我正在寻求帮助。我有以下代码，可以上传图像并创建缩略图并将它们存储在适当的文件夹中......但我的问题是空间。上传的主要图像是巨大的 4320 x 3240，该网站需要很长时间才能加载......我只想要 2 张图像：主图像最大宽度 1024，缩略图最大宽度 100....
更新：现在可以调整主图像的大小并创建缩略图，但仅适用于 2500 像素宽
这是我到目前为止的代码：
<?php ob_start();
session_start();
include("../../config.php");
ini_set("memory_limit", "500M");
$folder = "../images/stock/".$_SESSION['info_id']."";
$thumbs =$folder.'/thumbs/';
if(!file_exists($folder)){
mkdir ($folder,0777);
$uploadfolder = $folder."/";
//echo $folder.'<br>';
}
else
{
//echo 'folder already created<br>';
$uploadfolder = $folder."/";
//echo $folder.'<br>';
}
if(!file_exists($thumbs)){
mkdir($thumbs,0777);
$thumbnailfolder = $thumbs ;
//echo $thumbs.'<br>';
}else{
$thumbnailfolder = $thumbs ;
//echo $thumbnailfolder.'<br>';
}
$allowedfiletypes = array("jpeg","jpg");
//$uploadfolder = $s;
$thumbnailheight = 100; //in pixels
$imagesresizeheight = 500;
$action = $_POST['action'];
if ($action == "upload") {
//$_SESSION['result'] = "Uploading image... " ;
if(empty($_FILES['uploadimage']['name'])){
$_SESSION['result'] = "<strong>Error: File not uploaded 1!</strong><br>" ;
} else {
$uploadfilename = $_FILES['uploadimage']['name'];
$fileext = strtolower(substr($uploadfilename,strrpos($uploadfilename,".")+1));
if (!in_array($fileext,$allowedfiletypes)) { $_SESSION['result'] = "<strong>Error: Invalid file extension!</strong><br>" ; }
else {
$fulluploadfilename = $uploadfolder.$uploadfilename ;
if (move_uploaded_file($_FILES['uploadimage']['tmp_name'], $fulluploadfilename)) {
$im = imagecreatefromjpeg($fulluploadfilename);
if (!$im) { $_SESSION['result'] = "<p><strong>Error: Couldn't Resize Image!</strong><br>" ; }
else {
//// Resize Image Creation //////
$imw = imagesx($im); // uploaded image width
$imh = imagesy($im); // uploaded image height
$nh = $imagesresizeheight; // thumbnail height
$nw = round(($nh / $imh) * $imw); //thumnail width
$newim = imagecreatetruecolor ($nw, $nh);
imagecopyresampled ($newim,$im, 0, 0, 0, 0, $nw, $nh, $imw, $imh) ;
$imagefilename = $uploadfolder.$uploadfilename ;
imagejpeg($newim, $imagefilename) or die($_SESSION['result'] ="<strong>Error: Couldn't save image resize!</strong><br>");
echo $imw. $imh. $nw. $imagefilename;
//// Thumbnail Creation //////
$imw = imagesx($im); // uploaded image width
$imh = imagesy($im); // uploaded image height
$nh = $thumbnailheight; // thumbnail height
$nw = round(($nh / $imh) * $imw); //thumnail width
$newim = imagecreatetruecolor ($nw, $nh);
imagecopyresampled ($newim,$im, 0, 0, 0, 0, $nw, $nh, $imw, $imh) ;
$thumbfilename = $thumbnailfolder.$uploadfilename ;
imagejpeg($newim, $thumbfilename) or die($_SESSION['result'] ="<strong>Error: Couldn't save thumnbail!</strong><br>");
//echo $thumbfilename;
//$_SESSION['result'] ='<img src="'.$thumbfilename.'"/><br>' ;
}
} else { $_SESSION['result'] = "<strong>Error: Couldn't save file($fulluploadfilename)!</strong><br>";
}
}
}
}
//unlink($fulluploadfilename);
////////////////////////////////////////////////
//connect to mysql server
$c = mysql_connect(DB_SERVER, DB_USERNAME, DB_PASSWORD, DB);
if (!$c){
$_SESSION['result'] .= mysql_error().'<br>';
return;
}
if (!mysql_select_db(DB)){
$_SESSION['result'] .= mysql_error().'<br>';
mysql_close($c);
return;
}
//5. insert settings
$sql = "INSERT INTO photo(photo_id,photo_filename) VALUES ('".$_SESSION['info_id']."','".$uploadfilename."')";
if (!mysql_query($sql,$c)){
mysql_close($c);
return;
}
mysql_close($c);
//////////////////////////////////////////////
//$ref = getenv("HTTP_REFERER");
//header("Location: ".$ref);
?>
只是
unlink($fulluploadfilename);
创建所有缩略图后。