PHP中利用EXIF函数集回显示单反照片的EXIF信息

PHP中利用EXIF函数集来显示单反照片的EXIF信息

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

    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

    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

    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."

---

";
    }
?>

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

---

水平分辨率:2400000/10000英寸

---

垂直分辨率:2400000/10000英寸

---

创建软件:Adobe Photoshop CS6 (Windows)

---

修改时间:2014:01:13 14:02:59

---

作者:

---

YCbCr位置控制:

---

版权:

---

摄影版权:

---

编辑版权:

---

拍摄信息:-----------------------------

---

Exif版本:0221

---

FlashPix版本:Ver. 0.00

---

拍摄时间:2014:01:10 12:06:40

---

数字化时间:2014:01:10 12:06:40

---

拍摄分辨率高:806

---

拍摄分辨率宽:1210

---

光圈:761471/100000

---

快门速度:7965784/1000000

---

快门光圈:f/14.0

---

最大光圈值:F434/100

---

曝光时间:1/250

---

F-Number:14/1

---

测光模式:评估

---

光源:未知

---

闪光灯:未知

---

曝光模式:自动

---

白平衡:自动

---

曝光程序:光圈先决

---

曝光补偿:-7/10EV

---

ISO感光度:100

---

分量配置:RGB

---

图像压缩率:Bits/Pixel

---

对焦距离:m

---

焦距:120/10mm

---

等价35mm焦距:12mm

---

用户注释编码:

---

用户注释:

---

色彩空间:Uncalibrated

---

Exif图像宽度:4032

---

Exif图像高度:6048

---

文件来源:digital still camera

---

场景类型:A directly photographed image

---

缩略图文件格式:

---

缩略图Mime格式:

---

至此,一个简单利用exif函数集来显示图片的exif信息的模块就出来了.