In this short tutorial guide, my goal is to share what i know about php.
i wrote this post to show whoever is visiting this forum and whats to know about php.

I had a situation where i had a web form, and my visitors where entering bad words as their names. for example, one field of the form as called, user_name, and some people were puting a bad word as their name, so to prevent people from using these words, PHP offered a neat and cool and useful function called: str_replace()

How does the str_replace() function work?

official this is the description:
str_replace = Replace all occurrences of the search string with the replacement string

Description
mixed str_replace ( mixed search, mixed replace, mixed subject [, int &count] )

basically what this functions does, it looks for a particular character, letter or number (strings) and replaces it to whatever i want to.

Real Life Example:

Suppose i have a form, and the form ask's the user's name, this is how the form would look like:

     Code:

In the form above, the value of user_name is "bad_word", in this case i want to change "bad_word" to "not_allowed", so when i submit the form, my php code would look like this


     Code:

Remeber, i basically changed "bad_word" to "not_allowed", but you can change any string to whatever you what.