How does the stripos() function work?

[eldan88]

Hey,

 

I am trying to understand how the stripos() function works, and having a hard time trying to understand it. Can someone please explain me how it works. Thanks!

[MySQL_Narb]

Not too sure if this helps, but there's an entire page on it.

 

http://php.net/manual/en/function.stripos.php

[P5system]

stripos — Find the position of the first occurrence of a case-insensitive substring in a string.

For example:

stripos(string,find,start);

<?php

echo stripos("Hello world!","WO");

?>

The output of the code above will be:

6

[Strider64]

I created a simple bad word function using stripos

 

function bad_word_filter($text, $bypass_write=false)

{

 

 

$patterns = array();

//bad words list

$patterns[0] = '****'; //Obviously bad words would go here

$patterns[1] = '****';

$patterns[2] = '****';

$patterns[3] = '****t';

 

 

foreach ($patterns as $check_for_word) {

if (stripos($text, $check_for_word) !== false) {

$bypass_write = true; // logica value to bypass write to dateabase check.

break;

}

}

 

return $bypass_write;

}

 

It's a basic function and simplistic bad words function (though I guess a person could make it more complex if he/she chooses), but it serves it's purpuse for me in my small cms webpage. Pretty neat little function this stripos is.

Edited February 21, 2013 by Strider64