问题
When I run PHP in the CLI mode (PHP 5.6.6 under CentOS 6.5 running as VM using VirtualBox) it has a few seconds of delay even if I only check version and there is php.ini file disabled:
time php -n -v
PHP 5.6.6 (cli) (built: Apr 2 2015 14:18:24)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
real 0m5.066s
user 0m0.012s
sys 0m0.006s
回答1:
The problem is related to DNS call PHP is doing. See here and here.
The solution is to add hostname
[root@dev-machine ~]# hostname
dev-machine.com
to /etc/hosts:
127.0.0.1 dev-machine.com
Result:
time php -n -v
PHP 5.6.6 (cli) (built: Apr 2 2015 14:18:24)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
real 0m0.018s
user 0m0.012s
sys 0m0.004s
来源：https://stackoverflow.com/questions/29510665/php-cli-has-a-few-seconds-delay