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php SWFUpload 怎么创建缩略图并且保存到指定文件夹里面
www.jz123.cn 2013-04-01 来源: 站长家园 责任编辑(袁袁) 我要投递新闻
upload.php
<?php
/*
* swfupload图片上传
*/
if (isset($_POST["PHPSESSID"])) {
session_id($_POST["PHPSESSID"]);
}
session_start();
ini_set("html_errors", "0");
if (!isset($_FILES["Filedata"]) || !is_uploaded_file($_FILES["Filedata"]["tmp_name"]) ||$_FILES["Filedata"]["error"] != 0) {
echo "错误:无效的上传!";
exit(0);
}
// Get the image and create a thumbnail
$file_types=explode(".",$_FILES["Filedata"]["name"]);
$file_type=$file_types[count($file_types)-1];
if(strtolower($file_type)=='gif' )
{
$img = imagecreatefromgif($_FILES["Filedata"]["tmp_name"]);
}
else if(strtolower($file_type)=='png')
{
$img = imagecreatefrompng($_FILES["Filedata"]["tmp_name"]);
}
else if(strtolower($file_type)=='bmp')
{
$img = imagecreatefromwbmp($_FILES["Filedata"]["tmp_name"]);
}
else
{
$img = imagecreatefromjpeg($_FILES["Filedata"]["tmp_name"]);
}
if (!$img) {
echo "错误:无法创建图像 ". $_FILES["Filedata"]["tmp_name"];
exit(0);
}
$width = imageSX($img);
$height = imageSY($img);
if (!$width || !$height) {
echo "错误：无效的高或高";
exit(0);
}
// Build the thumbnail
$target_width = 100;
$target_height = 100;
$target_ratio = $target_width / $target_height;
$img_ratio = $width / $height;
if ($target_ratio > $img_ratio) {
$new_height = $target_height;
$new_width = $img_ratio * $target_height;
} else {
$new_height = $target_width / $img_ratio;
$new_width = $target_width;
}
if ($new_height > $target_height) {
$new_height = $target_height;
}
if ($new_width > $target_width) {
$new_height = $target_width;
}
$new_img = ImageCreateTrueColor(100, 100);
if (!@imagefilledrectangle($new_img, 0, 0, $target_width-1, $target_height-1, 0)) { // Fill the image black
echo "错误：不能填充新图片";
exit(0);
}
if (!@imagecopyresampled($new_img, $img, ($target_width-$new_width)/2, ($target_height-$new_height)/2, 0,0, $new_width, $new_height, $width, $height)) {
echo "错误：不能调整大小的图像";
exit(0);
}
if (!isset($_SESSION["file_info"])) {
$_SESSION["file_info"] = array();
}
ob_start();
imagejpeg($new_img);
$imagevariable = ob_get_contents();
ob_end_clean();
$file_id = md5($_FILES["Filedata"]["tmp_name"] + rand()*100000);
$_SESSION["file_info"][$file_id] = $imagevariable;
echo "FILEID:" . $file_id; // Return the file id to the script
include("upimg.class.php");
if(!empty($_FILES["Filedata"]) and count(explode(",",$_SESSION["upload_tem"]))<5)
{
$folder="upload/images/tem/".date("Y-m-d");
$up = new upimg("$folder","$folder"); //可以写成：$up = new upimg();
$up->autoThumb = TRUE; //可省略
$up->srcDel=TRUE;
$up->thumbWidth = 550; //可省略
$up->thumbHeight = 400; //可省略
$up->maxsize=2014; //上传文件大小单位是kb
$result= $up->upload('Filedata'); // HTML中<input />的name属性值
$_SESSION["upload_tem"]=$_SESSION["upload_tem"].",".$up->thumbPath;
$_SESSION["upload_tem"]=trim($_SESSION["upload_tem"],",");
}
?>
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