我有一個php名為的函數compressImage()，如下所示：function compressImage($source, $destination, $quality) { $info = getimagesize($source); if ($info['mime'] == 'image/jpeg') $image = imagecreatefromjpeg($source); elseif ($info['mime'] == 'image/gif') $image = imagecreatefromgif($source); elseif ($info['mime'] == 'image/png') $image = imagecreatefrompng($source); imagejpeg($image, $destination, $quality); }我正在嘗試使用此功能壓縮上傳的圖像。在一個php名為的文件中add1.php，我這樣調用這個函數：if (!empty($_FILES['image1']['name'])) { $temp = explode(".", $_FILES["image1"]["name"]); $newName = date('Ymdhis')."1"; $newName = strval($newName) . "." . end($temp); $newPath = '../uploads/'.$newName; move_uploaded_file($_FILES['image1']['tmp_name'], $target_dir . $newName); compressImage($newPath, $newPath, 60); $image1 = $newName;}這在我上傳jpeg圖像時有效，它實際上減小了它們的大小。但是當我上傳png文件時，它們已上傳但已損壞且無法打開。我不知道這個問題的原因是什么。任何幫助，將不勝感激。謝謝
2 回答
喵喔喔
TA貢獻1735條經驗 獲得超5個贊
您可以修改compressImage它，使其生成與提供的格式相同的圖像，并在需要時使用函數的返回值進行進一步處理。
function compressImage( $source=false, $destination=false, $quality=80, $filters=false ) {
$info = getimagesize( $source );
switch( $info['mime'] ){
case 'image/jpeg':
/* Quality: integer 0 - 100 */
if( !is_int( $quality ) or $quality < 0 or $quality > 100 ) $quality=80;
$image = imagecreatefromjpeg( $source );
return imagejpeg( $image, $destination, $quality );
case 'image/gif':
$image = imagecreatefromgif( $source );
return imagegif( $image, $destination );
case 'image/png':
/* Quality: Compression integer 0(none) - 9(max) */
if( !is_int( $quality ) or $quality < 0 or $quality > 9 )$quality=6;
$image = imagecreatefrompng( $source );
return imagepng( $image, $destination, $quality, $filters );
case 'image/webp':
/* Quality: Compression 0(lowest) - 100(highest) */
if( !is_int( $quality ) or $quality < 0 or $quality > 100 )$quality=80;
$image=imagecreatefromwebp( $source );
return imagewebp( $image, $destination, $quality );
case 'image/bmp':
/* Quality: Boolean for compression */
if( !is_bool( $quality ) )$quality=true;
$image=imagecreatefrombmp( $source );
return imagebmp( $image, $destination, $quality );
default:exit( sprintf( 'Unknown type: %s',$info['mime'] ) );
}
}
使用返回值
if( compressImage($newPath, $newPath, 60) ){ /* success */ }
else { /* Failure */ }
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