PHP中利用EXIF函数集来显示单反照片的EXIF信息

wyyy721

　　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:0221FlashPix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:1/250F-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:-7/10EVISO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:UncalibratedExif图像宽度:4032Exif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.