How to check the first 3 characters in a string for a match?

Question

PHP

How to check the first 3 characters in a string for a match and if they match the given value - remove them from the string?
Thank you.

Answer 1

preg_replace('/^'.$var1.'/siu', '', $var2);

Answer 2

preg_replace("/^abc(.*)/uim", "$1", $text);

Answer 3

if the characters are known, then just do a str replace.
If they are, then they will be deleted, if not, then nothing will happen.
You don't really need to cut the regulator.