Build an apache+php development environment, and apache was installed normally. However, after the downloaded php was built, and after configuring apache and php, the error "The requested operation has failed!" was always reported. After changing several versions of php, it still remained the same. no. Replaced php-5.3.28-Win32-VC9-x86, php-5.4.5-nts-Win32-VC9-x86, php-5.4.28-Win32-VC9-x86, php-5.5.12-Win32-VC11- x86 still has this error.
Occasionally I found an article
http://blog.csdn.net/vancekq/article/details/7716555