Php 无法创建拇指，图像为黑色
我正在从单个输入上传多个图像，并动态创建所有上传图像的拇指表单，但是当我运行代码时，我只得到黑色图像，但原始图像与上传的图像相同Php 无法创建拇指，图像为黑色,php,image,thumbnails,Php,Image,Thumbnails,我正在从单个输入上传多个图像，并动态创建所有上传图像的拇指表单，但是当我运行代码时，我只得到黑色图像，但原始图像与上传的图像相同 <?php $newname = md5(rand() * time()); $file1 = isset($_FILES['files']['name'][0]) ? $_FILES['files']['name'][0] : null; $file2 = isset($_FILES['files']['name'][1]) ? $_FILES['f
<?php
$newname = md5(rand() * time());
$file1 = isset($_FILES['files']['name'][0]) ? $_FILES['files']['name'][0] : null;
$file2 = isset($_FILES['files']['name'][1]) ? $_FILES['files']['name'][1] : null;
$file3 = isset($_FILES['files']['name'][2]) ? $_FILES['files']['name'][2] : null;
$file4 = isset($_FILES['files']['name'][3]) ? $_FILES['files']['name'][3] : null;
$file5 = isset($_FILES['files']['name'][4]) ? $_FILES['files']['name'][4] : null;
if (isset($_FILES['files'])) {
$errors = array();
foreach ($_FILES['files']['tmp_name'] as $key => $tmp_name) {
$file_name = $key . $_FILES['files']['name'][$key];
$file_size = $_FILES['files']['size'][$key];
$file_tmp = $_FILES['files']['tmp_name'][$key];
$file_type = $_FILES['files']['type'][$key];
if ($file_size > 2097152000) {
$errors[] = 'File size must be less than 2 MB';
}
$desired_dir = "user_data/";
if (empty($errors) == true) {
if (is_dir($desired_dir) == false) {
mkdir("$desired_dir", 0700); // Create directory if it does not exist
}
if (is_dir("$desired_dir/" . $file_name) == false) {
move_uploaded_file($file_tmp, "$desired_dir/" . $newname . $file_name);
} else { // rename the file if another one exist
$new_dir = "$desired_dir/" . $newname . $file_name;
rename($file_tmp, $new_dir);
}
} else {
print_r($errors);
}
}
if (empty($error)) {
echo "FILE : $file1<br>";
echo "FILE : $file2<br>";
echo "FILE : $file3<br>";
echo "FILE : $file4<br>";
echo "FILE : $file5<br>";
}
}
$orig_directory = "$desired_dir"; //Full image folder
$thumb_directory = "thumb/"; //Thumbnail folder
/* Opening the thumbnail directory and looping through all the thumbs: */
$dir_handle = @opendir($orig_directory); //Open Full image dirrectory
if ($dir_handle > 1){ //Check to make sure the folder opened
$allowed_types=array('jpg','jpeg','gif','png');
$file_type=array();
$ext='';
$title='';
$i=0;
while ($file_name = @readdir($dir_handle)) {
/* Skipping the system files: */
if($file_name=='.' || $file_name == '..') continue;
$file_type = explode('.',$file_name); //This gets the file name of the images
$ext = strtolower(array_pop($file_type));
/* Using the file name (withouth the extension) as a image title: */
$title = implode('.',$file_type);
$title = htmlspecialchars($title);
/* If the file extension is allowed: */
if(in_array($ext,$allowed_types)) {
/* If you would like to inpute images into a database, do your mysql query here */
/* The code past here is the code at the start of the tutorial */
/* Outputting each image: */
$nw = 100;
$nh = 100;
$source = "$desired_dir{$file_name}";
$stype = explode(".", $source);
$stype = $stype[count($stype)-1];
$dest = "thumb/{$file_name}";
$size = getimagesize($source);
$w = $size[0];
$h = $size[1];
switch($stype) {
case 'gif':
$simg = imagecreatefromgif($source);
break;
case 'jpg':
$simg = imagecreatefromjpeg($source);
break;
case 'png':
$simg = imagecreatefrompng($source);
break;
}
$dimg = imagecreatetruecolor($nw, $nh);
$wm = $w/$nw;
$hm = $h/$nw;
$h_height = $nh/2;
$w_height = $nw/2;
if($w> $h) {
$adjusted_width = $w / $hm;
$half_width = $adjusted_width / 2;
$int_width = $w / $hm;
imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h);
} else {
imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h);
}
imagejpeg($dimg,$dest,100);
}
}
/* Closing the directory */
@closedir($dir_handle);
}
?>
我认为使用mime类型比使用扩展更好 您将执行以下操作：
function check_supported_type($type)
{
switch($type)
{
case "image/jpeg":
case "image/gif":
case "image/png":
return true;
default:
return false;
}
}
function GetMimeType($file)
{
//$type = mime_content_type($file); //deprecated
/* //file info -> normal method, but returns wrong values for ics files..
$finfo = finfo_open(FILEINFO_MIME_TYPE); // return mime type ala mimetype extension
$type = $filename.":".finfo_file($finfo, $filename);
finfo_close($finfo);
*/
$forbiddenChars = array('?', '*', ':', '|', ';', '<', '>');
if(strlen(str_replace($forbiddenChars, '', $file)) < strlen($file))
throw new \ArgumentException("Forbidden characters!");
$file = escapeshellarg($file);
ob_start();
$type = system("file --mime-type -b ".$file);
ob_clean();
return $type;
}
$wm = $w/$nw;
$hm = $h/$nw;
$h_height = $nh/2;
$w_height = $nw/2;
if($w> $h) {
$adjusted_width = $w / $hm;
$half_width = $adjusted_width / 2;
$int_width = $w / $hm;
imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h);
} else {
imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h);
}
一切都会好起来的。（如果拇指是二次的）我认为使用mime类型比使用扩展更好 您将执行以下操作：
function check_supported_type($type)
{
switch($type)
{
case "image/jpeg":
case "image/gif":
case "image/png":
return true;
default:
return false;
}
}
function GetMimeType($file)
{
//$type = mime_content_type($file); //deprecated
/* //file info -> normal method, but returns wrong values for ics files..
$finfo = finfo_open(FILEINFO_MIME_TYPE); // return mime type ala mimetype extension
$type = $filename.":".finfo_file($finfo, $filename);
finfo_close($finfo);
*/
$forbiddenChars = array('?', '*', ':', '|', ';', '<', '>');
if(strlen(str_replace($forbiddenChars, '', $file)) < strlen($file))
throw new \ArgumentException("Forbidden characters!");
$file = escapeshellarg($file);
ob_start();
$type = system("file --mime-type -b ".$file);
ob_clean();
return $type;
}
$wm = $w/$nw;
$hm = $h/$nw;
$h_height = $nh/2;
$w_height = $nw/2;
if($w> $h) {
$adjusted_width = $w / $hm;
$half_width = $adjusted_width / 2;
$int_width = $w / $hm;
imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h);
} else {
imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h);
}
一切都会好起来的。（如果拇指是二次的）这是我上传多个文件并裁剪它们的代码 它将图像上载到文件夹，然后拾取图像，对其进行裁剪，重新上载裁剪后的图像并删除原始图像 我相信你可以玩这个 这是php代码
if(isset($_POST['upload_gal']))
{
$fk_id = $_POST['fk_id'];
$errors= array();
foreach($_FILES['files']['tmp_name'] as $key => $tmp_name ){
$file_name = $key.$_FILES['files']['name'][$key];
$file_size =$_FILES['files']['size'][$key];
$file_tmp =$_FILES['files']['tmp_name'][$key];
$file_type=$_FILES['files']['type'][$key];
if($file_type=='image/jpeg'||$type=='image/gif'||$type=='image/bmp'||$type=='image/png')
{
$image_info = getimagesize($_FILES["files"]["tmp_name"][$key]);
$image_width = $image_info[0];
$image_height = $image_info[1];
$desired_dir="brand_images/";
if(empty($errors)==true){
if(is_dir($desired_dir)==false){
mkdir("$desired_dir", 0755); // Create directory if it does not exist
}
$locationing="brand_images/$file_name";
move_uploaded_file($file_tmp,$locationing);
$image = imagecreatefromstring(file_get_contents("brand_images/$file_name"));
$rand = rand(111,43943749739349343);
$filename = "brand_images/$rand-33$file_name";
if($image_width >= 840 && $image_height >= 680)
{
$thumb_width = 1200;
$thumb_height = 700;
}else{
$thumb_width = 800;
$thumb_height = 533;
}
$width = imagesx($image);
$height = imagesy($image);
$original_aspect = $width / $height;
$thumb_aspect = $thumb_width / $thumb_height;
if ( $original_aspect >= $thumb_aspect )
{
// If image is wider than thumbnail (in aspect ratio sense)
$new_height = $thumb_height;
$new_width = $width / ($height / $thumb_height);
}
else
{
// If the thumbnail is wider than the image
$new_width = $thumb_width;
$new_height = $height / ($width / $thumb_width);
}
$thumb = imagecreatetruecolor( $thumb_width, $thumb_height );
// Resize and crop
imagecopyresampled($thumb,
$image,
0 - ($new_width - $thumb_width) / 2, // Center the image horizontally
0 - ($new_height - $thumb_height) / 2, // Center the image vertically
0, 0,
$new_width, $new_height,
$width, $height);
imagejpeg($thumb, $filename, 80);
move_uploaded_file($tmp_name, $filename);
mysql_query("INSERT INTO gallery VALUES('','brand_images/$rand-33$file_name','$fk_id')");
echo"<script>
window.location = document.URL.replace(/#$/, '');
</script>";
}
if（isset（$\u POST['upload\u gal'））
{
$fk_id=$_POST['fk_id']；
$errors=array（）；
foreach（$\u FILES['FILES']['tmp\u name']作为$key=>$tmp\u name）{
$file\u name=$key.$\u FILES['FILES']['name'][$key]；
$file\u size=$\u FILES['FILES']['size'][$key]；
$file\u tmp=$\u FILES['FILES']['tmp\u name'][$key]；
$file\u type=$\u FILES['FILES']['type'][$key]；
如果（$file_type=='image/jpeg'| |$type=='image/gif'| |$type=='image/bmp'| |$type=='image/png'）
{
$image\u info=getimagesize（$\u文件[“文件”][“tmp\u名称”][$key]）；
$image\u width=$image\u info[0]；
$image\u height=$image\u info[1]；
$desired_dir=“brand_images/”；
if（空（$errors）=true）{
if（is_dir（$desired_dir）==false）{
mkdir（“$desired_dir”，0755）；//如果目录不存在，则创建目录
}
$locationing=“品牌图片/$file\u名称”；
移动上传的文件（$file\u tmp，$location）；
$image=imagecreatefromstring（文件获取内容（“品牌图像”/$file名称”）；
$rand=rand（1114394349739349343）；
$filename=“brand_images/$rand-33$file_name”；
如果（$image\u width>=840&&$image\u height>=680）
{
$thumb_width=1200；
$thumb_高度=700；
}否则{
$thumb_width=800；
$thumb_高度=533；
}
$width=imagesx（$image）；
$height=imagesy（$image）；
$original_aspect=$width/$height；
$thumb\u aspect=$thumb\u width/$thumb\u height；
如果（$original\u aspect>=$thumb\u aspect）
{
//如果图像比缩略图宽（在纵横比意义上）
$new_height=$thumb_height；
$new_width=$width/（$height/$thumb_height）；
}
其他的
{
//如果缩略图比图像宽
$new_width=$thumb_width；
$new_height=$height/（$width/$thumb_width）；
}
$thumb=ImageCreateTureColor（$thumb\u宽度，$thumb\u高度）；
//调整大小并裁剪
ImageCopy重新采样（$thumb，
$image，
0-（$new\u width-$thumb\u width）/2，//将图像水平居中
0-（$new\u height-$thumb\u height）/2，//将图像垂直居中
0, 0,
$new_width，$new_height，
$width，$height）；
imagejpeg（$thumb，$filename，80）；
移动上传的文件（$tmp\u name，$filename）；
mysql_查询（“插入库值（“”，'brand_images/$rand-33$file_name'，'fk_id'））；
回声“
window.location=document.URL.replace（/#$/，''）；
";
}
<form action="" enctype="multipart/form-data" method="POST">
<h3 class="no_margin-top">Upload a new image</h3>
<hr>
<input type="hidden" name="fk_id" value="<?php echo $brand->brand_id ?>">
<input name="upload_gal" type="submit" class="btn btn-sm pull-right btn-success" value="Upload">
Upload image: <input type="file" name="files[]" multiple>
<p class="text-danger top-buffer">If image is larger than 800x533, the image would be cropped</p>
</form>
上载新图像
这是我上传多个文件并裁剪它们的代码
它将图像上载到文件夹，然后拾取图像，对其进行裁剪，重新上载裁剪后的图像并删除原始图像
我相信你可以玩这个
这是php代码
if(isset($_POST['upload_gal']))
{
$fk_id = $_POST['fk_id'];
$errors= array();
foreach($_FILES['files']['tmp_name'] as $key => $tmp_name ){
$file_name = $key.$_FILES['files']['name'][$key];
$file_size =$_FILES['files']['size'][$key];
$file_tmp =$_FILES['files']['tmp_name'][$key];
$file_type=$_FILES['files']['type'][$key];
if($file_type=='image/jpeg'||$type=='image/gif'||$type=='image/bmp'||$type=='image/png')
{
$image_info = getimagesize($_FILES["files"]["tmp_name"][$key]);
$image_width = $image_info[0];
$image_height = $image_info[1];
$desired_dir="brand_images/";
if(empty($errors)==true){
if(is_dir($desired_dir)==false){
mkdir("$desired_dir", 0755); // Create directory if it does not exist
}
$locationing="brand_images/$file_name";
move_uploaded_file($file_tmp,$locationing);
$image = imagecreatefromstring(file_get_contents("brand_images/$file_name"));
$rand = rand(111,43943749739349343);
$filename = "brand_images/$rand-33$file_name";
if($image_width >= 840 && $image_height >= 680)
{
$thumb_width = 1200;
$thumb_height = 700;
}else{
$thumb_width = 800;
$thumb_height = 533;
}
$width = imagesx($image);
$height = imagesy($image);
$original_aspect = $width / $height;
$thumb_aspect = $thumb_width / $thumb_height;
if ( $original_aspect >= $thumb_aspect )
{
// If image is wider than thumbnail (in aspect ratio sense)
$new_height = $thumb_height;
$new_width = $width / ($height / $thumb_height);
}
else
{
// If the thumbnail is wider than the image
$new_width = $thumb_width;
$new_height = $height / ($width / $thumb_width);
}
$thumb = imagecreatetruecolor( $thumb_width, $thumb_height );
// Resize and crop
imagecopyresampled($thumb,
$image,
0 - ($new_width - $thumb_width) / 2, // Center the image horizontally
0 - ($new_height - $thumb_height) / 2, // Center the image vertically
0, 0,
$new_width, $new_height,
$width, $height);
imagejpeg($thumb, $filename, 80);
move_uploaded_file($tmp_name, $filename);
mysql_query("INSERT INTO gallery VALUES('','brand_images/$rand-33$file_name','$fk_id')");
echo"<script>
window.location = document.URL.replace(/#$/, '');
</script>";
}
if（isset（$\u POST['upload\u gal']））
{
$fk_id=$_POST['fk_id']；
$errors=array（）；
foreach（$\u FILES['FILES']['tmp\u name']作为$key=>$tmp\u name）{
$file\u name=$key.$\u FILES['FILES']['name'][$key]；
$file\u size=$\u FILES['FILES']['size'][$key]；
$file\u tmp=$\u FILES['FILES']['tmp\u name'][$key]；
$file\u type=$\u FILES['FILES']['type'][$key]；
如果（$file_type=='image/jpeg'| |$type=='image/gif'| |$type=='image/bmp'| |$type=='image/png'）
{
$image\u info=getimagesize（$\u文件[“文件”][“tmp\u名称”][$key]）；
$image\u width=$image\u info[0]；
$image\u height=$image\u info[1]；
$desired_dir=“brand_images/”；
if（空（$errors）=true）{
if（is_dir（$desired_dir）==false）{
mkdir（“$desired_dir”，0755）；//如果目录不存在，则创建目录
}
$locationing=“品牌图片/$file\u名称”；
移动上传的文件（$file\u tmp，$location）；
$image=imagecreatefromstring（文件获取内容（“品牌图像”/$file名称”）；
$rand=rand（1114394349739349343）；
$filename=“brand_images/$rand-33$file_name”；
如果（$image\u width>=840&&$image\u height>=680）
{
$thumb_width=1200；
$thumb_高度=700；
}否则{
$thumb_width=800；
$thumb_高度=533；
}
$width=imagesx（$image）；
$height=imagesy（$image）；
$original_aspect=$width/$height；
$thumb\u aspect=$thumb\u width/$thumb\u height；
如果（$original\u aspect>=$thumb\u aspect）
{
//如果图像比缩略图宽（在纵横比意义上）
$new_height=$thumb_height；
$new_width=$width/（$height
imagecopyresampled($dimg, $simg, -$int_width, 0, 0, 0, $adjusted_width, $nh, $w, $h);
function resizePreservingAspectRatio($img, $targetWidth, $targetHeight)
{
$srcWidth = imagesx($img);
$srcHeight = imagesy($img);
// Determine new width / height preserving aspect ratio
$srcRatio = $srcWidth / $srcHeight;
$targetRatio = $targetWidth / $targetHeight;
if (($srcWidth <= $targetWidth) && ($srcHeight <= $targetHeight))
{
$imgTargetWidth = $srcWidth;
$imgTargetHeight = $srcHeight;
}
else if ($targetRatio > $srcRatio)
{
$imgTargetWidth = (int) ($targetHeight * $srcRatio);
$imgTargetHeight = $targetHeight;
}
else
{
$imgTargetWidth = $targetWidth;
$imgTargetHeight = (int) ($targetWidth / $srcRatio);
}
// Creating new image with desired size
$targetImg = imagecreatetruecolor($targetWidth, $targetHeight);
// Add transparency if your reduced image does not fit with the new size
$targetTransparent = imagecolorallocate($targetImg, 255, 0, 255);
imagefill($targetImg, 0, 0, $targetTransparent);
imagecolortransparent($targetImg, $targetTransparent);
// Copies image, centered to the new one (if it does not fit to it)
imagecopyresampled(
$targetImg, $img, ($targetWidth - $imgTargetWidth) / 2, // centered
($targetHeight - $imgTargetHeight) / 2, // centered
0, 0, $imgTargetWidth, $imgTargetHeight, $srcWidth, $srcHeight
);
return $targetImg;
}
<?php
$newname = md5(rand() * time());
$file1 = isset($_FILES['files']['name'][0]) ? $_FILES['files']['name'][0] : null;
$file2 = isset($_FILES['files']['name'][1]) ? $_FILES['files']['name'][1] : null;
$file3 = isset($_FILES['files']['name'][2]) ? $_FILES['files']['name'][2] : null;
$file4 = isset($_FILES['files']['name'][3]) ? $_FILES['files']['name'][3] : null;
$file5 = isset($_FILES['files']['name'][4]) ? $_FILES['files']['name'][4] : null;
if (isset($_FILES['files']))
{
$errors = array ();
foreach ($_FILES['files']['tmp_name'] as $key => $tmp_name)
{
$file_name = $key . $_FILES['files']['name'][$key];
$file_size = $_FILES['files']['size'][$key];
$file_tmp = $_FILES['files']['tmp_name'][$key];
$file_type = $_FILES['files']['type'][$key];
if ($file_size > 2097152000)
{
$errors[] = 'File size must be less than 2 MB';
}
$desired_dir = "user_data/";
if (empty($errors) == true)
{
if (is_dir($desired_dir) == false)
{
mkdir("$desired_dir", 0700); // Create directory if it does not exist
}
if (is_dir("$desired_dir/" . $file_name) == false)
{
move_uploaded_file($file_tmp, "$desired_dir/" . $newname . $file_name);
}
else
{ // rename the file if another one exist
$new_dir = "$desired_dir/" . $newname . $file_name;
rename($file_tmp, $new_dir);
}
}
else
{
print_r($errors);
}
}
if (empty($error))
{
echo "FILE : $file1<br>";
echo "FILE : $file2<br>";
echo "FILE : $file3<br>";
echo "FILE : $file4<br>";
echo "FILE : $file5<br>";
}
$orig_directory = "$desired_dir"; //Full image folder
$thumb_directory = "thumb/"; //Thumbnail folder
/* Opening the thumbnail directory and looping through all the thumbs: */
$dir_handle = @opendir($orig_directory); //Open Full image dirrectory
if ($dir_handle > 1)
{ //Check to make sure the folder opened
$allowed_types = array ('jpg', 'jpeg', 'gif', 'png');
$file_type = array ();
$ext = '';
$title = '';
$i = 0;
while ($file_name = @readdir($dir_handle))
{
/* Skipping the system files: */
if ($file_name == '.' || $file_name == '..')
continue;
$file_type = explode('.', $file_name); //This gets the file name of the images
$ext = strtolower(array_pop($file_type));
/* Using the file name (withouth the extension) as a image title: */
$title = implode('.', $file_type);
$title = htmlspecialchars($title);
/* If the file extension is allowed: */
if (in_array($ext, $allowed_types))
{
/* If you would like to inpute images into a database, do your mysql query here */
/* The code past here is the code at the start of the tutorial */
/* Outputting each image: */
$nw = 100;
$nh = 100;
$source = "$desired_dir{$file_name}";
$stype = explode(".", $source);
$stype = $stype[count($stype) - 1];
$dest = "thumb/{$file_name}";
$size = getimagesize($source);
$w = $size[0];
$h = $size[1];
switch ($stype)
{
case 'gif':
$simg = imagecreatefromgif($source);
break;
case 'jpg':
$simg = imagecreatefromjpeg($source);
break;
case 'png':
$simg = imagecreatefrompng($source);
break;
}
$dimg = resizePreservingAspectRatio($simg, $nw, $nh);
imagepng($dimg, $dest);
}
}
/* Closing the directory */
@closedir($dir_handle);
}
}
function resizePreservingAspectRatio($img, $targetWidth, $targetHeight)
{
$srcWidth = imagesx($img);
$srcHeight = imagesy($img);
// Determine new width / height preserving aspect ratio
$srcRatio = $srcWidth / $srcHeight;
$targetRatio = $targetWidth / $targetHeight;
if (($srcWidth <= $targetWidth) && ($srcHeight <= $targetHeight))
{
$imgTargetWidth = $srcWidth;
$imgTargetHeight = $srcHeight;
}
else if ($targetRatio > $srcRatio)
{
$imgTargetWidth = (int) ($targetHeight * $srcRatio);
$imgTargetHeight = $targetHeight;
}
else
{
$imgTargetWidth = $targetWidth;
$imgTargetHeight = (int) ($targetWidth / $srcRatio);
}
// Creating new image with desired size
$targetImg = imagecreatetruecolor($targetWidth, $targetHeight);
// Add transparency if your reduced image does not fit with the new size
$targetTransparent = imagecolorallocate($targetImg, 255, 0, 255);
imagefill($targetImg, 0, 0, $targetTransparent);
imagecolortransparent($targetImg, $targetTransparent);
// Copies image, centered to the new one (if it does not fit to it)
imagecopyresampled(
$targetImg, $img, ($targetWidth - $imgTargetWidth) / 2, // centered
($targetHeight - $imgTargetHeight) / 2, // centered
0, 0, $imgTargetWidth, $imgTargetHeight, $srcWidth, $srcHeight
);
return $targetImg;
}
?>
<form method="post" enctype="multipart/form-data">
<input name="files[]" type="file"/><br/>
<input name="files[]" type="file"/><br/>
<input name="files[]" type="file"/><br/>
<input name="files[]" type="file"/><br/>
<input name="files[]" type="file"/><br/>
<input type="submit"/>
</form>
switch(strtolower($stype)) {
case 'gif':
$simg = imagecreatefromgif($source);
break;
case 'jpg':
case 'jpeg':
$simg = imagecreatefromjpeg($source);
break;
case 'png':
$simg = imagecreatefrompng($source);
break;
default:
throw new \Exception('invalid image type :'.$stype);
break;
}