无法在屏幕上输出缩略图，我得到了干净的白色屏幕，左上方有一点破损的图像 [英] cant output the thumbnail on the screen i get a clean white screen with a little broken image on the top left
本文介绍了无法在屏幕上输出缩略图，我得到了干净的白色屏幕，左上方有一点破损的图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
纯白屏幕甚至无法获取上传表单帮助，这里我的代码没有显示错误.
just white screen not even getting the upload form help heres my code no errors are displayed.
这是我的代码-
<?php
require_once('includes/config.inc.php');
require_once('includes/functions.inc.php');
include("includes/html_codes.php");
session_start();
$username = $_SESSION["username"];
if ($_SESSION['logged_in'] == false) {
// If user is already logged in, redirect to main page
redirect('lo.php');}
?>
<?php
if(isset($_POST['submit'])){
$temporary_name=$_FILES['file']['tmp_name'];
move_uploaded_file($_FILES['file']['tmp_name'],"images/".$_FILES['file']['name']);
$mysqli = new mysqli(DB_HOSTNAME, DB_USERNAME, DB_PASSWORD, DB_DATABASE);
$q = mysqli_query($mysqli,"UPDATE users SET image = '".$_FILES['file']['name']."'WHERE username = '".$_SESSION['username']."'");
}
?>
<!DOCTYPE html>
<html>
<head>
<head>
<title>Profile</title>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="css/main.css"/>
<link rel="stylesheet" href="css/form.css"/>
<link rel="stylesheet" href="css/register.css"/>
<body>
<header>
<?php topBarl(); ?>
</header>
<form action="" method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" name="submit">
</form>
<?php
$mysqli = new mysqli(DB_HOSTNAME, DB_USERNAME, DB_PASSWORD, DB_DATABASE);
$q = mysqli_query($mysqli,"SELECT * FROM users WHERE username = '$username'");
$row = mysqli_fetch_assoc($q);
$width= 275;
$height= 275;
$orig_image = imagecreatefromjpeg("images/".$row['image']);
if (imagesx($orig_image) > imagesy($orig_image)) {
$y = 0;
$x = (imagesx($orig_image) - imagesy($orig_image)) / 2;
$smallestSide = imagesy($orig_image);
}
else {
$x = 0;
$y = (imagesy($orig_image) - imagesx($orig_image)) / 2;
$smallestSide = imagesx($orig_image);
}
$image_p = imagecreatetruecolor($width, $height);
Imagecopyresampled($image_p,$orig_image,0,0,$x,$y,$width,$height,$smallestSide,$smallestSide);
header( 'Content-Type: image/jpeg' );
imageJPEG($image_p, NULL, 100);
imagedestroy($image_p);
imageDestroy($orig_image);
?>
请记住，不会显示任何错误. 提前致谢. 如果我删除Imagecopyresampled下面的代码，我的意思是从标题到imagedestroy行 我只得到上载表格，但没有删除任何内容，除了页面左上方的一小点破损图像之外，什么也没得到.
remember no errors are displayed. thanks in advance. if i delete the code below the Imagecopyresampled i mean from header to imagedestroy line i get the upload form only but without deleting anything i get nothing but a small broken image on top left of the page.
推荐答案
您正在混合两种无法混合使用的不同方法:
You are mixing two different approaches that you cannot mix:
- 在代码中间输出html
- 在代码末尾输出图像
您必须选择:
- 您输出html.然后，您必须将图像另存为图像，并将其包含在图像标签中，例如
<img src="your_freshly_saved_image.jpg"> - 您输出图像.然后，您将无法在此脚本中输出其他任何内容，而另一个html/php页面中的图像源将是您的脚本:
<img src="your_image_script.php?with_some_vars=perhaps">
- You output html. Then you have to save the image as an image and include it in an image tag like
<img src="your_freshly_saved_image.jpg"> - You output an image. Then you cannot output anything else in this script and the source of an image in another html / php page would be your script:
<img src="your_image_script.php?with_some_vars=perhaps">
这篇关于无法在屏幕上输出缩略图，我得到了干净的白色屏幕，左上方有一点破损的图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
