exif_tagname

(PHP 4 >= 4.2.0, PHP 5)

exif_tagname — Lit le nom d'en-tête EXIF d'un index

Description

string exif_tagname ( int $index )

Liste de paramètres

index: L'id de Tag pour lequel un nom sera recherché.

Valeurs de retour

exif_tagname() retourne FALSE si index n'est pas un id de tag EXIF défini, sinon elle retourne le nom de l'en-tête.

Exemples

Exemple #1 Exemple pour exif_tagname()


<?php
echo "256: ".exif_tagname(256).PHP_EOL;
echo "257: ".exif_tagname(257).PHP_EOL;
?>

L'exemple ci-dessus va afficher :

256: ImageWidth
257: ImageLength

Voir aussi

exif_imagetype() - Détermine le type d'une image
» EXIF Specification
» EXIF Tags

exif_thumbnail

exif_read_data

[edit] Last updated: Fri, 25 May 2012

add a note User Contributed Notes exif_tagname

abc at ed48 dot com 22-Jun-2011 10:03


In association with exif_read_data:



<?php



# The tagnames can vary in different cameras



$imgdir = "/path_to_img/";

$img_file = "image_file.jpg";



echo $img_file . "&nbsp;&nbsp;&nbsp;<sub>TEST</sub>

<br />";

echo '<img src="' . $imgdir . $img_file . '" alt="'

 . $img_file . '" title="' . $img_file . '" width="400" /><br /><br />';



$xf_data = exif_read_data($imgdir . $img_file);



$tagg = exif_tagname(0X10F);

echo '<br>' . $tagg .  ' >>> ' . $xf_data[$tagg];

$tagg = exif_tagname(0X110);

echo '<br>' . $tagg .  ' >>> ' . $xf_data[$tagg];

$tagg = exif_tagname(0X132);

echo '<br>' . $tagg .  ' >>> ' . $xf_data[$tagg];

$tagg = exif_tagname(0XA002);

echo '<br>' . $tagg .  ' >>> ' . $xf_data[$tagg] . 'px';

$tagg = exif_tagname(0XA003);

echo '<br>' . $tagg .  ' >>> ' . $xf_data[$tagg] . 'px';



?>

abc at ed48 dot com 21-Jun-2011 01:20


Theoretically, 65,535 tags are possible. Although not all are used, yet. The code below lists these tags:



<?php



for ($id = 1; $id <= 65535; $id++)

{

$dec2hex = dechex($id);



$strgx = '0x'. $dec2hex;



if(exif_tagname($strgx) != "")

{

echo $strgx . ' ( ' . exif_tagname($strgx) . ' )<br />';

}

}



?>

djmaze@moocms 22-Feb-2008 05:23


Usage: exif_tagname(0x5001)



A list of all supported index numbers is in the exif.c: tag_table_IFD



http://cvs.php.net/viewvc.cgi/php-src/ext/exif/exif.c?view=markup



As you can see, it doesn't support them all!

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