How to remove javascript tags in php

In web development, Javascript is a very commonly used scripting language. It has strong interactivity and dynamics, and is also widely used in website development.

However, for some specific needs, we need to remove all Javascript tags from the web page. In this case, PHP is a great option that can easily strip out Javascript tags.

The following is a simple PHP function that can remove all Javascript tags from the page:

function remove_javascript($html) {
    $pattern = '/<script>]*>(.*?)<\/script>/is&#39;;
    $replace = &#39;&#39;;
    return preg_replace($pattern, $replace, $html);
}</script>

The above function uses regular expressions to match the Javascript tags in the page, and Replace it with an empty string. This function can be placed directly in the PHP file and then called in the page where the Javascript tag needs to be removed.

In addition to using PHP functions, we can also use some open source PHP libraries to remove Javascript tags. The following are some commonly used open source PHP libraries:

1. DOMDocument: This is a Document Object Model (DOM) library that comes with PHP. It can convert HTML documents into a tree structure, and then we can use Node manipulation method to remove Javascript tags.

$doc = new DOMDocument();
$doc->loadHTML($html);
$scripts = $doc->getElementsByTagName('script');
foreach ($scripts as $script) {
    $script->parentNode->removeChild($script);
}
$html = $doc->saveHTML();

2. PHP Simple HTML DOM Parser: This is a third-party PHP library that provides some simple and easy-to-use DOM operation methods, which can operate HTML documents very conveniently.

include 'simple_html_dom.php';
$dom = str_get_html($html);
$scripts = $dom->find('script');
foreach ($scripts as $script) {
    $script->outertext = '';
}
$html = $dom->save();

Using the Simple HTML DOM Parser library can more easily remove Javascript tags. We only need to introduce the library in the PHP file and use the find method to find all Javascript tags.

In summary, if we need to remove all Javascript tags from the web page, PHP is a very practical method. We can use functions written by ourselves, or we can use some open source PHP libraries to complete it. In practical applications, we should choose the most appropriate method according to the specific situation.

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