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What modifications can be made to the existing BBCode parser to improve PHP code highlighting functionality?

The existing BBCode parser may not be properly highlighting PHP code, which can make it difficult for users to read and understand the code. To improve PHP code highlighting functionality, we can modify the parser to correctly identify and apply syntax highlighting to PHP code blocks. This can be achieved by adding a specific rule to the parser that recognizes PHP code tags and applies the appropriate syntax highlighting.

php 
// Add a rule to the existing BBCode parser to properly highlight PHP code blocks
$bbcode->addRule('php', [
    'template' => '<pre><code class="language-php">{param}</code></pre>',
    'allow_in' => ['listitem', 'block', 'columns', 'spoiler'],
]);

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