PHP如何读取照片的exif信息实现代码_随笔

先来了解什么是图片的Exif信息

Exif是一种图象文件格式，它的数据存储与JPEG格式是完全相同的。

实际上Exif格式就是在JPEG格式头部插入了数码照片的信息，包括拍摄时的光圈、快门、白平衡、ISO、焦距、日期时间等各种和拍摄条件以及相机品牌、型号、色彩编码、拍摄时录制的声音以及全球定位系统（GPS）、缩略图等。简单地说，Exif=JPEG+拍摄参数。

因此，你可以利用任何可以查看JPEG文件的看图软件浏览Exif格式的照片，但并不是所有的图形程序都能处理Exif信息。

具体代码你可以参考下面的

/**

* 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+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

}

$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>

</head>

<body>

<!--

//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>

兄弟，你要注意区分好php和JS的区别啊。帮你搞定了。

//wp_442057835.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>Ajax Get Picture</title>

</head>

<body>

function last_pic() {

userid = document.getElementById("user_pic").getAttribute("imgid") //使用imgid存储当前照片id

xmlHttp=GetXmlHttpObject()

if (xmlHttp==null) {

alert ("Browser does not support HTTP Request")

return null

}

var q="1"

var url="wp_442057835_process.php?q="+q+"&u="+userid+"&sid="+Math.random()

xmlHttp.onreadystatechange=stateChanged

xmlHttp.open("GET",url,true)

xmlHttp.send(null)

}

function next_pic() {

userid = document.getElementById("user_pic").getAttribute("imgid")

xmlHttp=GetXmlHttpObject()

if (xmlHttp==null) {

alert ("Browser does not support HTTP Request")

return null

}

var q="2"

var url="wp_442057835_process.php?q="+q+"&u="+userid+"&sid="+Math.random()

xmlHttp.onreadystatechange=stateChanged

xmlHttp.open("GET",url,true)

xmlHttp.send(null)

}

function stateChanged() {

if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){

var nuserid=xmlHttp.responseText

var newImage = document.getElementById("user_pic")

newImage.setAttribute("src", "user_pic/"+nuserid+".jpg")

newImage.setAttribute("imgid", nuserid)

}

function GetXmlHttpObject(){

var request

var browser = navigator.appName

if(browser == "Microsoft Internet Explorer"){

var arrVersions = ["Microsoft.XMLHTTP","MSXML2.XMLHttp.4.0",

"MSXML2.XMLHttp.3.0","MSXML2.XMLHttp.5.0"]

for(var i=0i <arrVersions.lengthi++){

try{

request = new ActiveXObject(arrVersions[i])

return request

}catch(exception){

//忽略，继续

}

}else{

request = new XMLHttpRequest()

return request

}

</script>

<img src="<?php echo "user_pic/1.jpg" ?>" alt="修改头像" hspace="7" id="user_pic" width="200px" height="100px" imgid="1"/>

</body>

</html>

//wp_442057835_process.php

<?php

header("content-type:textmlcharset=utf-8")

include("db.php")

//echo $_GET["q"]

//echo $_GET["u"]

$userid=$_GET["u"]

if($_GET["q"]==1)

{

$lquery=mysql_query("SELECT * FROM usermember WHERE userid <$userid ORDER BY userid DESC LIMIT 1 ")

$last_user =mysql_fetch_object($lquery)

$last_userid=$last_user->userid

if(empty($last_userid)) $last_userid = $userid

echo $last_userid

}

if($_GET["q"]=="2")

{

$nquery=mysql_query("SELECT * FROM usermember WHERE userid >$userid ORDER BY userid ASC LIMIT 1 ")

$next_user =mysql_fetch_object($nquery)

$next_userid=$next_user->userid

if(empty($next_userid)) $next_userid = $userid

echo $next_userid

}

http://www.phpsu.com/phpjc/20080812/5469.html

一段php上传图片代码

我不太懂，只给你拷贝了网站上的一些，你看一下，嘿嘿，看有没有帮助

if($upok){

$open = opendir("images")

if($open==0)

{

mkdir("images")

}

$imagename = $_POST['imagename']

$file = ($_FILES['upfile']['name'])

$file_name = ($_FILES['upfile']['tmp_name'])

phpsu.com is a free phpscool

$image_type = array('jpg', 'gif', 'bmp', 'jpeg', 'pcx', 'tiff', 'png', 'svg')

if (($pos = strrpos($_FILES['upfile']['name'], '.')) !== false) {

$file_ext = strtolower(substr($_FILES['upfile']['name'], $pos + 1))

}

if (!in_array($file_ext, $image_type))

{

echo "<script>alert('只能上传图片格式的文件')location.href='index.php'</script>"

exit()

}

$up = move_uploaded_file($file_name,"images/$file")

if($up==1)

{

echo "<script>alert('上传成功！$upfile_name')location.href='index.php'</script>"

exit()

}

else

{

echo "<script>alert('上传失败！')location.href='index.php'</script>"

exit()

}

?>welcome to phpsu.com

<html>

<head>

<title>PHP图片上传</title>

</head>

<body>

<tr><td>图片源文件：</td><td><input type="file" name="upfile" /></td></tr>

</form>

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原文地址: https://outofmemory.cn/zaji/6272163.html

PHP如何读取照片的exif信息实现代码

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