Graphics function Library: read_exif_data

Read_exif_data

(PHP4 >= 4.0.1)

Read_exif_data---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; To read an EXIF header from a JPEG graphics file

Syntax: Array read_exif_data (string filename)

Description:

Read_exif_data () reads the EXIF header from the JPEG graphics file. It returns an array whose index value is the EXIF header name, and the value of the array is the value of those headers. Exif headers tend to be produced by digital cameras in JPEG graphics, but unfortunately, the various digital camera manufacturers have different ideas on how to actually label them, so you can't trust a specific EXIF header that currently exists.

Example:

<?php

$exif = Read_exif_data (' p0001807.jpg ');

while (list ($k, $v) =each ($exif)) {

echo "$k: $v <br>\n";

}

?>

Output:

FileName:p0001807.jpg

filedatetime:929353056

filesize:378599

Cameramake:eastman Kodak Company

Cameramodel:kodak DC265 ZOOM DIGITAL CAMERA (V01.00)

Datetime:1999:06:14 01:37:36

height:1024

width:1536

Iscolor:1

flashused:0

focallength:8.0mm

Rawfocallength:8

exposuretime:0.004 s (1/250)

rawexposuretime:0.0040000001899898

aperturefnumber:f/9.5

rawaperturefnumber:9.5100002288818

focusdistance:16.66m

rawfocusdistance:16.659999847412

Orientation:1

exifversion:0200

Note: You need to join--ENABLE-EXIF to use this function when compiling PHP

This function does not require the GD graphics library.