PHP中利用EXIF函数集来显示单反照片的EXIF信息

浏览数：12 / 时间：2015年06月09日

要成功做到能用EXIF函数显示单反EXIF信息需要一下几个不步骤:

1.修改php.ini的exif相关信息

2.继续修改php.ini信息,找到以下模块,将带exif的配置属性前的;号去掉,然后重启apache

3.验证php确实开启了exif模块成功,利用以下代码

<?php
echo phpinfo();
?>

如果看到显示下图,则表示成功开启了exif模块,这样我们就可以开始利用其函数集了

4.开始写相关类(或函数,是别人封装好的,我个人觉得这个合适),如下,大家可以自己自行修改其中代码以供自己使用

<?php
   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+Sv Sv=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;
   }

5.写测试代码

<?php
   header("content-type:text/html;charset=utf-8");
   $filename = "test.jpg";
   require ‘pic.class.php‘;
   $new_img_info = GetImageInfo($filename);
   //echo $new_img_info;
   foreach ($new_img_info as $key=> $section) {
           echo $key.":".$section."<hr>";
   }
?>

6.结果如图所示

文件信息:-----------------------------

文件名:test.jpg

文件类型:JPG

文件格式:image/jpeg

文件大小:477883

时间戳:2014-03-07 14:53:57

图像信息:-----------------------------

图片说明:SONY DSC

制造商:SONY

型号:DSLR-A900

方向:top left side