Preg_match pattern inside tag with regex

Question

I'm trying to use a regex to find a string. For example, my text is :

$text="<h2>Introduction of Abdominal aortic aneurysm</h2>
<p>In this section, we will learn about symptom, causes, and treatment of 
AAA</p>
<h2>This is Treatment for a burst AAA</h2><p>.......<p>
<h2>.........</h2>"

I want to find :

$temp="<h2>This is Treatment for a burst AAA</h2>
<p>.......<p>"

I try this pattern :

Preg_match("/<h2(.*?)Treatment(.*?)<h2>/i",$text,$matches);

if i echo $matches[1] it will return:

"Introduction of Abdominal aortic aneurysm</h2>
<p> In this section, we will learn about symptom, causes, and "

and if i echo $matches[2] it will return:

" of AAA<p>"

how to get $matches that match to this sentence :

"<h2>This is Treatment for a burst AAA</h2>"

Actually i want to make a pattern that match a text inside a tag not a

tag.

Answer 1

Instead of using a regex to parse your html, you might use DOMDocument and C14N:

$dom = new DOMDocument();
$text="<h2>Introduction of Abdominal aortic aneurysm</h2>
<p>In this section, we will learn about symptom, causes, and treatment of 
AAA</p>
<h2>This is Treatment for a burst AAA</h2><p>.......<p>
<h2>.........</h2>";

$dom->loadHTML($text);
$elms = $dom->getElementsByTagName("h2");
foreach($elms as $elm) {
    if (strstr($elm->nodeValue, "Treatment") !== false) {
        echo $elm->C14N();
    }
}

That will result in:

<h2>This is Treatment for a burst AAA</h2>

Demo