Question

我有一个允许Jpegs和PNG的上传功能。上传图像后，将调用一个php文件来处理裁剪功能以裁剪上传的图像。

裁剪图像后，它将再次以新名称保存到服务器。在当前设置中，只能将jpeg写入服务器。其他任何东西都会画出黑色图像。我想知道如何编写此代码，以便裁剪也允许PNG的

处理裁剪的代码：

$imageLocation = $_SESSION['image_location'];
$newNameOverwrite = $_SESSION['new_name'];

if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
$jpeg_quality = 100;

$src = $imageLocation;
list($width, $height, $type, $attr) = getimagesize($src);
$targ_w = $width;
$targ_h = $height;
$img_r = imagecreatefromjpeg($src);
$dst_r = imagecreatetruecolor($_POST[('w')], $_POST[('h')]);
$uploadLocation = 'uploads/';
$name = $uploadLocation.'resized_'.$newNameOverwrite;

imagecopy(
$dst_r, $img_r,
0, 0, $_POST['x'], $_POST['y'],
$_POST['w'], $_POST['h']
);

imagejpeg($dst_r,$name,100); 

$imageCropped = $name;
$_SESSION['image_cropped'] = $imageCropped;

//Thumbnail generate
include('SimpleImage.php');
$imageThumbnail = new SimpleImage();
$imageThumbnail->load($name);
$imageThumbnail->resizeToWidth(200);
$imageThumbnail->save($uploadLocation.'resizedThumbnail_'.$newNameOverwrite);

$imageThumbnailCropped = ($uploadLocation.'resizedThumbnail_'.$newNameOverwrite);

$imageThumbnailCroppedSession = $imageThumbnailCropped;
$_SESSION['image_cropped_thumbnail'] = $imageThumbnailCroppedSession;
}

更新的代码：

$imageType = $_SESSION['image_type'];

if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
$jpeg_quality = 100;

$src = $imageLocation;
list($width, $height, $type, $attr) = getimagesize($src);
$targ_w = $width;
$targ_h = $height;
    if ($imageType == '.jpg' || $imageType == '.jpeg'){
        $img_r = imagecreatefromjpeg($src);
    }
    if ($imageType == '.png'){
        $img_r = imagecreatefrompng($src);
    }       

$dst_r = imagecreatetruecolor($_POST[('w')], $_POST[('h')]);
$uploadLocation = 'uploads/';
$name = $uploadLocation.'resized_'.$newNameOverwrite; 

imagecopy(
$dst_r, $img_r,
0, 0, $_POST['x'], $_POST['y'],
$_POST['w'], $_POST['h']
);
var_dump($imageType);
if ($imageType == '.png'){
    imagepng($dst_r,$name); 
}
if ($imageType == '.jpg' || $imageType == '.jpeg'){
    imagejpeg($dst_r,$name, 100); 
    }   
$imageCropped = $name;
$_SESSION['image_cropped'] = $imageCropped;


include('SimpleImage.php');
$imageThumbnail = new SimpleImage();
$imageThumbnail->load($name);
$imageThumbnail->resizeToWidth(200);
$imageThumbnail->save($uploadLocation.'resizedThumbnail_'.$newNameOverwrite);

$imageThumbnailCropped = ($uploadLocation.'resizedThumbnail_'.$newNameOverwrite);

$imageThumbnailCroppedSession = $imageThumbnailCropped;
$_SESSION['image_cropped_thumbnail'] = $imageThumbnailCroppedSession;
}

Answer 1

使用PHP确定它是什么类型的图像，然后动态使用* _png函数而不是* _jpeg函数。 IE，而不是imagecreatefromjpeg使用imagecreatefrompng

如何在我的裁剪脚本中允许PNG？

1 个答案: