PHP运行环境XAMPP 启动apache时出现错误，apache无法启动，XAMPP 控制面板底部的活动日志中找到错误信息，如下，即Apache意外关闭错：
22:29:10 [Apache] Error: Apache shutdown unexpectedly. 22:29:10 [Apache] This may be due to a blocked port, missing dependencies, 22:29:10 [Apache] improper privileges, a crash, or a shutdown by another method. 22:29:10 [Apache] Press the Logs button to view error logs and check 22:29:10 [Apache] the Windows Event Viewer for more clues 22:29:10 [Apache] If you need more help, copy and post this 22:29:10 [Apache] entire log window on the forums 22:29:12 [Apache] Problem detected! 22:29:12 [Apache] Port 443 in use by ""D:\Program Files (x86)\VMware\VMware Workstation\vmware-hostd.exe" -u "C:\ProgramData\VMware\hostd\config.xml"" with PID 3872! 22:29:12 [Apache] Apache WILL NOT start without the configured ports free! 22:29:12 [Apache] You need to uninstall/disable/reconfigure the blocking application 22:29:12 [Apache] or reconfigure Apache and the Control Panel to listen on a different port
从错误信息可以看出443端口被VMware占用，导致apache无法监听443端口。打开XAMPP控制面板的Netstat，发现443端口果然被占用，打开任务管理器将vmware-hostd.exe进程关闭，再次启动apache时启动正常。
若出现类似情况，首先打开Netstat查看端口情况，在做决定