In response to this previous post from Felix Geisendorfer, Sara Golemon shares a few thoughts on why she thinks it's just the other way around - create_function is not your friend.

In the short post she lists just a few of the issues surrounding the use of the function including that it:

• is prone to critical abuse by user-supplied code
• skips opcode cache optimizations
• encourages not using comments (evil)
• 100% blind to reflection or PHPDoc style documentation generation