使用php从长字符串中删除特定字符串

Question

How do I remove {SEP}, date, name, colon(:) from this $string using php ?

$string = "{SEP}09-27-2014 19:38 PM alex : hmm..{SEP}{SEP}09-27-2014 20:04 PM alex : note here..{SEP}{SEP}09-27-2014 20:05 PM alex : testing{SEP}
{SEP}09-27-2014 20:07 PM alex : 1{SEP}{SEP}09-27-2014 20:29 PM alex : abc{SEP}{SEP}09-27-2014 20:30 PM alex : nice..{SEP}{SEP}09-27-2014 
20:32 PM alex : checking by pressing the save button.{SEP}{SEP}09-27-2014 20:32 PM alex : Ok now check without save button.{SEP}";

so that it will be look like this :

hmm.. note here..testing 1 abc nice..checking by pressing the save button. Ok now check 
without save button.

Answer 1

preg_replace would be a good place to start:

echo preg_replace("/\{SEP\}(.+?)\s:\s(.+?)\{SEP\}/m", "$2", $string);