我有用于上傳、調整大小和水印照片的 PHP 代碼。一切正常，除非照片是從某些移動設備上傳的，然后照片的方向有問題（照片旋轉了 90°）我找到了一些解決方案（How to check/fix image rotation before使用 PHP 上傳圖片）但我無法在我的代碼中實現它，因為我對 php 了解不夠。我相信我需要在設置水印之前進行方向校正。這是沒有方向校正的代碼：
2 回答
明月笑刀無情
TA貢獻1828條經驗 獲得超4個贊
這是由于照片中的可交換信息。大多數從 iphone 或 DSLR 拍攝的照片都有 exif 數據。
? ?<?php
? ? $image = imagecreatefromstring(file_get_contents($_FILES['image_upload']['tmp_name']));
? ? $exif = exif_read_data($_FILES['image_upload']['tmp_name']);
? ? if(!empty($exif['Orientation'])) {
? ? switch($exif['Orientation']) {
? ? ? ? case 8:
? ? ? ? ? ? $image = imagerotate($image,90,0);
? ? ? ? ? ? break;
? ? ? ? case 3:
? ? ? ? ? ? $image = imagerotate($image,180,0);
? ? ? ? ? ? break;
? ? ? ? case 6:
? ? ? ? ? ? $image = imagerotate($image,-90,0);
? ? ? ? ? ? break;
? ? }
}
// $image now contains a resource with the image oriented correctly
?>
上面是修復旋轉的代碼
慕尼黑的夜晚無繁華
TA貢獻1864條經驗 獲得超6個贊
這是現在對我有用的解決方案。圖像方向校正代碼在第 50-70 行。可能有更好的解決方案，但這是我唯一能夠正常工作的事情：
<?php
if(isset($_FILES['image'])){
$errors= array();
foreach($_FILES['image']['tmp_name'] as $key => $tmp_name ){
$file_name =$_FILES['image']['name'][$key];
$file_size =$_FILES['image']['size'][$key];
$file_tmp =$_FILES['image']['tmp_name'][$key];
$file_type=$_FILES['image']['type'][$key];
// Remove encoding problem
$file_name = Normalizer::normalize($file_name);
setlocale(LC_ALL,'bs_BA.UTF-8');
// get file extension
$fileType = strtolower(pathinfo($file_name, PATHINFO_EXTENSION));
$temp = pathinfo($file_name, PATHINFO_EXTENSION);
$name = str_replace($temp, '', $file_name);
// get filename without extension
$fileNewName = pathinfo($name, PATHINFO_FILENAME);
$watermarkImagePath = 'watermark.png';
$folderPath = "a/";
$sourceProperties = getimagesize($file_tmp);
$imageType = $sourceProperties[2];
// Resize code
switch ($imageType) {
case IMAGETYPE_PNG:
$imageResourceId = imagecreatefrompng($file_tmp);
$targetLayer = imageResize($imageResourceId,$sourceProperties[0],$sourceProperties[1]);
imagepng($targetLayer,$folderPath. $fileNewName. ".jpg");
break;
case IMAGETYPE_GIF:
$imageResourceId = imagecreatefromgif($file_tmp);
$targetLayer = imageResize($imageResourceId,$sourceProperties[0],$sourceProperties[1]);
imagegif($targetLayer,$folderPath. $fileNewName. ".jpg");
break;
case IMAGETYPE_JPEG:
$imageResourceId = imagecreatefromjpeg($file_tmp);
$targetLayer = imageResize($imageResourceId,$sourceProperties[0],$sourceProperties[1]);
imagejpeg($targetLayer,$folderPath. $fileNewName. ".jpg");
break;
default:
echo "Invalid Image type.";
exit;
break;
}
// Image Orientation correction
$targetFilePath = $folderPath . $file_name;
$exif = exif_read_data($file_tmp);
if ($exif['Orientation']==3 OR $exif['Orientation']==6 OR $exif['Orientation']==8) {
$imageResource = imagecreatefromjpeg($targetFilePath);
switch ($exif['Orientation']) {
case 3:
$image = imagerotate($imageResource, 180, 0);
break;
case 6:
$image = imagerotate($imageResource, -90, 0);
break;
case 8:
$image = imagerotate($imageResource, 90, 0);
break;
}
imagejpeg($image, $targetFilePath);
imagedestroy($imageResource);
imagedestroy($image);
}
// watermark code
$watermarkImg = imagecreatefrompng($watermarkImagePath);
if(preg_match('/[.](jpg)$/i', $file_name)) {
$im = imagecreatefromjpeg($targetFilePath);
} else if (preg_match('/[.](jpeg)$/i', $file_name)) {
$im = imagecreatefromjpeg($targetFilePath);
} else if (preg_match('/[.](png)$/i', $file_name)) {
$im = imagecreatefrompng($targetFilePath);
} else if (preg_match('/[.](gif)$/i', $file_name)) {
$im = imagecreatefromgif($targetFilePath);
}
$marge_right = 1;
$marge_bottom = 1;
$sx = imagesx($watermarkImg);
$sy = imagesy($watermarkImg);
imagecopy($im, $watermarkImg, imagesx($im) - $sx - $marge_right, imagesy($im) - $sy - $marge_bottom, 0, 0, imagesx($watermarkImg), imagesy($watermarkImg));
imagejpeg($im, $targetFilePath,70);
imagedestroy($im);
}
echo ' Successful upload';
}
function imageResize($imageResourceId,$width,$height) {
if($width > $height){
$targetWidth=1000;
$targetHeight=($height/$width)*$targetWidth;
} else {
$targetHeight=1000;
$targetWidth=($width/$height)*$targetHeight;}
$targetLayer=imagecreatetruecolor($targetWidth,$targetHeight);
imagecopyresampled($targetLayer,$imageResourceId,0,0,0,0,$targetWidth,$targetHeight, $width,$height);
return $targetLayer;
}
?>
<div class="sender">
<form action="" method="POST" enctype="multipart/form-data">
<input type="file" name="image[]" multiple/>
<input type="submit" value="Send"/>
</form></div>
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