CODEWITHSUNDEEP
phphtmlregexhtml-parsing
Jonny White
Jonny White

Reputation: 875

Replacing words in a block of HTML code without changing the HTML

Let's say I have block of HTML where I want to do a find and replace on the content before echoing out to the screen.

How do I ensure I don't change the HTML but just change the content (in PHP).

For example, if I had this:

<div class='Hello'>Hello</div>

and I wanted to replace all the 'Hello' words in the content with 'Hi' I would want to get this result:

<div class='Hello'>Hi</div>

At the moment I am using preg_replace, e.g. 

$new_code = preg_replace(array("/Hello/"), array("Hi"), $code);

But this would give me the result

<div class='Hi'>Hi</div>

Upvotes: 0

Views: 193

Answers (4)

Martin Hearn
Martin Hearn

Reputation: 26

Don't use regex to find text in HTML use a DOM parser instead:

You could use DomDocument but be careful it will do strange things with partial HTML, but here's an example to get you going:

$dom = new DOMDocument();
$dom->loadHTML("<html><body><p>Hello</p></body></html>");

$els = $dom->getElementsByTagName('*');

foreach ( $els as $el ) {

    if (preg_replace("/Hello/","Hi",$el->nodeValue))
    {
        $el->nodeValue =preg_replace("/Hello/","Hi",$el->nodeValue);
    }

} 

echo $dom->saveHTML();

or Simple HTML DOM may meet your needs:

Example from site:

$html = str_get_html('<div class='Hello'>Hello</div>');

$html->find('div', 0)->innertext = 'Hi';

echo $html;

Upvotes: 1

kums
kums

Reputation: 2691

Try this:

<?PHP

$html = '<div class="HeLLo" id="HEllO">Hello how to say "hEllo"
         for heLlo world in a helLo world of hellO</div>';

echo preg_replace('/(hello)(?![^>](\s*\w+=".*")*\s*>)/i', "Hi", $html);

?>

Upvotes: 0

B W
B W

Reputation: 702

Try using this assertion (see the answer to this question) to only match text that occurs between > and <:

$new_code = preg_replace(array("/(Hello)(?=[^>]*(<|$))/"), array("Hi"), $code);

Upvotes: 0

RNK
RNK

Reputation: 5792

If you are looking forward to change from Hello to Hi then,

$new_code = preg_replace(array("/\>Hello/"), array(">Hi"), $code);

Upvotes: 0

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