Question

以下代码允许我网站上的用户使用POST方法表单更新其个人资料照片和个人描述。 showprofile函数在上传后显示其图片。

然而，问题是，在他们通过单击表单上的提交上传新图片后，旧图片仍会显示在此页面上。在刷新页面之前，新图片不会显示。表格提交后，我试图立即显示新图片。

<?php // Example 21-8: profile.php
include_once 'header.php';

if (!$loggedin) die();

echo "<div class='main'><h3>Your Profile</h3>";

if (isset($_POST['text']))
{
    $text = sanitizeString($_POST['text']);
    $text = preg_replace('/\s\s+/', ' ', $text);

    if (mysql_num_rows(queryMysql("SELECT * FROM profiles
        WHERE user='$user'")))
         queryMysql("UPDATE profiles SET text='$text' where user='$user'");
    else queryMysql("INSERT INTO profiles VALUES('$user', '$text')");
}
else
{
    $result = queryMysql("SELECT * FROM profiles WHERE user='$user'");

    if (mysql_num_rows($result))
    {
        $row  = mysql_fetch_row($result);
        $text = stripslashes($row[1]);
    }
    else $text = "";
}

$text = stripslashes(preg_replace('/\s\s+/', ' ', $text));

if (isset($_FILES['image']['name']))
{
    $saveto = "$user.jpg";
    move_uploaded_file($_FILES['image']['tmp_name'], $saveto);
    $typeok = TRUE;

    switch($_FILES['image']['type'])
    {
        case "image/gif":   $src = imagecreatefromgif($saveto); break;
        case "image/jpeg":  // Both regular and progressive jpegs
        case "image/pjpeg": $src = imagecreatefromjpeg($saveto); break;
        case "image/png":   $src = imagecreatefrompng($saveto); break;
        default:            $typeok = FALSE; break;
    }

    if ($typeok)
    {
        list($w, $h) = getimagesize($saveto);

        $max = 100;
        $tw  = $w;
        $th  = $h;

        if ($w > $h && $max < $w)
        {
            $th = $max / $w * $h;
            $tw = $max;
        }
        elseif ($h > $w && $max < $h)
        {
            $tw = $max / $h * $w;
            $th = $max;
        }
        elseif ($max < $w)
        {
            $tw = $th = $max;
        }

        $tmp = imagecreatetruecolor($tw, $th);
        imagecopyresampled($tmp, $src, 0, 0, 0, 0, $tw, $th, $w, $h);
        imageconvolution($tmp, array(array(-1, -1, -1),
            array(-1, 16, -1), array(-1, -1, -1)), 8, 0);
        imagejpeg($tmp, $saveto);
        imagedestroy($tmp);
        imagedestroy($src);
    }
}

showProfile($user);

echo <<<_END
<form method='post' action='profile.php' enctype='multipart/form-data'>
<h3>Enter or edit your details and/or upload an image</h3>
<textarea name='text' cols='50' rows='3'>$text</textarea><br />
_END;
?>

Image: <input type='file' name='image' size='14' maxlength='32' />
<input type='submit' value='Save Profile' />
</form></div><br /></body></html>

showProfile函数的工作原理如下（它包含在header.php文件中）

function showProfile($user)
{
    if (file_exists("$user.jpg"))
        echo "<img src='$user.jpg' align='left' />";

    $result = queryMysql("SELECT * FROM profiles WHERE user='$user'");

    if (mysql_num_rows($result))
    {
        $row = mysql_fetch_row($result);
        echo stripslashes($row[1]) . "<br clear=left /><br />";
    }

Answer 1

这可能是因为缓存......

你应该试试这个：

echo "<img src='{$user}.jpg?".time()."' align='left' />";

表单提交后，个人资料图片不会更新

1 个答案: