©
이 문서에서는 PHP 중국어 웹사이트 매뉴얼 풀어 주다
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
exif_tagname — 获取指定索引的头名称
$index
)
index
要查找的标签名称的 ID。
返回头名称。
如果 index
参数不是预定义的 EXIF 标签 id,则返回 FALSE
Example #1 exif_tagname() 函数例程
<?php
echo "256: " . exif_tagname ( 256 ). PHP_EOL ;
echo "257: " . exif_tagname ( 257 ). PHP_EOL ;
?>
以上例程会输出:
256: ImageWidth 257: ImageLength
[#1] abc at ed48 dot com [2011-06-22 10:03:02]
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 . " <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';
?>
[#2] abc at ed48 dot com [2011-06-21 13:20:50]
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 />';
}
}
?>