exif_tagname

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

exif_tagname — 获取指定索引的头名称

说明

exif_tagname(int $index): string

参数

index: 要查找的标签名称的 ID。

返回值

返回头名称。如果 index 参数不是预定义的 EXIF 标签 id，则返回 false

范例

示例 #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

参见

exif_imagetype() - 判断一个图像的类型
» EXIF 规范
» EXIF 标签

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User Contributed Notes 2 notes

down

abc at ed48 dot com ¶

10 years ago


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';

?>

down

abc at ed48 dot com ¶

11 years ago


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 />';
}
}

?>

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