ereg_replace for PHP 5.3 +?

Question

I\'ve seen a solution for not having to rework usage of the ereg function for PHP 5.3: Good alternative to eregi() in PHP

It uses if(!function_exists....

Answer 1

Use the PCRE function preg_replace instead:

preg_replace("//", "", $str);
preg_replace("/[^a-z,A-Z]/", "", $str);

POSIX ERE is (nearly) a complete subset of PCRE. So you can use (nearly) any POSIX ERE regular expression with a PREG implementation. See the Regular Expression Flavor Comparison for futher details.