100分求正则表达式 急。在线等

Question

  preg_match_all('/1(.+)2/U',$str,$matches);
  print_r($matches[1]);

Answer 1

<?php
//By mrshelly
$str="1fdsafdsa2fdsa1fdsafdsa2fdsafdsa1fdsafdsa2fdsafdsa1fdsafdsa2fdsafdsa1fdsafdsa2fdsafdsaf1fdsafdsa21fdsafds2";
print_r(split(' ',trim(str_replace(array('1','2'),' ',$str))));
?>

Answer 2

preg_match_all('/1(.*?)2/U',$str,$matches); 
  print_r($matches[1]); 

Answer 3

$str="1fdsafdsa2fdsa1fdsafdsa2fdsafdsa1fdsafdsa2fdsafdsa1fdsafdsa2fdsafdsa1fdsafdsa2fdsafdsaf1fdsafdsa21fdsafds2";
print_r(split(' ',trim(str_replace(array('1','2'),' ',$str))));
这个不符合吧,这样会把1和1之间,2和2之间,1和2之间,2和1之间的都包括了,而不是楼主的1和2之间
preg_match_all('/1(.+)2/U',$str,$matches); 
print_r($matches[1]);
这个看似可以,但如果中间有连续两个1就会截错了(x1xxx1xxx2x这样的)
我来写一个,呵呵
preg_match_all('/1([^1.]+)2/U',$str,$matches); 
print_r($matches[1]);