PHP5.3x ereg_replace改成preg_replace？

Question

PHP5.3x ereg_replace改成preg_replace

Answer 1

$GLOBALS['index'] = 0;$search = "abcabcabcabc";$replace = preg_replace_callback("/a/", function($matches){return $GLOBALS['index']++ % 2 ? '*' : $matches[0];}, $search );var_dump($replace);