Question

我正在尝试创建一个社交网站，我希望用户能够上传图片。我之前得到过这方面的帮助但是（就像一个白痴）我错误地删除了代码。我试图让用户上传图片，但这就是我得到的：

关于更改个人资料图片按钮的这个方块是我想要看到的图片，但我不是。当用户注册时，他们有一个名为default.jpg的默认个人资料图片，但没有显示。我把它作为我数据库中userPic的默认值。

profile.php：

<form id="form2" method="post" enctype="multipart/form-data">
    <p id="p1">Change profile picture:</p> <br />
    <input type="file" name="fileToUpload" id="fileToUpload"><br />
    <br><input id="sub1" type="submit" value="Change profile picture" name="change"><br />
</form>

<center><h5><?php echo $_SESSION['username']; ?></h5></center>

<?php
$username = isset($_SESSION['username']) ? $_SESSION['username'] : "";

$info = date('Y-m-d_H-i-s');

if (!empty($username)) {
    if (isset($_FILES['change'])) {

        $errors = array();
        $file_name = $_FILES['image']['name'];
        $file_size = $_FILES['image']['size'];
        $width = 500;
        $height = 500;
        $file_tmp = $_FILES['image']['tmp_name'];
        $file_type = $_FILES['image']['type'];
        $tmp = explode('.', $_FILES['image']['name']);
        $file_ext = strtolower(end($tmp));

        $extensions = array("jpeg", "jpg", "png");

        if (in_array($file_ext, $extensions) === false) {
            $errors[] = "extension not allowed, please choose a JPEG or PNG file.";
        }

        if ($file_size > 2097152) {
            $errors[] = 'File size must be 2 MB';
        }

        if ($width > 500 || $height > 500) {
            // Cancel upload
        }

        if (empty($errors) == true) {
            move_uploaded_file($file_tmp, "uploads/" . date('Y-m-d_H-i-s') . $file_name);

            $store = "UPDATE users SET userPic='$file_name' AND date_time='" . $info . "' WHERE username='$username'";

            if (mysqli_query($conn, $store)) {

            } else {
                echo "Update failed!";
            }
        } else {
            print_r($errors);
            echo"Couldn't upload picture";
        }
    }
    ?>

    <?php
    $getimg = mysqli_query($conn, "SELECT userPic & date_time FROM users WHERE 
username='$username'");
    $rows = mysqli_fetch_array($getimg);
    $img = $rows['userPic'] ['date_time'];
    ?>

    <?php
} else {
    echo "Invalid Username";
}
?>

<img id="myImg" src="uploads/<?php echo $img ?>" alt="<?php echo $img ?>" width="200" height="150">

更新!! ：

<form id="form2" method="post" enctype="multipart/form-data">
<p id="p1">Change profile picture:</p> <br />
<input type="file" name="fileToUpload" id="fileToUpload"><br />
<br><input id="sub1" type="submit" value="Change profile picture" name="change"><br />
</form>

<center><h5><?php echo $_SESSION['username']; ?></h5></center>

<?php

$username = isset($_SESSION['username']) ? $_SESSION['username'] : "";

$info = date('Y-m-d_H-i-s');

if(!empty($username))
{
    if (isset($_FILES['fileToUpload'])) {

      $errors= array();
      $file_name = $_FILES['fileToUpload']['name'];
      $file_size = $_FILES['fileToUpload']['size'];
      $width = 500;
      $height = 500;
      $file_tmp = $_FILES['fileToUpload']['tmp_name'];
      $file_type = $_FILES['fileToUpload']['type'];
      $tmp = explode('.',$_FILES['fileToUpload']['name']); $file_ext=strtolower (end ($tmp));

      $extensions= array("jpeg","jpg","png");

      if(in_array($file_ext,$extensions)=== false){
         $errors[]="extension not allowed, please choose a JPEG or PNG file.";
      }

      if($file_size > 2097152) {
         $errors[]='File size must be 2 MB';
      }

      if ($width > 500 || $height > 500) {
      // Cancel upload
      }

      if(empty($errors)==true)
      {
        move_uploaded_file($file_tmp,"uploads/".date('Y-m-d_H-i-s').$file_name);

         $store = "UPDATE users SET userPic='$file_name', date_time='" . $info . "' WHERE username='$username'";

        if(mysqli_query($conn, $store))
        {
        }
        else
        {
            echo "Update failed!";
        }

      }else{
         print_r($errors);
         echo"Couldn't upload picture";
      }

}}
else
{
    echo "Invalid Username";
}
?>

<?php
$getimg = mysqli_query($conn,"SELECT userPic, date_time FROM users WHERE 
username='$username'");
$rows=mysqli_fetch_array($getimg);
$img = $rows['date_time'].$rows['userPic'];
?>

 <?php  
?>

<img id="myImg" src="uploads/<?php echo $img?>" alt="<?php echo $img ?>" width="200" height="150">

Answer 1

&语法错误。删除了该内容并替换为,

发件人：

"SELECT userPic & date_time FROM users WHERE username='$username'"

to：

"SELECT userPic, date_time FROM users WHERE username='$username'"

无效变量。

发件人：

$img = $rows['userPic'] ['date_time'];

要

$img = $rows['date_time'].$rows['userPic']; // how should this be formatted?

使用了错误的$_FILES密钥。

发件人：

isset($_FILES['change'])

to：

isset($_FILES['fileToUpload'])

用于检索值的错误$_FILES密钥。

发件人：

$_FILES['image']

要

$_FILES['fileToUpload']

AND operator
的语法错误
发件人：

$store = "UPDATE users SET userPic='$file_name' AND date_time='" . $info . "' WHERE username='$username'";

要

$store = "UPDATE users SET userPic='$file_name', date_time='" . $info . "' WHERE username='$username'";

增加文件上传大小。

在PHP文件中：

ini_set('upload_max_filesize', '40M'); ini_set('post_max_size', '40M');

或PHP.ini

; Maximum allowed size for uploaded files. upload_max_filesize = 40M ; Must be greater than or equal to upload_max_filesize post_max_size = 40M

PHP个人资料图片更改已删除

1 个答案: