UBB.Developers Forums Community Development Programming PHP and Server-side Scripting Strings

I would like to find part a string and then be able to delete it.
For example if i had the string
"This is a string"
I would like to delete the word "is"
HOw would i do this, and retani the rest of the string, so that i end up with "This a string"
This will need to be done for many different strings, so i cannot simply use strlen() functions to return a specific lenght of the string.

$s1 = 'This is a string';

For that particular example, a couple of methods could be used:

$s2 = str_replace(' is ', ' ', $s1);

$s2 = preg_replace('/ is /', ' ', $s1);

Thank you very much....just neede that to give the fnishing touches to the control panel of my website.