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                #### 一、正則表達式過濾字符串 (一)PHP過濾字符串 >[info] 需求(1):在一大推HTML字符中,獲取html的title標簽: ~~~ if (preg_match("/.*<title.*?>(.*)</title>.*/i",$string, $match)){ echo "標題是:".$match[1]; } ~~~ /i表示不區分大小寫 備注:和重寫一樣,正則表達式()中為需要獲取到的字符串,使用$match[1]獲取。 >[info] 需求(2):根據UA獲取安卓版本號 ~~~ if (preg_match("/Android ([\d.]+)/i", $this->agent ,$match)){ if(!empty($match[1])){ $this->platform = "Android ".$match[1]; } } ~~~ > 常用函數 preg_quote:轉義正則表達式字符 輸入:'$40 for a g3/400' 輸出:\\$40 for a g3\\/400
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