刪除????或更多與preg_replace

Question

我想刪除四個或更多的問號。

我現在使用這一權利：

preg_replace('{\\?+}', '', $text); 

但這確實刪除所有問號。

Answer 1

// Use {4,} to indicate 4 or more of the preceding thing 
$pattern = '~\?{4,}~'; 

$str = "I have 3??? and that isn't enough"; 
$str2 = "I have 5????? and that is enough"; 

// Won't replace only 3 ? 
echo preg_replace($pattern, '', $str); 
// I have 3??? and that isn't enough 

// Will replace 5 ? 
echo preg_replace($pattern, '', $str2); 
// I have 5 and that is enough