Makes case insensitive replacements using regular expressions.
eregi_replace() works just like ereg_replace, but is case insensitive.
<?php
$s = "Coding PHP is fun.";
print "ereg_replace(): " .
ereg_replace("CODING", "Learning", $s) . "<br>";
print "eregi_replace(): " .
eregi_replace("CODING", "Learning", $s);
?> ereg_replace(): Coding PHP is fun.
eregi_replace(): Learning PHP is fun. eregi_replace() is case insensitive, while ereg_replace() is not.