我正在建立一个网站，向夜间狂欢者展示夜总会场所和大城市发生的事件。我正在尝试构建一个后端页面，管理员可以在其中添加俱乐部和输入信息，例如机构名称，位置，相对定价等，当然还有俱乐部的一些图像。
每个俱乐部必须至少有一张图像，即主图像。可以有另外5个，但这些是可选的，即。数据库字段可以为null。
我的表格看起来像这样：
Establishment Main Photo
TextField: name = "establishment_image"
Establishment Photo 1
TextField: name = "establishment_image"
Establishment Photo 2
TextField: name = "establishment_image"
Establishment Photo 3
TextField: name = "establishment_image"
Establishment Photo 4
TextField: name = "establishment_image"
Establishment Photo 5
TextField: name = "establishment_image"
它有点像雅虎邮件附件文件表格。如您所见，文本字段现在具有相同的文本字段名称。
我需要知道我需要在提交表单上进行哪些更改才能：例如;
放一张主图片并将其他文字字段留空， 放一张主图片，图片1和2，并将其他文本字段留空， 放一张主图片，图片1,2和3，并留下其他文本字段等等。
我的establishment_submit.php如下所示：
<?php require_once('../Connections/connections.php'); ?>
<?php //maintain the session
if (!isset($_SESSION))
{
session_start();
}
?>
<?php
//retrieve data from Query String
$establishment_name= $_POST['establishment_name'];
$short_description= $_POST['short_description'];
$long_description= $_POST['long_description'];
$location= $_POST['location'];
$url_link= $_POST['url_link'];
$establishment_address= $_POST['establishment_address'];
$establishment_pricing= $_POST['establishment_pricing'];
$establishment_telephone= $_POST['establishment_telephone'];
$establishment_contact= $_POST['establishment_contact'];
$establishment_email= $_POST['establishment_email'];
$establishment_image = $_FILES['establishment_image']['name'];
//escape User Input to help prevent SQL Injection
$establishment_name= mysql_real_escape_string($establishment_name);
$short_description= mysql_real_escape_string($short_description);
$long_description = mysql_real_escape_string($long_description);
$location= mysql_real_escape_string($location);
$url_link= mysql_real_escape_string($url_link);
$establishment_address= mysql_real_escape_string($establishment_address);
$establishment_pricing= mysql_real_escape_string($establishment_pricing);
$establishment_telephone= mysql_real_escape_string($establishment_telephone);
$establishment_contact= mysql_real_escape_string($establishment_contact);
$establishment_email= mysql_real_escape_string($establishment_email);
$establishment_image= mysql_real_escape_string($establishment_image);
//redirect when successful
$establishmentAddSuccess = "establishment_add_success.php";
?>
<?php
//define a maximum size for the uploaded images
define ("MAX_SIZE","10000");
// note that these dimensions are considered the maximum and are not fixed
// because we have to keep the image ratio intact
//define a maximum size for the uploaded images
define ("LARGE_WIDTH","500");
define ("LARGE_HEIGHT","390");
define ("WIDTH","100"); //set here the width you want your thumbnail to be
define ("HEIGHT","100"); //set here the height you want your thumbnail to be.
// this is the function that will create the appropriately sized images from the upload
// the resize will be done considering the width and height defined, but without deforming the image
function make_largeimage($img_name,$filename,$new_large_w,$new_large_h)
{
//get image extension.
$ext=getExtension($img_name);
//creates the new image using the appropriate function from gd library
if(!strcmp("jpg",$ext) || !strcmp("jpeg",$ext))
$src_img=imagecreatefromjpeg($img_name);
if(!strcmp("png",$ext))
$src_img=imagecreatefrompng($img_name);
if(!strcmp("gif",$ext))
$src_img=imagecreatefromgif($img_name);
//gets the dimensions of the image
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
// next we will calculate the new dimensions for the large image
// the next steps will be taken:
// 1. calculate the ratio by dividing the old dimensions with the new ones
// 2. if the ratio for the width is higher, the width will remain the one define in WIDTH variable
// and the height will be calculated so the image ratio will not change
// 3. otherwise we will use the height ratio for the image
// as a result, only one of the dimensions will be from the fixed ones
$ratio1_large=$old_x/$new_large_w;
$ratio2_large=$old_y/$new_large_h;
if($ratio1_large>$ratio2_large)
{
$large_w=$new_large_w;
$large_h=$old_y/$ratio1_large;
}else
{
$large_h=$new_large_h;
$large_w=$old_x/$ratio2_large;
}
// we create a new image with the new dimensions
$dst_large_img=ImageCreateTrueColor($large_w,$large_h);
// resize the big image to the newly created one
imagecopyresampled($dst_large_img,$src_img,0,0,0,0,$large_w,$large_h,$old_x,$old_y);
// output the created image to the file. Now we will have the image into the file named by $filename
if(!strcmp("png",$ext))
imagepng($dst_large_img,$filename);
else
imagejpeg($dst_large_img,$filename);
if (!strcmp("gif",$ext))
imagegif($$dst_large_img,$filename);
//destroys source and destination images.
imagedestroy($dst_large_img);
imagedestroy($src_img);
}
function make_thumb($img_name,$filename,$new_w,$new_h)
{
//get image extension.
$ext=getExtension($img_name);
//creates the new image using the appropriate function from gd library
if(!strcmp("jpg",$ext) || !strcmp("jpeg",$ext))
$src_img=imagecreatefromjpeg($img_name);
if(!strcmp("png",$ext))
$src_img=imagecreatefrompng($img_name);
if(!strcmp("gif",$ext))
$src_img=imagecreatefromgif($img_name);
//gets the dimmensions of the image
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
// next we will calculate the new dimensions for the thumbnail image
// the next steps will be taken:
// 1. calculate the ratio by dividing the old dimensions with the new ones
// 2. if the ratio for the width is higher, the width will remain the one define in WIDTH variable
// and the height will be calculated so the image ratio will not change
// 3. otherwise we will use the height ratio for the image
// as a result, only one of the dimensions will be from the fixed ones
$ratio1=$old_x/$new_w;
$ratio2=$old_y/$new_h;
if($ratio1>$ratio2)
{
$thumb_w=$new_w;
$thumb_h=$old_y/$ratio1;
}else
{
$thumb_h=$new_h;
$thumb_w=$old_x/$ratio2;
}
// we create a new image with the new dimensions
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
// resize the big image to the newly created one
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
// output the created image to the file. Now we will have the thumbnail into the file named by $filename
if(!strcmp("png",$ext))
imagepng($dst_img,$filename);
else
imagejpeg($dst_img,$filename);
if (!strcmp("gif",$ext))
imagegif($dst_img,$filename);
//destroys source and destination images.
imagedestroy($dst_img);
imagedestroy($src_img);
}
// This function reads the extension of the file.
// It is used to determine if the file is an image by checking the extension.
function getExtension($str)
{
$i = strrpos($str,".");
if (!$i) { return ""; }
$l = strlen($str) - $i;
$ext = substr($str,$i+1,$l);
return $ext;
}
// This variable is used as a flag. The value is initialized with 0 (meaning no error found)
//and it will be changed to 1 if an errro occures. If the error occures the file will not be uploaded.
$errors=0;
// if it is not empty
for($i=0;$i<count($_FILES['establishment_image']["name"]);$i++)
{
// get the original name of the file from the clients machine
$filenames = stripslashes($_FILES['establishment_image']['name'][$i]);
// get the extension of the file in a lower case format
$extensions = getExtension($filenames);
$extensions = strtolower($extensions);
// if it is not a known extension, we will suppose it is an error, print an error message
//and will not upload the file, otherwise we continue
if (($extensions != "jpg") && ($extensions != "jpeg") && ($extensions != "png") && ($extensions != "gif"))
{
$warning = ("File extension of an image(s) not allowed");
header("location:establishment_add.php?warning=$warning");
$errors=1;
exit();
}
else
{
// get the size of the image in bytes
// $_FILES[\'image\'][\'tmp_name\'] is the temporary filename of the file in which the uploaded file was stored on the server
$size=getimagesize($_FILES['establishment_image']['tmp_name'][$i]);
$sizekb=filesize($_FILES['establishment_image']['tmp_name'][$i]);
//compare the size with the maxim size we defined and print error if bigger
if ($sizekb > MAX_SIZE*1024)
{
$warning = ("Images have exceeded the size limit of 10MB");
header("location:establishment_add.php?warning=$warning");
$errors=1;
exit();
}
$rand= rand(0, 100000);
//we will give an unique name, for example a random number
$image_name=$rand.'.'.$extension;
//the new name will be containing the full path where the image will be stored (images folder)
$consname="C:/wamp/www/NNL/Administrator/Establishment_Images/".$image_name; //change the image/ section to where you would like the original image to be stored
$consname2="C:/wamp/www/NNL/Administrator/Establishment_Images/Thumbs/".$image_name;
//change the image/thumb to where you would like to store the new created thumbnail of the image
$copied = copy($_FILES['establishment_image']['tmp_name'][$i], $consname);
$copied = copy($_FILES['establishment_image']['tmp_name'][$i], $consname2);
//localhost calling of images
$img_large="../Establishment_Images/".$image_name; //change the image/ section to where you would like the original image to be stored
$img_thumb="../Establishment_Images/Thumbs/".$image_name;
//we verify if the image has been uploaded, and print error instead
if (!$copied) {
$warning = ("Unable to upload image file");
header("location:establishment_add.php?warning=$warning");
$errors=1;
exit();
}else{
// the new large image will be placed in Images/ folder
$imagelarge_name=$consname ;
// call the function that will create the thumbnail. The function will get as parameters
// the image name, the thumbnail name and the width and height desired for the thumbnail
$imagelarge=make_largeimage($consname,$imagelarge_name,LARGE_WIDTH,LARGE_HEIGHT);
// the new thumbnail image will be placed in Images/Thumbs/ folder
$thumb_name=$consname2 ;
// call the function that will create the thumbnail. The function will get as parameters
// the image name, the thumbnail name and the width and height desired for the thumbnail
$thumb=make_thumb($consname,$thumb_name,WIDTH,HEIGHT);
}
}
}
?>
<?php
//If no errors registered, redirect page
if(isset($_POST['Submit']) && !$errors)
{
//insert into database
$query2 = "INSERT INTO establishment(establishment_name,
establishment_short_description,
establishment_long_description,
establishment_address,
establishment_telephone,
establishment_contact,
establishment_email,
location_id,
establishment_pricing,
establishment_url_link,
establishment_mainphoto_url,
establishment_thumb_url)
VALUES
('$establishment_name',
'$short_description',
'$long_description',
'$establishment_address',
'$establishment_telephone',
'$establishment_contact',
'$establishment_email',
'$location',
'$establishment_pricing',
'$url_link',
'$img_large[0]',
'$img_thumb[0]')";
//Execute query
$qry_result2 = mysql_query($query2) or die(mysql_error());
header("Location: " . $establishmentAddSuccess);
}
else
{
$establishment_msg = ("Unable to add establishment");
header("location:establishment_add.php?establishment_msg=$establishment_msg");
exit();
}
?>
这适用于单张图片上传，但现在不起作用。我知道我需要从这条线做出改变;
for($i=0;$i<count($_FILES['establishment_image']["name"]);$i++)
{
如何使此表格能够上传多张图片。我将不胜感激。
答案 0 :(得分：2)
您可以像使用常规表单字段一样使用PHP的数组表示法：
Pic 1: <input type="file" name="establishment_image[]" />
Pic 2: <input type="file" name="establishment_image[]" />
然而，PHP中的文件处理内容会处理它与服务器端的预期不同：
$_FILES = array(
'establishment_image' => array(
'name' => array(
0 => 'name of Pic 1 file',
1 => 'name of Pic 2 file'
),
'error' => array(
0 => error code for pic1 upload,
1 => error code for pic2 upload
etc...
);
foreach(array_keys($_FILES['establishment_image']['name']) as $idx) {
....
}
另一个选项是为每个文件输入一个唯一的名称并使用该服务器端。如果你在每个中硬编码一个数字“子键”：
<input type="file" name="establishment_image_1" />
<input type="file" name="establishment_image_2" />
然后你可以简单地做
for ($i = 1; $i <= 5; $i++) {
echo "Name of file is ", $_FILES["establishment_image_$i"]['name'];
...
}
答案 1 :(得分：0)
当您考虑到imagick的怪癖，上传页面的UI模式，权限等时，图片上传页面会造成很多脑损伤。在内部管理员正在执行此页面的情况下，我的快捷方式是Gallery 。
然后管理员使用图库来上传，调整大小，裁剪等等。本质上，基础知识加上我的客户可能要求的“额外”，但我可能无法证明从头开始充电的理由。在用户端，我从MySQL数据库中查询了库，并以任何方式进行安排，通常是通过我操作过的华而不实的JQuery前端。但是，它可能是任何东西......我甚至可以使用画廊库存前端。
Simiplicity方面，用户不易理解。我可以在不到2小时的时间内完成并运行。由于图像是静态存储在文件系统中的，因此不会有额外的负载超出预期。
如果您选择单独行动，肯定有多种方法可以解决这一挑战。我建议您查看这篇热门帖子：How can I upload files asynchronously?