Why didn't I know this before?! MySQL & PHP

Hm, I just realized that MySQL’s REPLACE() is PHP’s STR_REPLACE(). It is more quicker than doing same job in php. Why didn't I know this before?!

The PHP function that I used was str_replace(). If you aren't familiar with the function, here's what it does:

$string = '28/10/2013';

$result = str_replace('_', '-', $string);  //becomes 28-10-2013

In MySQL, this is:

UPDATE `table_name` SET `data` = REPLACE( data, '/', '-' )

Using MySQL's function allows me to fix the problem once and it is faster for a big database.

Again, Why didn't I know this before?!