When should one choose preg_replace over str_replace in PHP for string manipulation?

When dealing with more complex string manipulations that involve regular expressions or patterns, it is better to use preg_replace in PHP instead of str_replace. preg_replace allows for more advanced search and replace functionalities, making it suitable for tasks like pattern matching, case-insensitive replacements, and more intricate string modifications. 

// Using preg_replace for advanced string manipulation
$string = "Hello, World!";
$newString = preg_replace('/\b(\w)(\w+)\b/', '$2$1', $string);
echo $newString; // Output: "eHllo, dlorW!"

Keywords

preg_replace str_replace PHP string manipulation regex

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