Selecting background url from style attribute with XPATH (and PHP)

Question

I'd like to select only the url from this background image style attribute, is that possible with XPATH?

 <a href="http://www.test.com" style="background-image: url('http://www.test.com/hello.jpg');">test</a>

i have something like

$url  = $xpath->query('//a//@style');

it will give the full content of the style attribute, I only want to select the content of the url('') — Thomas
– Thomas, Commented Sep 7, 2011 at 11:53
what's inside the style attribute is no longer part of the DOM, so it's not a job for XPath. You'd find a CSS parser to do that... I'm not aware of a solution for that as common as XPath or DOMDocument, maybe this speficic case is easiest done with a regex. — Pekka
– Pekka, Commented Sep 7, 2011 at 11:53
Good question, +1. See my answer for a complete, short and easy, oneliner XPath expression that produces exactly the wanted URL. — Dimitre Novatchev
– Dimitre Novatchev, Commented Sep 7, 2011 at 17:56

Dimitre Novatchev · Accepted Answer · 2011-09-07 17:54:56Z

1

Use:

substring-before(substring-after(@style, "'"),
                 "'"
                )

XSLT-based verification:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>
 <xsl:strip-space elements="*"/>

 <xsl:template match="/*">
     "<xsl:value-of select=
     "substring-before(substring-after(@style, &quot;&apos;&quot;),
                       &quot;&apos;&quot;
                       )
     "/>"
 </xsl:template>

</xsl:stylesheet>

when this transformation is applied on the provided XML document:

 <a href="http://www.test.com" style=
 "background-image: url('http://www.test.com/hello.jpg');">test</a>

the wanted, correct result is produced:

 "http://www.test.com/hello.jpg"

answered Sep 7, 2011 at 17:54

Dimitre Novatchev

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Comments

mickmackusa · Accepted Answer · 2022-10-10 21:10:24Z

0

$arrHolder = array();
foreach ($xpath->query('//*[@style]') as $node) {
    if (strpos($node->getAttribute('style'), 'background:url') !== FALSE) {

        array_push($arrHolder, $node->tagName . " = " . $node->getAttribute('style'));
    }
}
echo '<pre>';
    print_r($arrHolder);
echo '</pre>';

edited Oct 10, 2022 at 21:10

mickmackusa♦

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answered Oct 14, 2017 at 6:52

Danish Akhtar

11 bronze badge

1 Comment

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