출력 후 PHP 리디렉션

Question

어떤 이유로이 PHP 문이 지정된 페이지로 리디렉션되지 않습니다. 그것은 여기 나에게이 오류

Warning: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/srimeru/emailpage.php:203) in /Applications/XAMPP/xamppfiles/htdocs/srimeru/emailpage.php on line 229 

를 제공이 섹션 내 코드입니다 :

<?php 
if(!isset($_POST["submit"])){ 
    ?> 
    <form method="post" action="<?php echo $_SERVER["PHP_SELF"];?>"> 
     <p>From: <input type="text" name="from"></p><br> 
     <p>Subject: <input type="text" name="subject"></p><br> 
     <p>Message: <br><textarea rows="10" cols="40" name="message"></textarea></p><br> 
     <input type ="submit" name="submit" value="Email"> 
    </form> 
    <?php 
} else { 
    $from = test_input($_POST["from"]); 
    $subject = test_input($_POST["subject"]); 
    $message = test_input($_POST["message"]); 

    $con = mysqli_connect("localhost", "root", "chendu", "SriMeru"); 
     if (mysqli_connect_errno()){ 
      echo "Failed to connect to Server"; 
     } 
    $sql = "SELECT email FROM users"; 
    $result = mysqli_query($con, $sql); 
while ($row = mysqli_fetch_array($result)){ 
     mail($row['email'], $subject, $message,"From: $from\n"); 
     echo $row['email'] . $subject . $message . $from . "<br>"; 
    } 
    echo"Successful Email"; 
    header('location: http://localhost/srimeru/emailpage.php'); 
    exit(); 
} 


function test_input($data){ 
    $data = trim($data); 
    $data = stripslashes($data); 
    $data = htmlspecialchars($data); 
    return $data; 
    } 
?> 

Answer 1

당신은 작업 위치 헤더를 얻기 위해 echo"Successful Email"; 문을 제거해야합니다.