Why not to use Magic Quotes

• Portability

  Assuming it to be on, or off, affects portability. Use get_magic_quotes_gpc() to check for this, and code accordingly.

• Performance

  Because not every piece of escaped data is inserted into a database, there is a performance loss for escaping all this data. Simply calling on the escaping functions (like addslashes()) at runtime is more efficient.

  Although php.ini-dist enables these directives by default, php.ini-recommended disables it. This recommendation is mainly due to performance reasons.

• Inconvenience

  Because not all data needs escaping, it's often annoying to see escaped data where it shouldn't be. For example, emailing from a form, and seeing a bunch of \' within the email. To fix, this may require excessive use of stripslashes().