PHP strpos check against many

Question

I am looking to use strpos to check for many chars in a string, for example:

I would like to separately check for the chars :,!, a

Answer 1

Use preg_match

preg_match("/[:!&]/", $string) !== 1;

Example:

var_dump(preg_match("/[:!&]/", "this is !a test string"));
> int(1)
var_dump(preg_match("/[:!&]/", "this is a test string"));
> int(0)

preg_match() returns 1 if the pattern matches given subject, 0 if it does not, or FALSE if an error occurred.