CODEWITHSUNDEEP
phpreplacepreg-replace
user390480
user390480

Reputation: 1665

PHP replace opening div or span by class

Using something like PHP's str_replace, preg_replace, or something else, I need to find all opening div or spans in a very long string that contain a certain class and replace the entire opening div or span with some other text. For example:

If I have the following div in my string:

...lots of text <div style="display: inline;" class="MyClass">zoom</div> other text...

I want to find that div by the class name in the entire string and replace that div with "blah blah blah." I can find the closing tag easily so I'm not worried about that one.

Thank you!

Upvotes: 1

Views: 4224

Answers (3)

chuckieDub
chuckieDub

Reputation: 1835

This replaces all the text between "MyClass" div tags and stores the new HTML in $string.

   <?php

$string = '<div class="MyClass">Change this text.</div><br /><div class="MyClass">and this text too</div>';
$pattern = "|(?<=<div class=\"MyClass\">)(.*?)(?=<\/div>)|";
$replace = 'blah blah blah';

$matches = array();
preg_match_all($pattern, $string, $matches);

foreach ($matches[0] as $value) {
    $string = str_replace($value, $replace, $string);
}

echo $string; // <div class="MyClass">blah blah blah</div><br /><div class="MyClass">blah blah blah</div>

?>

To replace everything including the div tags, the regex pattern would be $pattern = "|(<div class=\"MyClass\">.*?<\/div>)|";

Upvotes: 2

Kyle
Kyle

Reputation: 4014

You should use DOMDocument. Using regular expression will over complicate things. See my sample code below on how you would accomplish this.

<?php
// This is our HTML
$html = <<<HTML
<html>
    <body>
        ...lots of text <div style="display: inline;" class="MyClass">zoom</div> other text...
    </body>
</html>
HTML;

// This is the replacement.
$replacement = <<<HTML
    Blah blah blah
HTML;

// Create a new DOMDocument with our HTML.
$document = new DOMDocument;
$document->loadHtml($html);

// Create a new DOMDocument with the replacement text.
$replacementDocument = new DOMDocument;
$replacementDocument->loadXml('<root>' . $replacement . '</root>');
// Import the nodes from the replacement document into the existing document.
$newNodes = array();
foreach($replacementDocument->firstChild->childNodes as $childNode){
    $newNodes[] = $document->importNode($childNode,true);
}
// Create an xpath use for querying.
$xpath = new DOMXpath($document);
// Find all nodes that have a class with "MyClass"
foreach($xpath->query('//*[contains(@class,\'MyClass\')]') as $element){
    // Remove all the nodes inside this node.
    foreach($element->childNodes as $childNode){
        $element->removeChild($childNode);
    }
    // All all the new nodes.
    foreach($newNodes as $newNode){
        $element->appendChild($newNode);
    }
}
// Echo the new HTML
echo $document->saveHtml();
?>

Upvotes: 1

user636044
user636044

Reputation:

Try using a tool like phpQuery to select the elements you want and then manipulate them.

http://code.google.com/p/phpquery/

Doing this with regular expressions would be unnecessarily painful.

Upvotes: 1

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