前台代码
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>test</title>
</head>
<body>
<form action="/index/index/upfile" method="post" accept-charset="utf-8" enctype="multipart/form-data">
<input type="file" name="up1" id="up1" value="" />
<button type="submit">上传</button>
</form>
</body>
</html>
后台代码
//获取文件类型 - 扩展名
private function getType($filename){
$temp_arr = explode(".", $filename);
$file_ext = array_pop($temp_arr);
$file_ext = trim($file_ext);
$file_ext = strtolower($file_ext);
return $file_ext;
}
//获取上传设备信息 - 如果非iphone,ipad苹果设备 返回 0
private function getFileVer($user_agent){
$ua = strtolower($user_agent);
if(strpos($ua,"iphone") || strpos($ua,"ipad") || strpos($ua,"ipod") || strpos($ua,"ios")){
$verArr = explode('cpu iphone os',$ua);
$verArr2 = explode('like mac os',$verArr[1]);
$ver = trim($verArr2[0]);
$ver = str_replace("_","",$ver);
$ver = intval($ver);
if(strlen($ver)<7) {
$ver = $ver*pow(10,(7-strlen($ver)));
}
return $ver;
}else{
return 0;
}
}
//图片格式转换
private function transform_image($image_path, $to_ext = 'png', $save_path = null)
{
if (! in_array($to_ext, ['png', 'gif', 'jpeg', 'wbmp', 'webp', 'xbm'])) {
throw new \Exception('unsupport transform image to ' . $to_ext);
}
switch (exif_imagetype($image_path)) {
case IMAGETYPE_GIF :
$img = imagecreatefromgif($image_path);
break;
case IMAGETYPE_JPEG :
case IMAGETYPE_JPEG2000:
$img = imagecreatefromjpeg($image_path);
break;
case IMAGETYPE_PNG:
$img = imagecreatefrompng($image_path);
break;
case IMAGETYPE_BMP:
case IMAGETYPE_WBMP:
$img = imagecreatefromwbmp($image_path);
break;
case IMAGETYPE_XBM:
$img = imagecreatefromxbm($image_path);
break;
case IMAGETYPE_WEBP: //(从 PHP 7.1.0 开始支持)
$img = imagecreatefromwebp($image_path);
break;
default :
throw new \Exception('Invalid image type');
}
$function = 'image'.$to_ext;
if ($save_path) {
return $function($img, $save_path);
} else {
$tmp = __DIR__.'/'.uniqid().'.'.$to_ext;
if ($function($img, $tmp)) {
$content = file_get_contents($tmp);
unlink($tmp);
return $content;
} else {
unlink($tmp);
throw new \Exception('the file '.$tmp.' can not write');
}
}
}
/**
* 解决iPhone图片旋转问题
* $src 图片绝对路径
* $ver 手机版本号
* **/
private function rotateImage($filename,$ver){
$type = $this->getType($filename);
if($type == 'png' || $type == 'PNG') {
$this->transform_image($filename,'jpeg',$filename);
}
$exif = exif_read_data($filename);
if(!empty($exif['Orientation']) && $ver>0) {
$orientation = $exif['Orientation'];
if($exif['MimeType'] == 'image/gif'){
$image = imagecreatefromgif($filename);
}else if($exif['MimeType'] == 'image/png'){
$image = imagecreatefrompng($filename);
}else{
$image = imagecreatefromjpeg($filename);
}
if($ver < 1350000) {
switch ($orientation) {
case 8;
$image = imagerotate($image, 270, 0);
break;
case 3:
$image = imagerotate($image, 0, 0);
break;
case 6:
$image = imagerotate($image, 0, 0);
break;
}
}else if($ver >= 1350000 && $ver <1400000){
switch ($orientation) {
case 8;
$image = imagerotate($image, 0, 0);
break;
case 3:
$image = imagerotate($image, 0, 0);
break;
case 6:
$image = imagerotate($image, 0, 0);
break;
case 1:
$image = imagerotate($image, 0, 0);
break;
}
}else if($ver >= 1400000 && $ver < 1500000){
switch ($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;
case 1:
$image = imagerotate($image, 0, 0);
break;
}
}else{
switch ($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;
}
}
if($exif['MimeType'] == 'image/gif'){
imagegif($image,$filename);
}else if($exif['MimeType'] == 'image/png'){
imagepng($image,$filename);
}else{
imagejpeg($image,$filename);
}
imagedestroy($image);
}
}