計數X字符的數量

Question

我正在試驗explode（）失敗的東西，所以我想嘗試其他的東西。如果我有一個字符串，我怎麼能算在它的字符被假設的數量comma在,

Answer 1

嘗試substr_count()：

substr_count($text, ','); 

Answer 2

您可以使用count_chars

例從PHP手冊：

$data = "Two Ts and one F."; 
foreach (count_chars($data, 1) as $i => $val) { 
    echo "There were $val instance(s) of \"" , chr($i) , "\" in the string.\n"; 
} 

輸出（codepad）：

There were 4 instance(s) of " " in the string. 
There were 1 instance(s) of "." in the string. 
There were 1 instance(s) of "F" in the string. 
There were 2 instance(s) of "T" in the string. 
There were 1 instance(s) of "a" in the string. 
There were 1 instance(s) of "d" in the string. 
There were 1 instance(s) of "e" in the string. 
There were 2 instance(s) of "n" in the string. 
There were 2 instance(s) of "o" in the string. 
There were 1 instance(s) of "s" in the string. 
There were 1 instance(s) of "w" in the string.