PHPda atributlarni regular ifodalar orqali tahlil qilishda tirnoq muammosi

Atribut tirnoqlari nafaqat qo'sh, balki bittalik ham bo'lishi mumkin:

<img src="1.png">
<img src='2.png'>

Keling, buni regular ifodamizda hisobga olaylik:

<?php
	preg_match_all('#src\s*=\s*(["\'])(.+?)\1#su', $str, $matches, PREG_PATTERN_ORDER);
?>

Hammasi ishlashini tekshiramiz:

<?php
	var_dump($matches[2]);
?>

Barcha href atributlari tarkibini toping:

<a href="page1.html">link1</a>
<a href='page2.html'>link2</a>
<a href =  'page3.html'>link3</a>