句子出现在另一个句子的数量（在PHP）

Question

我正在寻找一种方式来找到另一句话

例如（我有）句出现的次数：

你好兄弟，我一直在等待告诉你一些非常重要的东西。再见哥哥，我会看到你下周

，我正在寻找：

哥哥，我

这应该送给我的结果：

结果= 2

Answer 1

$str = "Hello brother, I have been waiting to tell you something very important. Good bye brother, I will see you next week" 

// explode the string using delimiter 'brother, I', the no of occurance of 'brother, I' will be one less than than the number of element in resultant array. 
eg 

$resArr = explode("brother, I","$str"); 

$ans = count($resArr) -1 

//assuming your input string is not starting or ending with delimiter ie 'brother, I' in this case 

Answer 2

使用substr_count()功能

$str = "Hello brother, I have been waiting to tell you something very important. Good bye brother, I will see you next week"; 

echo substr_count($str, 'brother, I'); // 2 

如果您需要区分大小写的方式，只要两个字符串大写或小写：

echo substr_count(strtolower($str), strtolower('brother, I')); // 2