用于查找多行表单数据的正则表达式（php）

Question

I try (without success) to make a regex for find a submit button even if button code is in one two or more lines.

I use now this patter

/<(button|input)(.*type=['\"](submit|button)['\"].*)?>/i

and works fine if the button code is in one line

<input type="submit" name="mybutton" class="button_class" value="Submit" title="Click Me" />

I want to make it work if my button code look like

<input type="submit" name="mybutton"

class="button_class" value="Submit"

title="Click Me" />

Thanks

Answer 1

Don't use a regular expression to parse HTML.

RegEx match open tags except XHTML self-contained tags

Learn xpath, and use a parser.

EDIT Added some code to insert before.

    $dom = new DOMDocument();
    @$dom->loadHTML($html);
    $x = new DOMXPath($dom);        
    foreach($x->query("//input[@type='submit']") as $node)
    {
         $newNode = $dom->createElement("img");
         $newNode->setAttribute("src","/loading.gif");
         $node->insertBefore($node);    
    }
    $output = $dom->saveHTML();