Jul
2,
2019

PHP regex: ^ and $ vs \A and \z

When tempted to do this:



$name = "joe";

if (preg_match('/^[a-zA-Z]+$/', $name) {

}


Chances are, you probably want use this instead:



if (preg_match('/\A[a-zA-Z]+\z/', $name) {

}


Why?

Use of ^ is OK, but $ matches line break characters.
So,



$name = "joe¥n";

if (preg_match('/^[a-zA-Z]+$/', $name) {

    echo "match!";

}


Will display "match!" - which is probably something you don't want.
#php
Share

People Who Wowed This Post

×
  • If you are a bloguru member, please login.
    Login
  • If you are not a bloguru member, you may request a free account here:
    Request Account
This user only allows bloguru members to make comments.
If you are a bloguru member, please login.
Login
If you are not a bloguru member, you may request a free account here:
Request Account