$html = "abc,abc,abc,abc,......"; echo preg_replace('/abc/e','++$i',$html);
$str = 'abc,abc,abcabc'; $i=1; $newstr = preg_replace_callback('------解决方案--------------------abc------解决方案--------------------', function($match) use(&$i){return $i++;}, $str); echo $newstr;