Regular expression* problem

Question

<?php

$zz = '/Audi*/';

##$string = "Audi 2500 is my favorite Love";

if(preg_match($zz, $string, $matches)){

echo 'Matched, the result is: ';

var_dump($matches);

}else{

echo 'No match';

}

? >

Why is the output result 'Audi' instead of 'Audi Audi' or 'Audi Di'? Isn't * at least 0 times? How come not all of them were extracted in two cases?

Answer 1

Using preg_match should match "Audi", using preg_match_all should match "Audi Audi",

This is a theoretical result, but in fact I have not seen any examples of regular matching in Chinese. Regular It can only check whether it is Chinese and has a limited length, and it uses Chinese bytecode, similar to this: u4e00-u9fa5

Answer 2

preg_match only matches one

preg_match_all is the entire matching result

It is recommended to check the manual