需求是：使用者提交表單時屏蔽敏感詞的功能。其中敏感詞來自伺服器端同一路徑下的ciku.txt，敏感詞通過"|"串連，例如"g|c|a"，提交表單時替換敏感詞，更重要的是，需要保持表單文本域中使用者輸入的多個空格及換行的樣式，並原樣輸出。php代碼如下：
<?phpheader("Content-type:text/html;charset=utf-8");if($_POST){ $pattern = array( '/ /', //半形下空格 '/ /', //全形下空格 '/\r\n/',//window 下分行符號 '/\n/', //Linux，Unix 下分行符號 ); $replace = array(' ',' ','<br />'); $message=preg_replace($pattern, $replace, $_POST['message']); $cikuStr=file_get_contents('ciku.txt'); $cikuArr=explode('|',$cikuStr); $liuyan=str_replace($cikuArr, "**",$message); echo '您的留言是：<br>'.$liuyan;}?>
1<!--這是表單頁面代碼--> <body> <form name="message_board" id="message_board" method="post" action="timu.php"> <textarea name="message" id="message" cols="50" rows="10" > "http://www.cnblogs.com/phpdream/"---勇往直泉 </textarea><br/> <input type="submit" value="提交留言" id="submitMessage" onclick= /> </form></body>
效果如下所示：
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