How do you ignore case sensitive in regex?

preg_match() returns 1 if the pattern matches given subject , 0 if it does not, or false on failure . This function may return Boolean false , but may also return a non-Boolean value which evaluates to false .

If you want only part of the regex to be case insensitive (as my original answer presumed), then you have two options:

preg_match is case sensitive .

The preg_match() function returns whether a match was found in a string .