JPEG EXIF Data
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Display all EXIF data for a particular jpg file
<?php
echo "test1.jpg:<br />\n";
$exif = exif_read_data('tests/test1.jpg', 'IFD0');
echo $exif===false ? "No header data found.<br />\n" : "Image contains headers<br />\n";
$exif = exif_read_data('tests/test2.jpg', 0, true);
echo "test2.jpg:<br />\n";
foreach ($exif as $key => $section) {
foreach ($section as $name => $val) {
echo "$key.$name: $val<br />\n";
}
}
?>
Display "built-in" thumbnail from jpg file
Save as showthumb.php to use with following "gallery" page. Also consider adding error checking from listing farther below.
<?php
$imgdat = exif_thumbnail($_REQUEST['image'],$width, $height, $type);
header('Content-type: ' . image_type_to_mime_type($type));
echo($imgdat);
?>
Display "gallery" of thumbnails for all jpg files in a directory with selected EXIF data
<html>
<head></head>
<body>
<table>
<?php
// define directory path
$dir = ".";
// iterate through files
// look for JPEGs
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($image = readdir($dh)) !== false) {
if (preg_match("/.jpg/", $image)) {
// read EXIF headers
$exif = exif_read_data($image, 0, true);
echo "<tr>";
// get thumbnail
// link to full image
echo("<td valign=top><A href=" . $image ."> <IMG border=0 src=showthumb.php?image=" . $image ."></A><td>");
echo "<td valign=top><font size=-1>";
// get file name
echo "File: <b>" . $exif['FILE']['FileName'] . "</b><br/>";
// get timestamp
echo "Timestamp: " . $exif['IFD0']['DateTime'] . "<br/>";
// get image dimensions
echo "Dimensions: " . $exif['COMPUTED']['Width'] . " x " . $exif['COMPUTED']['Height'] . " <br/>";
// get camera make and model
echo "Camera: " . $exif['IFD0']['Model'] . "<br/>";
echo "Exposure Time: " . $exif['EXIF']['ExposureTime'] . "<br/>";
echo "Aperture: " . $exif['COMPUTED']['ApertureFNumber'] . "<br/>";
echo "F Number: " . $exif['EXIF']['FNumber'] . "<br/>";
echo "ISO: " . $exif['EXIF']['ISOSpeedRatings'] . " ";
echo "Flash: " . $exif['EXIF']['Flash'] . "<br/>";
echo "</font></td>";
echo "</tr>";
}
}
closedir($dh);
}
}
?>
</table>
</body>
</html>
Show "built-in" thumbnail, with error check for not available
<?php
if (array_key_exists('file', $_REQUEST)) {
$image = exif_thumbnail($_REQUEST['file'], $width, $height, $type);
} else {
$image = false;
}
if ($image!==false) {
header('Content-type: ' .image_type_to_mime_type($type));
echo $image;
exit;
} else {
// no thumbnail available, handle the error here
echo 'No thumbnail available';
}
?>
See Also
- Automatically organise your digital photography by taking advantage of your cameras built-in metadata and PHP's EXIF functions
- PHP Manual, exif_read_data function
- PHP Manual, exif_thumbnail function
- DreamHost Forum discussion
