replace all "foo" between two HTML tags using REGEX (PHP code)

Question

I want a regex code , to replace all "foo" strings to "bar" , between the html tags pre>< /pre>

here is an example :

< html>
< p> blah blah blah foo try foo< /p>
< pre> foo try foo word foofoo < /pre>
< /html>

shoud be

< html>
< p> blah blah blah foo try foo< /p>
< pre> bar try bar word barbar < /pre>
< /html>

so , that's means all foo between the tags pre should be replaced by .

i tried to use this regex pattern but its not working.

do {
$string = preg_replace('/< pre>([^)]*)foo([^)]*< /pre>)/U', '\1boo\2', $string, -1,$count);
}while($count != 0);
echo $string;

im sorry for my english Thank you,

I wish Stack Overflow had a filter that banned questions containing "HTML" and "regex" in the same sentence. — BoltClock
– BoltClock, Commented May 14, 2011 at 7:48
@BoltClock Or at least a warning poping up when asking a question. Seriously. — alexn
– alexn, Commented May 14, 2011 at 7:49
"I want a code" is not how this site works. What have you tried so far? — mario
– mario, Commented May 14, 2011 at 7:50

BrankoR · Accepted Answer · 2011-05-14 08:16:03Z

5

$string = '< html>
< p> blah blah blah foo try foo< /p>
< pre> foo try foo word foofoo < /pre>
< /html>';
$string = preg_replace('/foo(?=(?:.(?!< pre>))*< \/pre>)/Um', 'boo', $string);
echo $string;

answered May 14, 2011 at 8:16

BrankoR

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Comments

GordonM · Accepted Answer · 2011-05-14 08:01:18Z

2

You could use DOMDocument to extract the text content of your HTML tags, do a simple str_replace on the text and update the DOM.

answered May 14, 2011 at 8:01

GordonM

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3 Comments

Programmer4me Over a year ago

sorry, i want to use only regex pattern to replace all, thanks for your answer .

Gordon Over a year ago

@Programmer why? That's like insisting to use a sharpened spoon instead of a scalpell for surgery. Might work in some cases, but it's still the wrong tool for the job. See Best methods to parse HTML

Andrew Jackman Over a year ago

@Gordon I think a better analogy would be using a scalpell to cut your bread instead of a bread knife. Yeah, sure, you can do it, but to do it properly it will take forever! And you will end up ripping a bunch of the bread (image thats your hair) wondering why its not working right. Or you could just use DOM and str_replace and problem solved, concise and understandable!

Andrew Jackman · Accepted Answer · 2011-05-14 08:02:18Z

1

First, go get Simple HTML Dom

// Create DOM from URL or file
$html = file_get_html('http://www.google.com/');

// Find the first pre (you can change this or find an array based on documentation on website to suit your needs, but I will make it just for the first pre for now
$html->find('pre', 0)->plaintext = str_replace('foo', 'bar', $html->find('pre', 0)->plaintext);

//Echo HTML
echo $html;

answered May 14, 2011 at 8:02

Andrew Jackman

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1 Comment

Gordon Over a year ago

Suggested third party alternatives to SimpleHtmlDom that actually use DOM instead of String Parsing: phpQuery, Zend_Dom, QueryPath and FluentDom.

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