What is the error message indicating when using preg_replace with the e modifier in PHP?

The error message indicates that the 'e' modifier is deprecated in PHP and should not be used. To solve this issue, you can use anonymous functions or the preg_replace_callback function instead. 

// Using preg_replace_callback to replace with an anonymous function
$string = "Hello, world!";
$pattern = '/world/';
$replacement = 'PHP';
$result = preg_replace_callback($pattern, function($matches) {
    return 'PHP';
}, $string);

echo $result;

Keywords

preg_replace e modifier error message PHP regular expressions

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