What is the issue with the /e modifier in PHP 5.5 upgrade?

The issue with the /e modifier in PHP 5.5 upgrade is that it has been deprecated and removed from the PCRE library. To solve this issue, you can replace the /e modifier with the preg_replace_callback function, which allows you to use a callback function to process the matched elements. 

// Example code snippet to replace /e modifier with preg_replace_callback
$pattern = '/\b(\w+)\b/e';
$string = 'Hello World';
$result = preg_replace_callback($pattern, function($matches) {
    return strtoupper($matches[1]);
}, $string);

echo $result; // Output: HELLO WORLD

Keywords

/e modifier PHP 5.5 upgrade preg_replace deprecated

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