Cannot modify header information headr函数问题,代码很简单
login.php
<br /> <html><br /> <title><br /> 登陆界面<br /> </title><br /> <head><br /> <meta http-equiv="content-type" content="text/html;charset=utf-8" /><br /> </head><br /> <body><br /> <form action="loginController.php" method="post"><br /> <table><br /> <tr><td>用户名:</td><td><input type="text" name="username"/></td></tr><br /> <tr><td>密码:</td><td><input type="text" name="password"/></td></tr><br /> <tr><td><input type="submit" value="登陆"/><td><input type="reset" name="重新填写"/></td></tr><br /> </table><br /> </form><br /> </body><br /> </html><br /> <br /> loginController.php<br /> <html><br /> <title><br /> 验证控制器<br /> </title><br /> <head><br /> <meta http-equiv="content-type" content="text/html;charset=utf-8" /><br /> </head><br /> <body><br /> <?php<br /> $username=$_REQUEST['username'];<br /> $password=$_REQUEST['password'];<br /> if($username=='123'&&$password=='123'){<br /> header("location:Manage.php");<br /> exit();<br /> } else{<br /> echo '账号密码有误';<br /> }<br /> ?><br /> </body><br /> </html><br /> <br /> <html><br /> <title><br /> 管理界面<br /> </title><br /> <head><br /> <meta http-equiv="content-type" content="text/html;charset=utf-8" /><br /> </head><br /> <body><br /> <h1>欢迎管理员</h1><br /> </body><br /> </html><br /> <br /> 输入用户名密码123<br /> 错误提示如下:<br /> Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\www\sqlInjcetion\loginController.php:9) in C:\wamp\www\sqlInjcetion\loginController.php on line 13<br /> <br /> 求解!<br /> 另外3个php文件都是utf-8编码<br />