使用我在'devarticles.com'和'mistonline'找到的一些例子我将下面显示的脚本放在一起,允许用户将图像文件保存到mySQL数据库,将文件保存为BLOB。
<?php
$db_host = 'hostname';
$db_user = 'username';
$db_pwd = 'password';
$database = 'databasename';
$table = 'tablename';
// use the same name as SQL table
if (!mysql_connect($db_host, $db_user, $db_pwd))
die("Can't connect to database");
if (!mysql_select_db($database))
die("Can't select database");
// This function makes usage of
// $_GET, $_POST, etc... variables
// completly safe in SQL queries
function sql_safe($s)
{
if (get_magic_quotes_gpc())
$s = stripslashes($s);
return mysql_real_escape_string($s);
}
// If user pressed submit in one of the forms
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
// cleaning title field
$title = trim(sql_safe($_POST['title']));
if ($title == '') // if title is not set
$title = '(empty title)';// use (empty title) string
{
if (isset($_FILES['photo']))
{
@list(, , $imtype, ) = getimagesize($_FILES['photo']['tmp_name']);
// Get image type.
// We use @ to omit errors
if ($imtype == 3) // cheking image type
$ext="png"; // to use it later in HTTP headers
elseif ($imtype == 2)
$ext="jpeg";
elseif ($imtype == 1)
$ext="gif";
else
$msg = 'Error: unknown file format';
if (!isset($msg)) // If there was no error
{
$data = file_get_contents($_FILES['photo']['tmp_name']);
$data = mysql_real_escape_string($data);
// Preparing data to be used in MySQL query
mysql_query("INSERT INTO {$table}
SET ext='$ext', title='$title',
data='$data'");
$msg = 'Success: image uploaded';
}
}
elseif (isset($_GET['title'])) // isset(..title) needed
$msg = 'Error: file not loaded';// to make sure we've using
// upload form, not form
// for deletion
if (isset($_POST['del'])) // If used selected some photo to delete
{ // in 'uploaded images form';
$imageid = intval($_POST['del']);
mysql_query("DELETE FROM {$table} WHERE imageid=$imageid");
$msg = 'Photo deleted';
}
if (isset($_POST['view'])) // If used selected some photo to delete
{ // in 'uploaded images form';
$imageid = intval($_POST['view']);
mysql_query("SELECT ext, data FROM {$table} WHERE imageid=$imageid");
if(mysql_num_rows($result) == 1)
{
$image = $row['myimage'];
header("Content-type: image/gif"); // or whatever
print $image;
exit;
}
}
}
}
elseif (isset($_GET['show']))
{
$imageid = intval($_GET['show']);
$result = mysql_query("SELECT ext, UNIX_TIMESTAMP(imagetime), data
FROM {$table}
WHERE imageid=$imageid LIMIT 1");
if (mysql_num_rows($result) == 0)
die('no image');
list($ext, $imagetime, $data) = mysql_fetch_row($result);
$send_304 = false;
if (php_sapi_name() == 'apache') {
// if our web server is apache
// we get check HTTP
// If-Modified-Since header
// and do not send image
// if there is a cached version
$ar = apache_request_headers();
if (isset($ar['If-Modified-Since']) && // If-Modified-Since should exists
($ar['If-Modified-Since'] != '') && // not empty
(strtotime($ar['If-Modified-Since']) >= $imagetime)) // and grater than
$send_304 = true; // imagetime
}
if ($send_304)
{
// Sending 304 response to browser
// "Browser, your cached version of image is OK
// we're not sending anything new to you"
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $ts).' GMT', true, 304);
exit(); // bye-bye
}
// outputing HTTP headers
header('Content-Length: '.strlen($data));
header("Content-type: image/{$ext}");
// outputing image
echo $data;
exit();
}
?>
<html><head>
<title>Save Photo(s) to Find</title>
</head>
<body>
<?php
if (isset($msg)) // this is special section for
// outputing message
{
?>
<p style="font-weight: bold;"><?=$msg?>
<br />
</p>
<?php
}
?>
<h1>Save Find images </h1>
<h2>Uploaded Find images:</h2>
<form action="<?=$PHP_SELF?>" method="post">
<!-- This form is used for image deletion -->
<?php
$result = mysql_query("SELECT imageid, imagetime, title FROM {$table} ORDER BY imageid DESC");
if (mysql_num_rows($result) == 0) // table is empty
echo '<ul><li>No images loaded</li></ul>';
else
{
echo '<ul>';
while(list($imageid, $imagetime, $title) = mysql_fetch_row($result))
{
// outputing list
echo "<li><input type='radio' name='del' title, value='{$imageid}'/>";
echo " <small>{$title}</small>  ";
echo "<small>{$imagetime}</small></li>";
}
echo '</ul>';
echo '<input type="submit" value="Delete selected"/>';
echo "<input type=\"button\" value=\"View Photo\" onclick=\"location.href='<?=$PHP_SELF?>?show=1'\" />";
}
?>
</form>
<h2>Upload new Find image:</h2>
<form action="<?=$PHP_SELF?>" method="POST" enctype="multipart/form-data">
<label for="title"></label>
<label for="photo"></label>
<label for="password"></label>
<table border="0" cellpadding="0" cellspacing="0" bordercolor="#111111" width="38%">
<tr>
<td bgcolor="#FF9900" height="22" colspan="2"><p style="margin-left: 10"><b><font face="Verdana" size="2" color="#FFFFFF"> Upload a File</font></b></td>
</tr>
<tr>
<td bgcolor="#FFE3BB" colspan="2"><p style="margin-left: 10; margin-right: 10"><font face="Verdana" size="2"> <br>
Please select a file from your local computer to upload to our web server
for saving in our database. This file can be of any type you like. Once you
have chosen a file, please click on the "Upload this file" button below.
<br>
</font></td>
</tr>
<tr>
<td width="34%" bgcolor="#FFE3BB"><p style="margin-left: 10"><font face="Verdana" size="2"> File Description:</font></td>
<td width="66%" bgcolor="#FFE3BB"><input type="text" name="title" id="title" size="64"/></td>
</tr>
<tr>
<td bgcolor="#FFE3BB"><span style="margin-left: 10"><font face="Verdana" size="2">File Location:</font></span></td>
<td bgcolor="#FFE3BB"><input type="file" name="photo" id="photo"/></td>
</tr>
<tr>
<td width="34%" bgcolor="#FFE3BB"><p style="margin-left: 10"><font face="Verdana" size="2"> <br>
<br>
</font></td>
<td width="66%" bgcolor="#FFE3BB"><input name="submit" type="submit" value="Upload This File"/></td>
</tr>
</table>
<p> </p>
<p> </p>
</form>
</body>
</html>
我可以保存,列出保存的文件并从数据库中删除文件,但是我遇到了一个问题,我无法弄清楚如何检索和查看图像,实际上我的“查看照片”删除了它
我认为答案在“输出列表”部分,但我尝试了多种方法尝试“查看照片”按钮来执行“查看”命令。
我只是想知道是否有人可以看看这个并让我知道我哪里出错了。
答案 0 :(得分:0)
这里是:
<?php
$db_host = 'localhost';
$db_user = '';
$db_pwd = '';
$database = '';
$table = 'images';
// use the same name as SQL table
if (!mysql_connect($db_host, $db_user, $db_pwd))
die("Can't connect to database");
if (!mysql_select_db($database))
die("Can't select database");
// This function makes usage of
// $_GET, $_POST, etc... variables
// completly safe in SQL queries
function sql_safe($s)
{
if (get_magic_quotes_gpc())
$s = stripslashes($s);
return mysql_real_escape_string($s);
}
// If user pressed submit in one of the forms
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
if (!isset($_POST["action"]))
{
// cleaning title field
$title = trim(sql_safe($_POST['title']));
if ($title == '') // if title is not set
$title = '(empty title)';// use (empty title) string
if (isset($_FILES['photo']))
{
@list(, , $imtype, ) = getimagesize($_FILES['photo']['tmp_name']);
// Get image type.
// We use @ to omit errors
if ($imtype == 3) // cheking image type
$ext="png"; // to use it later in HTTP headers
elseif ($imtype == 2)
$ext="jpeg";
elseif ($imtype == 1)
$ext="gif";
else
$msg = 'Error: unknown file format';
if (!isset($msg)) // If there was no error
{
$data = file_get_contents($_FILES['photo']['tmp_name']);
$data = mysql_real_escape_string($data);
// Preparing data to be used in MySQL query
mysql_query("INSERT INTO {$table}
SET ext='$ext', title='$title',
data='$data'");
$msg = 'Success: image uploaded';
}
}
elseif (isset($_GET['title'])) // isset(..title) needed
$msg = 'Error: file not loaded';// to make sure we've using
// upload form, not form
// for deletion
if (isset($_POST['del'])) // If used selected some photo to delete
{ // in 'uploaded images form';
$imageid = intval($_POST['del']);
mysql_query("DELETE FROM {$table} WHERE imageid=$imageid");
$msg = 'Photo deleted';
}
if (isset($_POST['view'])) // If used selected some photo to delete
{ // in 'uploaded images form';
$imageid = intval($_POST['view']);
mysql_query("SELECT ext, data FROM {$table} WHERE imageid=$imageid");
if(mysql_num_rows($result) == 1)
{
$image = $row['myimage'];
header("Content-type: image/gif"); // or whatever
print $image;
exit;
}
}
}
else
{
$imageid = intval($_POST['del']);
if ($_POST["action"] == "view")
{
$result = mysql_query("SELECT ext, UNIX_TIMESTAMP(imagetime), data
FROM {$table}
WHERE imageid=$imageid LIMIT 1");
if (mysql_num_rows($result) == 0)
die('no image');
list($ext, $imagetime, $data) = mysql_fetch_row($result);
$send_304 = false;
if (php_sapi_name() == 'apache') {
// if our web server is apache
// we get check HTTP
// If-Modified-Since header
// and do not send image
// if there is a cached version
$ar = apache_request_headers();
if (isset($ar['If-Modified-Since']) && // If-Modified-Since should exists
($ar['If-Modified-Since'] != '') && // not empty
(strtotime($ar['If-Modified-Since']) >= $imagetime)) // and grater than
$send_304 = true; // imagetime
}
if ($send_304)
{
// Sending 304 response to browser
// "Browser, your cached version of image is OK
// we're not sending anything new to you"
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $ts).' GMT', true, 304);
exit(); // bye-bye
}
// outputing HTTP headers
header('Content-Length: '.strlen($data));
header("Content-type: image/{$ext}");
// outputing image
echo $data;
exit();
}
else if ($_POST["action"] == "delete")
{
$imageid = intval($_POST['del']);
mysql_query("DELETE FROM {$table} WHERE imageid=$imageid");
$msg = 'Photo deleted';
}
}
}
?>
<html><head>
<title>Save Photo(s) to Find</title>
</head>
<body>
<?php
if (isset($msg)) // this is special section for
// outputing message
{
?>
<p style="font-weight: bold;"><?=$msg?>
<br />
</p>
<?php
}
?>
<h1>Save Find images </h1>
<h2>Uploaded Find images:</h2>
<form action="<?=$PHP_SELF?>" method="post">
<!-- This form is used for image deletion -->
<?php
$result = mysql_query("SELECT imageid, imagetime, title FROM {$table} ORDER BY imageid DESC");
if (mysql_num_rows($result) == 0) // table is empty
echo '<ul><li>No images loaded</li></ul>';
else
{
echo '<ul>';
while(list($imageid, $imagetime, $title) = mysql_fetch_row($result))
{
// outputing list
echo "<li><input type='radio' name='del' title, value='{$imageid}' />";
echo " <small>{$title}</small>  ";
echo "<small>{$imagetime}</small></li>";
}
echo '</ul>';
echo '<input type="submit" value="Delete selected" onclick="document.getElementById(\'action\').value=\'delete\'" />';
echo '<input type="submit" value="View Photo" onclick="document.getElementById(\'action\').value=\'view\'" />';
}
?>
<input type="hidden" name="action" id="action" />
</form>
<h2>Upload new Find image:</h2>
<form action="<?=$PHP_SELF?>" method="POST" enctype="multipart/form-data">
<label for="title"></label>
<label for="photo"></label>
<label for="password"></label>
<table border="0" cellpadding="0" cellspacing="0" bordercolor="#111111" width="38%">
<tr>
<td bgcolor="#FF9900" height="22" colspan="2"><p style="margin-left: 10"><b><font face="Verdana" size="2" color="#FFFFFF"> Upload a File</font></b></td>
</tr>
<tr>
<td bgcolor="#FFE3BB" colspan="2"><p style="margin-left: 10; margin-right: 10"><font face="Verdana" size="2"> <br>
Please select a file from your local computer to upload to our web server
for saving in our database. This file can be of any type you like. Once you
have chosen a file, please click on the "Upload this file" button below.
<br>
</font></td>
</tr>
<tr>
<td width="34%" bgcolor="#FFE3BB"><p style="margin-left: 10"><font face="Verdana" size="2"> File Description:</font></td>
<td width="66%" bgcolor="#FFE3BB"><input type="text" name="title" id="title" size="64"/></td>
</tr>
<tr>
<td bgcolor="#FFE3BB"><span style="margin-left: 10"><font face="Verdana" size="2">File Location:</font></span></td>
<td bgcolor="#FFE3BB"><input type="file" name="photo" id="photo"/></td>
</tr>
<tr>
<td width="34%" bgcolor="#FFE3BB"><p style="margin-left: 10"><font face="Verdana" size="2"> <br>
<br>
</font></td>
<td width="66%" bgcolor="#FFE3BB"><input name="submit" type="submit" value="Upload This File"/></td>
</tr>
</table>
<p> </p>
<p> </p>
</form>
</body>
</html>
希望它适合你!!