我建立了一个允许上传图片的网站，一旦上传了图片，就会显示一些关于照片的特定信息。从计算机上传图片效果很好，当我尝试从智能手机上传图片时出现问题。上传成功，但现在从计算机上传时显示的数据的主要部分似乎丢失了。
此代码部分是实际检索和显示数据的部分：
$location = $_FILES["pic"]["tmp_name"];
$data = exif_read_data($location);
var_dump($data);
var_dump($data)实际上会在计算机和智能手机中转储不同的数据。
显然它适用于 Android 智能手机，只有当我尝试从 iPhone 上传图像时才会出现问题。
例如，var_dump从计算机上传：
array(49) {
["FileName"]=> string(10) "php2D4.tmp"
["FileDateTime"]=> int(1367318152)
["FileSize"]=> int(30357)
["FileType"]=> int(2)
["MimeType"]=> string(10) "image/jpeg"
["SectionsFound"]=> string(24) "ANY_TAG, IFD0, EXIF, GPS"
["COMPUTED"]=> array(6) {
["html"]=> string(24) "width="320" height="240""
["Height"]=> int(240)
["Width"]=> int(320)
["IsColor"]=> int(1)
["ByteOrderMotorola"]=> int(1)
["ApertureFNumber"]=> string(5) "f/2.8"
}
["Make"]=> string(5) "Apple"
["Model"]=> string(8) "iPhone 4"
["Orientation"]=> int(3)
["XResolution"]=> string(4) "72/1"
["YResolution"]=> string(4) "72/1"
["ResolutionUnit"]=> int(2)
["Software"]=> string(5) "6.1.3"
["DateTime"]=> string(19) "2013:04:26 23:57:43"
["YCbCrPositioning"]=> int(1)
["Exif_IFD_Pointer"]=> int(204)
["GPS_IFD_Pointer"]=> int(594)
["ExposureTime"]=> string(4) "1/15"
["FNumber"]=> string(4) "14/5"
["ExposureProgram"]=> int(2)
["ISOSpeedRatings"]=> int(1000)
["ExifVersion"]=> string(4) "0221"
["DateTimeOriginal"]=> string(19) "2013:04:26 23:57:43"
["DateTimeDigitized"]=> string(19) "2013:04:26 23:57:43"
["ComponentsConfiguration"]=> string(4) ""
["ShutterSpeedValue"]=> string(9) "4889/1250"
["ApertureValue"]=> string(9) "4281/1441"
["BrightnessValue"]=> string(10) "-3581/1451"
["MeteringMode"]=> int(5)
["Flash"]=> int(24)
["FocalLength"]=> string(5) "77/20"
["SubjectLocation"]=> array(4) {
[0]=> int(1295)
[1]=> int(967)
[2]=> int(699)
[3]=> int(696)
}
["FlashPixVersion"]=> string(4) "0100"
["ColorSpace"]=> int(1)
["ExifImageWidth"]=> int(2592)
["ExifImageLength"]=> int(1936)
["SensingMethod"]=> int(2)
["ExposureMode"]=> int(0)
["WhiteBalance"]=> int(0)
["FocalLengthIn35mmFilm"]=> int(35)
["SceneCaptureType"]=> int(0)
["GPSLatitudeRef"]=> string(1) "N"
["GPSLatitude"]=> array(3) {
[0]=> string(4) "31/1"
[1]=> string(8) "5854/100"
[2]=> string(3) "0/1"
}
["GPSLongitudeRef"]=> string(1) "E"
["GPSLongitude"]=> array(3) {
[0]=> string(4) "34/1"
[1]=> string(8) "4684/100"
[2]=> string(3) "0/1"
}
["GPSTimeStamp"]=> array(3) {
[0]=> string(4) "20/1"
[1]=> string(4) "57/1"
[2]=> string(8) "4272/100"
}
["GPSImgDirectionRef"]=> string(1) "T"
["GPSImgDirection"]=> string(9) "48089/465"
}
var_dump从智能手机上传：
array(12) {
["FileName"]=> string(9) "phpSzwfPw"
["FileDateTime"]=> int(1367318054)
["FileSize"]=> int(1778041)
["FileType"]=> int(2)
["MimeType"]=> string(10) "image/jpeg"
["SectionsFound"]=> string(19) "ANY_TAG, IFD0, EXIF"
["COMPUTED"]=> array(5) {
["html"]=> string(26) "width="2592" height="1936""
["Height"]=> int(1936)
["Width"]=> int(2592)
["IsColor"]=> int(1)
["ByteOrderMotorola"]=> int(1)
}
["Orientation"]=> int(3)
["Exif_IFD_Pointer"]=> int(38)
["ColorSpace"]=> int(1)
["ExifImageWidth"]=> int(2592)
["ExifImageLength"]=> int(1936)
}
这是电脑 var_dump($_FILES)：
array(1)
{ ["pic"]=> array(5)
{ ["name"]=> string(18) leaf2.JPG"
["type"]=> string(10) "image/jpeg"
["tmp_name"]=> string(14) "/tmp/phpzeDUs9"
["error"]=> int(0)
["size"]=> int(46439) } }
这是iPhone的结果var_dump($_FILES)：
array(1) { ["pic"]=> array(5)
{ ["name"]=> string(9) "image.jpg"
["type"]=> string(10) "image/jpeg"
["tmp_name"]=> string(14) "/tmp/phplPUZky"
["error"]=> int(0) ["size"]=> int(1455577) } }
编辑：这是上传表单的 HTML 代码：
<form action="results.php" id="upload-image" method="post" enctype="multipart/form-data">
<div class="fileupload fileupload-new" data-provides="fileupload">
<div class="fileupload-preview thumbnail" style="width: 200px; height: 150px;"></div>
<div>
<span class="btn btn-file"><span class="fileupload-new">Select image</span><span class="fileupload-exists">Change</span><input type="file" name="pic" id="pic" accept="image/*"/></span>
<a href="#" class="btn fileupload-exists" data-dismiss="fileupload">Remove</a>
<button type="submit" class="btn">Upload</button>
</br>
<span class="upload-error"></span>
</div>
</form>
什么可能导致它？