Delete particular word from string

Php str_replace.

str_replace('_normal', '', $var)

What this does is to replace '_normal' with '' (nothing) in the variable $var. Or take a look at preg_replace if you need the power of regular expressions.

The str_ireplace() function does the same job but ignoring the case

like the following

<?php
echo str_ireplace("World","Peter","Hello world!");
?>

output : Hello Peter!

for more example you can see