PHP实现显示照片exif信息的方法

PHP编程可实现显示照片EXIF信息，显示图片中缩略图效果，其代码如下：
<?/*** 获取图象信息的函数* 一个全面获取图象信息的函数* @access public* @param string $img 图片路径* @return array*/function GetImageInfoVal（$ImageInfo,$val_arr） {$InfoVal="未知";foreach（$val_arr as $name=>$val） {if （$name==$ImageInfo） {$InfoVal=&$val;break;}}return $InfoVal;}function GetImageInfo（$img） {$imgtype=array（"", "GIF", "JPG", "PNG", "SWF", "PSD", "BMP", "TIFF（intel byte order）", "TIFF（motorola byte order）", "JPC", "JP2", "JPX", "JB2", "SWC", "IFF", "WBMP", "XBM"）;$Orientation=array（"", "top left side", "top right side", "bottom right side", "bottom left side", "left side top", "right side top", "right side bottom", "left side bottom"）;$ResolutionUnit=array（"", "", "英寸", "厘米"）;$YCbCrPositioning=array（"", "the center of pixel array", "the datum point"）;$ExposureProgram=array（"未定义", "手动", "标准程序", "光圈先决", "快门先决", "景深先决", "运动模式", "肖像模式", "风景模式"）;$MeteringMode_arr=array（"0"=>"未知","1"=>"平均","2"=>"中央重点平均测光","3"=>"点测","4"=>"分区","5"=>"评估","6"=>"局部","255"=>"其他"）;$Lightsource_arr=array（"0"=>"未知","1"=>"日光","2"=>"荧光灯","3"=>"钨丝灯","10"=>"闪光灯","17"=>"标准灯光A","18"=>"标准灯光B","19"=>"标准灯光C","20"=>"D55","21"=>"D65","22"=>"D75","255"=>"其他"）;$Flash_arr=array（"0"=>"flash did not fire","1"=>"flash fired","5"=>"flash fired but strobe return light not detected","7"=>"flash fired and strobe return light detected",）;$exif = exif_read_data （$img,"IFD0"）;if （$exif===false） {$new_img_info=array （"文件信息"=>"没有图片EXIF信息"）;}else{$exif = exif_read_data （$img,0,true）;$new_img_info=array （"文件信息"=>"-----------------------------","文件名"=>$exif[FILE][FileName],"文件类型"=>$imgtype[$exif[FILE][FileType]],"文件格式"=>$exif[FILE][MimeType],"文件大小"=>$exif[FILE][FileSize],"时间戳"=>date（"Y-m-d H:i:s",$exif[FILE][FileDateTime]）,"图像信息"=>"-----------------------------","图片说明"=>$exif[IFD0][ImageDescription],"制造商"=>$exif[IFD0][Make],"型号"=>$exif[IFD0][Model],"方向"=>$Orientation[$exif[IFD0][Orientation]],"水平分辨率"=>$exif[IFD0][XResolution].$ResolutionUnit[$exif[IFD0][ResolutionUnit]],"垂直分辨率"=>$exif[IFD0][YResolution].$ResolutionUnit[$exif[IFD0][ResolutionUnit]],"创建软件"=>$exif[IFD0][Software],"修改时间"=>$exif[IFD0][DateTime],"作者"=>$exif[IFD0][Artist],"YCbCr位置控制"=>$YCbCrPositioning[$exif[IFD0][YCbCrPositioning]],"版权"=>$exif[IFD0][Copyright],"摄影版权"=>$exif[COMPUTED][Copyright.Photographer],"编辑版权"=>$exif[COMPUTED][Copyright.Editor],"拍摄信息"=>"-----------------------------","Exif版本"=>$exif[EXIF][ExifVersion],"FlashPix版本"=>"Ver. ".number_format（$exif[EXIF][FlashPixVersion]/100,2）,"拍摄时间"=>$exif[EXIF][DateTimeOriginal],"数字化时间"=>$exif[EXIF][DateTimeDigitized],"拍摄分辨率高"=>$exif[COMPUTED][Height],"拍摄分辨率宽"=>$exif[COMPUTED][Width],/*The actual aperture value of lens when the image was taken.Unit is APEX.To convert this value to ordinary F-number（F-stop）,calculate this value"s power of root 2 （=1.4142）.For example, if the ApertureValue is "5", F-number is pow（1.41425,5） = F5.6.*/"光圈"=>$exif[EXIF][ApertureValue],"快门速度"=>$exif[EXIF][ShutterSpeedValue],"快门光圈"=>$exif[COMPUTED][ApertureFNumber],"最大光圈值"=>"F".$exif[EXIF][MaxApertureValue],"曝光时间"=>$exif[EXIF][ExposureTime],"F-Number"=>$exif[EXIF][FNumber],"测光模式"=>GetImageInfoVal（$exif[EXIF][MeteringMode],$MeteringMode_arr）,"光源"=>GetImageInfoVal（$exif[EXIF][LightSource], $Lightsource_arr）,"闪光灯"=>GetImageInfoVal（$exif[EXIF][Flash], $Flash_arr）,"曝光模式"=>（$exif[EXIF][ExposureMode]==1?"手动":"自动"）,"白平衡"=>（$exif[EXIF][WhiteBalance]==1?"手动":"自动"）,"曝光程序"=>$ExposureProgram[$exif[EXIF][ExposureProgram]],/*Brightness of taken subject, unit is APEX. To calculate Exposure（Ev） from BrigtnessValue（Bv）, you must add SensitivityValue（Sv）.Ev=Bv+SvSv=log（（ISOSpeedRating/3.125）,2）ISO100:Sv=5, ISO200:Sv=6, ISO400:Sv=7, ISO125:Sv=5.32. */"曝光补偿"=>$exif[EXIF][ExposureBiasValue]."EV","ISO感光度"=>$exif[EXIF][ISOSpeedRatings],"分量配置"=>（bin2hex（$exif[EXIF][ComponentsConfiguration]）=="01020300"?"YCbCr":"RGB"）,//"0x04,0x05,0x06,0x00"="RGB" "0x01,0x02,0x03,0x00"="YCbCr""图像压缩率"=>$exif[EXIF][CompressedBitsPerPixel]."Bits/Pixel","对焦距离"=>$exif[COMPUTED][FocusDistance]."m","焦距"=>$exif[EXIF][FocalLength]."mm","等价35mm焦距"=>$exif[EXIF][FocalLengthIn35mmFilm]."mm",/*Stores user comment. This tag allows to use two-byte character code or unicode. First 8 bytes describe the character code. "JIS" is a Japanese character code （known as Kanji）."0x41,0x53,0x43,0x49,0x49,0x00,0x00,0x00":ASCII"0x4a,0x49,0x53,0x00,0x00,0x00,0x00,0x00":JIS"0x55,0x4e,0x49,0x43,0x4f,0x44,0x45,0x00":Unicode"0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00":Undefined*/"用户注释编码"=>$exif[COMPUTED][UserCommentEncoding],"用户注释"=>$exif[COMPUTED][UserComment],"色彩空间"=>（$exif[EXIF][ColorSpace]==1?"sRGB":"Uncalibrated"）,"Exif图像宽度"=>$exif[EXIF][ExifImageLength],"Exif图像高度"=>$exif[EXIF][ExifImageWidth],"文件来源"=>（bin2hex（$exif[EXIF][FileSource]）==0x03?"digital still camera":"unknown"）,"场景类型"=>（bin2hex（$exif[EXIF][SceneType]）==0x01?"A directly photographed image":"unknown"）,"缩略图文件格式"=>$exif[COMPUTED][Thumbnail.FileType],"缩略图Mime格式"=>$exif[COMPUTED][Thumbnail.MimeType]）;}return $new_img_info;}$innerhtml="";$exif=GetImageInfo（$_GET["img"]）;$innerhtml.="<TABLE>";foreach（$exif as $name=>$val） {$innerhtml.="<TR><TD>{$name}</TD><TD>{$val}</TD></TR>";}$innerhtml.="<TR><TD colspan="2">";if （$_GET["img"]） {$image = exif_thumbnail（$_GET["img"]）;} else {$image = false;}if （$image！==false） {$innerhtml.="<img src="thumbnail.php?img=".$_GET["img"]."">";} else {// no thumbnail available, handle the error here$innerhtml.="No thumbnail available";}$innerhtml.="</TD></TR></TABLE>";?><html><head> <title>图片信息</title><meta http-equiv="Content-Type" content="text/html; charset=??????"></head><body><SCRIPT><！--//初始化内容值parent.followTd<?=$_GET["r_id"];?>.innerHTML="<?=$innerhtml;?>";//已读取parent.document.images.followImg<?=$_GET["r_id"];?>.loaded="yes";--></SCRIPT></body></html>