php - include 和 header 函数不能在单个 php 文件中一起工作

Question

我试图在完成任务后为数据库包含 config.php 文件，重定向到其他页面，但它显示此错误消息。

"Warning: Cannot modify header information - headers already sent by (output started at /home/prasan/public_html/theyplay.in/texttospeech/config.php:16) in /home/prasan/public_html/theyplay.in/texttospeech/input.php on line 14"

<?php
include("config.php");  
try {

$mi = $_POST['main'];
$i = $_POST['item'];

$dbo->query("INSERT INTO LD (mainitem, subitem, item,fav)VALUES ('$mi','$i',0)") ;

} catch (Exception $e) {
echo 'Caught exception: ',  $e->getMessage(), "\n";
}
header("Location: index.php");
?>  

编辑:config.php

<?php
$dbhost_name = "localhost";
$database    = "rrr";
$username    = "rrr";
$password    = "rrr";
try {
    $dbo = new PDO('mysql:host=' . $dbhost_name . ';dbname=' . $database, $username, $password);
}
catch (PDOException $e) {
    print "Error!: " . $e->getMessage() . "<br/>";
    die();
}
?>

Answer 1

header 重定向放在 try 里面。因为你在 header 函数之前有一个 echo

<?php
include("config.php");  
try {

    $mi = $_POST['main'];
    $i = $_POST['item'];

    $dbo->query("INSERT INTO LD (mainitem, subitem, item,fav)VALUES ('$mi','$i',0)") ;

    header("Location: index.php");

} catch (Exception $e) {
    echo 'Caught exception: ',  $e->getMessage(), "\n";
}

?>