[請益] 如何判斷字串裡是否有某個字
例如: "Typhoon brings a lot of rain"
想要判斷這句話裡是否有 a 或是 ai
請問要用哪個函式比較快呢
我知道可以使用迴圈搭配explode完成
但是因為要判斷的字有點多
所以想說看有沒有哪個函式可以直接判斷
例如 if(XXX("a","Typhoon brings a lot of rain"))
想要問的就是XXX
當然如果有其它方式也歡迎指教~
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