如何选择链接中的第一个数字

Question

I have a link, something like this:

$link = 'http://www.example/data/showall.php?quantity=&lang=eng&sura=2&ayat=21';

Now I want the first number of it, In this case I want 2.

Note: All characters are fixed except the numbers.

To simplify my string, I can replace the first of it with empty, something like this:

$link ='2&ayat=21';

Now I want 2.

I can do that by regex: /\d+/. But I don't want to remove it, I want it, how can I do this ?

Answer 1

try this to get capture first digit:

[^0-9]*(\d+)

DEMO

PHP Code:

<?php

$link = 'http://www.example/data/showall.php?quantity=&lang=eng&sura=2&ayat=21';
preg_match('/[^0-9]*(\d+)/',$link,$matches);
echo $matches[1];

?>

Output:

2