It is said on the following link:
Using the strpos() function
The strpos() function is used to search for a string or character within a string.
If a match is found in the string, this function will return the position of the first match. If no match is found, it will return FALSE.
Isn't the following supposed to output to screen "FALSE" ? I do not see this happening.
<?php echo strpos("Hello world!","s"); ?>