How to check, if a php string contains only english letters and digits?

Question

In JS I used this code:

if(string.match(/[^A-Za-z0-9]+/))

but I don\'t know, how to do it in PHP.

Answer 1

if you need to check if it is English or not. you could use below function. might help someone..

function is_english($str)
{
    if (strlen($str) != strlen(utf8_decode($str))) {
        return false;
    } else {
        return true;
    }
}