How do I write the Regular Expression in PHP to match HTML <p> that are AFTER the first <H1> tag?
For example the following states if not equal to the expression
if(!preg_match_all('#<p(.*?)<\/p>#', $page_content, $matches)
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Jay Blanchard
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1You should *never* parse HTML with regex. Use [a PHP DOM parser](http://simplehtmldom.sourceforge.net/) instead. – Jay Blanchard Oct 12 '16 at 21:24
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If you really had to do this in regex you'll need the `h1` in your regex, and you'll want the `s` modifier so the `.` extends to new lines. – chris85 Oct 12 '16 at 21:30
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Where would I add the H1 and s modifier? – StoryTech Oct 12 '16 at 21:33
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Use an HTML parser, eg: http://simplehtmldom.sourceforge.net/ https://github.com/paquettg/php-html-parser – 1252748 Oct 12 '16 at 22:15
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In properly written HTML (i.e HTML that isn't designed to break all sorts of parsers by abusing the loopholes in SGML specification), all <h1>s will have corresponding closing tags. That means you can simply look for a <p> preceded by a </h1>.
<\/h1>[\s\S]*?<p>([\s\S]*?)<\/p>
Here's how the above regex works, and a proof of concept:
<\/h1>matches</h1>literally[\s\S]*?matches all characters until the next<p><p>matches<p>literally([\s\S]*?)matches all characters until the next</p>(note the capturing group - this group contains what you want)<\/p>matches</p>literally
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