PHP imagecopyresample给出的资源错误，仅为gif图像 - PHP imagecopyresampled giving resource error only for gif images

当我将imagecreatetruecolor生成的黑色图像背景传递给imagecopyresampled时，它给出了一个错误，因为imagecopyresampled中的参数1预计是资源，但给出了一个整数。

这只发生在gif图像上。此外，我使用imagecolortransparent的gif，使动画的不显示为静态与黑色背景，但它也传递给imagecopyresampled给出相同的错误。

without imagecolortransparent:

function resizeImageGIF($image,$width,$height,$scale) {
    $newImageWidth = ceil($width * $scale);
    $newImageHeight = ceil($height * $scale);
    $newImage = imagecreatetruecolor($newImageWidth,$newImageHeight);
    $source = imagecreatefromgif($image);
    imagecopyresampled($newImage,$source,0,0,0,0,$newImageWidth,$newImageHeight,$width,$height);
    imagegif($newImage,$image);
    chmod($image, 0777);
    return $image;
}

上面的代码生成了一个黑色背景的静态gif，并给出了与参数1

相同的整数PHP错误。

With imagecolortransparent:

function resizeImageGIF($image,$width,$height,$scale) {
    $newImageWidth = ceil($width * $scale);
    $newImageHeight = ceil($height * $scale);
    $newImage = imagecreatetruecolor($newImageWidth,$newImageHeight);
    $black=imagecolorallocate($newImage,0,0,0);
    $newImageTransparent = imagecolortransparent($newImage,$black);
    $source = imagecreatefromgif($image);
    imagecopyresampled($newImageTransparent,$source,0,0,0,0,$newImageWidth,$newImageHeight,$width,$height);
    imagegif($newImageTransparent,$image);
    chmod($image, 0777);
    return $image;
}

这个生成一个动画gif，但仍然有上面的错误，而且不缩放图像，结果图像弹出固定宽度的容器

试试这个脚本和这个脚本为我工作

$size = 200; // the thumbnail height
$filedir = 'uploads/'; // the directory for the original image
$thumbdir = 'uploads/'; // the directory for the thumbnail image
$prefix = 'small0_'; // the prefix to be added to the original name
$maxfile = '2000000';
$mode = '0666';
$rnd_1 = rand(11111,99999); 
$userfile_name= $rnd_1.'_'.$_FILES['image']["name"];
$userfile_tmp = $_FILES['image']['tmp_name'];
$userfile_size = $_FILES['image']['size'];
$userfile_type = $_FILES['image']['type'];
if (isset($_FILES['image']['name'])) 
{
$prod_img = $filedir.$userfile_name;
$prod_img_thumb = $thumbdir.$prefix.$userfile_name;
move_uploaded_file($userfile_tmp, $prod_img);
chmod ($prod_img, octdec($mode));
$sizes = getimagesize($prod_img);
$aspect_ratio = $sizes[1]/$sizes[0]; 
if ($sizes[1] <= $size)
{
$new_width = '500';
$new_height = '500';
}else{
$new_width = '500';
$new_height = '500';
}
$destimg=ImageCreateTrueColor($new_width,$new_height)
or die('Problem In Creating image');
$srcimg=ImageCreateFromJPEG($prod_img)
or $srcimg=ImageCreateFromPNG($prod_img)
or $srcimg=ImageCreateFromGIF($prod_img)
or die('Problem In opening Source Image0');
if(function_exists('imagecopyresampled'))
{
imagecopyresampled($destimg,$srcimg,0,0,0,0,$new_width,$new_height,ImageSX($srcimg),ImageSY($srcimg))
or die('Problem In resizing');
}else{
Imagecopyresized($destimg,$srcimg,0,0,0,0,$new_width,$new_height,ImageSX($srcimg),ImageSY($srcimg))
or die('Problem In resizing');
}
ImageJPEG($destimg,$prod_img_thumb,90)
or die('Problem In saving');
}
imagesavealpha($prod_img_thumb, true);
//setting completely transparent color
$transparent = imagecolorallocatealpha($prod_img_thumb, 0, 0, 0, 127);
//filling created image with transparent color
imagefill($prod_img_thumb, 0, 0, $transparent);
imagepng($prod_img_thumb);
}