PHP development environments often encounter errors

: This article describes common errors in the PHP development environment. For more information about PHP tutorials, see. Fatal error: Call to undefined function mcrypt_get_block_size ()

This error indicates that the mcrypt extension is not installed or enabled.

Sudo apt-get install php5-mcrypt libmcrypt4 libmcrypt-dev // install expansion package

Cd/etc/php5/apache2/conf. d // enter the apache configuration folder

Sudo ln-s.../mod-available/mcrypt. ini./20-mcrypt.ini // create a shortcut to the extended configuration file

The above describes common errors in the PHP development environment, including some content. I hope my friends who are interested in the PHP Tutorial can help me.