不同的模式但结果是一样的

Question

I want to get the input values in the string. I use two different patterns for this. But the result is the same. What is the reason of this?

$string = 'hello world is .. <input type="text" id="level" value="5">  <input type="text" id="option" value="24"> .. tyhis is example text.';

$pattern = '/<input(?:.*?)id=\"option\"(?:.*)value=\"([^"]+).*>/i';
$pattern2 = '/<input(?:.*?)id=\"level\"(?:.*)value=\"([^"]+).*>/i';

preg_match($pattern, $string, $matches);
preg_match($pattern2, $string, $matches2);
echo $matches[1];
echo "<br>";
echo $matches2[1];

Result:

24

24

What is the reason of this?

Answer 1

As @Andreas already stated your patterns contain greedy sections which swallow too much of the input. You need to reduce that:

<?php
$string = 'hello world is .. <input type="text" id="level" value="5">  <input type="text" id="option" value="24"> .. this is example text.';

$pattern1 = '/<input\s.*\sid=\"option\"\s.*?value=\"([^"]+).*>/i';
$pattern2 = '/<input\s.*\sid=\"level\"\s.*?value=\"([^"]+).*>/i';


preg_match($pattern1, $string, $matches1);
preg_match($pattern2, $string, $matches2);

var_dump($matches1[1], $matches2[1]);

The obvious output is:

string(2) "24"
string(1) "5"