展開圖片調整大小腳本爲.PNG和.GIF

Question

我有一個腳本，可以完美調整.JPG圖片的大小，它完全按照它應該做的。 但是，我想爲用戶提供添加.PNG en .GIF圖像的選項。有人可以幫助我擴展下面的腳本，所以它也支持這些格式？提前致謝！

$image = $_POST['bedrijfslogo']; 
$new_image = "../subdomains/{$gemeente7}/httpdocs/{$plaatsnaam7}/{$bedrijfsnaam7}/bedrijfslogo.jpg"; 
copy($_POST['bedrijfslogo'],"copylogo.jpg"); 
$width=250; //*** Fix Width & Heigh (Autu caculate) ***// 
$size=GetimageSize($image); 
$height=round($width*$size[1]/$size[0]); 
$images_orig = ImageCreateFromJPEG($image); 
$photoX = ImagesX($images_orig); 
$photoY = ImagesY($images_orig); 
$images_fin = ImageCreateTrueColor($width, $height); 
ImageCopyResampled($images_fin, $images_orig, 0, 0, 0, 0, $width+1, $height+1, $photoX, $photoY); 
ImageJPEG($images_fin, $new_image); 
ImageDestroy($images_orig); 
ImageDestroy($images_fin); 
unlink($image); 

Answer 1

取決於OUTPUTFILE你想要的類型，添加和選擇：

imagecreatefrompng 

和

imagecreatefromgif 

和

imagepng 

和

imagegif 

Answer 2

繼我的評論後，我意識到你可以從getimagesize()返回的數據中提取圖像的類型。

試試這個，它應該接受任何類型的圖像，你的PHP實例能夠理解（未經測試）：

// Get file paths 
// Taking a local file path direct from the user? This is a *big* security risk... 
$srcPath = $_POST['bedrijfslogo']; 
$dstPath = "../subdomains/{$gemeente7}/httpdocs/{$plaatsnaam7}/{$bedrijfsnaam7}/bedrijfslogo.jpg"; 

// Not really sure why this is here, you don't seem to use the copy of the file 
copy($srcPath, "copylogo.jpg"); 

// Get information about source image 
$info = getimagesize($srcPath); 
$srcWidth = $info[0]; 
$srcHeight = $info[1]; 
$srcType = $info[2]; 

// Calculate new width and height 
// Width is fixed, height calculated from width 
$dstWidth = 250; 
$dstHeight = round($dstWidth * $srcHeight/$srcWidth); 

// Get the image types supported by this instance of PHP 
$supportedTypes = imagetypes(); 

// Create the source image resource based on it's type 
switch ($srcType) { 
    case IMG_GIF: 
    if ($supportedTypes & IMG_GIF) { 
     $srcImage = imagecreatefromgif($srcPath); 
    } else { 
     // GIF support not enabled on your PHP instance. Handle error here. 
     exit('GIF support not enabled on this PHP instance'); 
    } 
    break; 
    case IMG_JPG: case IMG_JPEG: // Think these might have the same value? 
    if ($supportedTypes & IMG_JPG) { 
     $srcImage = imagecreatefromjpeg($srcPath); 
    } else { 
     // JPEG support not enabled on your PHP instance. Handle error here. 
     exit('JPEG support not enabled on this PHP instance'); 
    } 
    break; 
    case IMG_PNG: 
    if ($supportedTypes & IMG_PNG) { 
     $srcImage = imagecreatefrompng($srcPath); 
    } else { 
     // PNG support not enabled on your PHP instance. Handle error here. 
     exit('PNG support not enabled on this PHP instance'); 
    } 
    break; 
    case IMG_WBMP: 
    if ($supportedTypes & IMG_WBMP) { 
     $srcImage = imagecreatefromwbmp($srcPath); 
    } else { 
     // WBMP support not enabled on your PHP instance. Handle error here. 
     exit('WBMP support not enabled on this PHP instance'); 
    } 
    break; 
    case IMG_XPM: 
    if ($supportedTypes & IMG_XPM) { 
     $srcImage = imagecreatefromxpm($srcPath); 
    } else { 
     // XPM support not enabled on your PHP instance. Handle error here. 
     exit('XPM support not enabled on this PHP instance'); 
    } 
    break; 
    default: 
    // Unknown input file type. Handle error here. Currently prints some debugging info 
    echo 'Unknown input file type'; 
    var_dump($info); 
    exit; 
} 

// Create the destination image resource 
$dstImage = imagecreatetruecolor($dstWidth, $dstHeight); 

// Resample source image onto destination image 
imagecopyresampled($dstImage, $srcImage, 0, 0, 0, 0, $dstWidth + 1, $dstHeight + 1, $srcWidth, $srcHeight); 

// Save new image to disk 
imagejpeg($dstImage, $dstPath); 

// Destroy resources 
imagedestroy($srcImage); 
imagedestroy($dstImage); 
$srcImage = $dstImage = NULL; 

// Remove source image - are you sure you want to do this? 
unlink($srcPath); 

現在，這個代碼似乎被設計成一個本地源圖像工作，但是您使用它的方式表明您可能會從用戶那裏獲取URL並下載遠程圖像。如果是這種情況，請告訴我，我會稍微修改以達到更好的目的。

Answer 3

有什麼變化，

$images_orig = ImageCreateFromJPEG($image); //for jpg 

您可以檢查here文檔

你也可以去通過Some comparisons between ImageMagick and GD和PHP: ImageMagick - Manual。

希望這有助於