Replacing ereg_replace() with preg_replace() in PHP for Regex Handling
If you’ve kept an old PHP app alive long enough, you’ve probably hit the wall: you bump the server to PHP
regular expressions
Transitioning from ereg to preg_match in PHP: Best Practices
You upgrade a server to PHP 7, and a script that ran fine for a decade dies with Call to undefined
30 Days of JavaScript: Regular Expressions in JavaScript, Day 9
You’ve written the loop before. Check whether a string holds a phone number, then a second pass for the dashes, then