What are the advantages and disadvantages of using preg_replace_callback() in PHP for manipulating strings that contain HTML tags and special characters?

When manipulating strings that contain HTML tags and special characters in PHP, using preg_replace_callback() can be advantageous as it allows for more complex string manipulation with the ability to use a callback function for each replacement. This can be useful for performing dynamic replacements or transformations on the matched substrings. However, a disadvantage of using preg_replace_callback() is that it can be more complex and harder to maintain compared to simpler string manipulation functions like str_replace(). 

<?php
$string = '<p>Hello, <strong>world</strong>!</p>';
$newString = preg_replace_callback('/<(\w+)>/', function($matches) {
    return strtoupper($matches[0]);
}, $string);

echo $newString;
?>

Keywords

preg_replace_callback PHP strings HTML tags special characters

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