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                preg\_match(正則,目標內容,匹配結果\[,下標標志\]) 正則:設置好的正則表達式 目標內容:被匹配的目標字符串內容 匹配結果:此變量是引用類型,用于接收匹配到的結果,結果是array數組內容(array()空數組表示沒有匹配到內容) 下標標志:可選值為PREG\_OFFSET\_CAPTURE,表示同時返回匹配結果在目標字符串中的下標信息。該參數會更改返回結果數組的維數。 preg\_match()函數設置第四個參數的使用(不常用): ![Image](https://box.kancloud.cn/8b4413ea2b7daac06eac81b938ccebc5_512x214.png)
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