CODEWITHSUNDEEP
phpregexpreg-replace
matt
matt

Reputation: 44383

php preg_replace width and height inside of object?

hey guys, a php variable $htmlholds the following object...

<object width="562" height="200">
  <param name="movie" value="http://www.youtube.com/v/rBa5qp9sUOY?version=3">
  <param name="allowFullScreen" value="true">
  <param name="allowscriptaccess" value="always">
  <embed src="http://www.youtube.com/v/rBa5qp9sUOY?version=3" 
         type="application/x-shockwave-flash" 
         width="562" 
         height="200" 
         allowscriptaccess="always" 
         allowfullscreen="true">
</object>

any idea how I could filter the width and height both of the object- and embed-tag to have 100% values?

<object width="100%" height="100%">
  ...
  <embed src="http://www.youtube.com/v/rBa5qp9sUOY?version=3" 
         type="application/x-shockwave-flash" 
         width="100%" 
         height="100%" 
         allowscriptaccess="always" 
         allowfullscreen="true">
</object>`

Thanks for your help!

update:

$chunk = $dom->getElementsByTagName('body')->item(0);

        $objectHtml = '';
        foreach($chunk->childNodes as $node) {
            $objectHtml .= $node->saveXML();
        }

        return $objectHtml;

says: Call to undefined method DOMElement::saveXML()

whereas...

$dom = preg_replace('/^<!DOCTYPE.+?>/', '', str_replace( array('<html>', '</html>', '<body>', '</body>'), array('', '', '', ''), $dom->saveXML()));

works fine! however I get weird
inserted in my sourcecode when using this..

like this:

<!--?xml version="1.0" standalone="yes"?-->
<br>
<br>
<object width="95%" height="75%"><param name="movie" value="http://www.youtube.com/v/rBa5qp9sUOY?version=3"><param name="allowFullScreen" value="true"><param name="allowscriptaccess" value="always"><embed src="http://www.youtube.com/v/rBa5qp9sUOY?version=3" type="application/x-shockwave-flash" width="95%" height="75%" allowscriptaccess="always" allowfullscreen="true"></object>

any idea what I'm doing wrong here?

Upvotes: 0

Views: 3483

Answers (4)

Demian Brecht
Demian Brecht

Reputation: 21378

preg_replace('/(width|height)(=)"([\d]+)"/', '${1}${2}"100%"', $html);

That should do the trick :)

Upvotes: 0

alex
alex

Reputation: 490461

It is often better to use a HTML parser instead of a regex when modifying HTML.

$dom = new DOMDocument;

$dom->loadHTML($str);

$object = $dom->getElementsByTagName('object')->item(0);

$object->setAttribute('width', '100%');
$object->setAttribute('height', '100%');

$embed = $object->getElementsByTagName('embed')->item(0);

$embed->setAttribute('width', '100%');
$embed->setAttribute('height', '100%');

echo $dom->saveXML($dom->getElementsByTagName('body')->item(0));

You probably don't want the element wrapped in body, so do this...

$objectHtml = '';
foreach($chunk->childNodes as $node) {
    $objectHtml .= $dom->saveXML($node, LIBXML_NOEMPTYTAG);
}

Where $chunk is $dom->getElementsByTagName('body')->item(0).

I added the option LIBXML_NOEMPTYTAG, otherwise if you have <span></span> it will be turned into <span />.

If using >= PHP 5.3, use saveHTML() instead.

Upvotes: 5

anon
anon

Reputation:

Is that all that your string will contain? If so, you can use this:

$replace = preg_replace(
            "/(width|height)=\".*?\"/",
            "\${1}=\"100%\"",
            $html
          );

You can tweak the pattern to allow for whitespace between the attribute, = sign, and value as necessary.

If your string will contain more HTML, with their own width/height attributes you don't want replaced, then you'll need a more robust solution.

Upvotes: 0

benck
benck

Reputation: 2052

$html = '<object width="562" height="200"><param name="movie" value="http://www.youtube.com/v/rBa5qp9sUOY?version=3"><param name="allowFullScreen" value="true"><param name="allowscriptaccess" value="always"><embed src="http://www.youtube.com/v/rBa5qp9sUOY?version=3" type="application/x-shockwave-flash" width="562" height="200" allowscriptaccess="always" allowfullscreen="true"></object>';

$pattern = '/(<object[^>]*width=)\".*?(\"[^>]*height=)\".*?(\"[^>]*>.*?<embed[^>]*width=)\".*?(\"[^>]*height=)\".*?(\"[^>]*>.*?<\/object>)/si';
$replace = '\1"100\2"200\3"300\4"400\5';
echo preg_replace($pattern, $replace, $html);

This should work. Set, 100, 200, 300, 400 to your values.

Upvotes: -1

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