found.
Copy php_curl.dll to windows \ system32. is the same error .?
After searching for it online, you need:

Libeay32.dll, ssleay32.dll, php5ts. dll, php_curl.dll, and php. ini

Copy them to the system32 directory and restart apache.