The getImageProperties function in PHP returns an array of property keys available for an image. To get these property values, you use getImageProperty function, giving it one of the available keys provided by the getImageProperties function result. For some images, you may have a lot of properties and for some, you may have few. The two that almost every image seems to have are "date:create" and "date:modify", but some images may have forty or more properties, some titled "exif:Compression", "photoshop:Credit", "jpeg:colorspace", "rdf:Alt", "stRef:documentID", and "xap:CreatorTool." PNG files will also have properties like "png:IHDR.bit_depth" and "png:IHDR.width,height." So far, it appears generally that GIF and BMP files, being simpler, have fewer properties, whereas JPEG and PNG files, being more complicated, have much wider array of properties. It seems incredibly useful in document management.
And now, some sample code and results :
<?php
// Author: holdoffhunger@gmail.com
// Imagick Type
// ---------------------------------------------
$imagick_type = new Imagick();
// Open File
// ---------------------------------------------
$file_to_grab = "image_workshop_directory/test.png";
$file_handle_for_viewing_image_file = fopen($file_to_grab, 'a+');
// Grab File
// ---------------------------------------------
$imagick_type->readImageFile($file_handle_for_viewing_image_file);
// Get Image Properties
// ---------------------------------------------
$imagick_type_properties = $imagick_type->getImageProperties('*', FALSE);
// Print Image Properties
// ---------------------------------------------
print("<pre>");
print_r($imagick_type_properties);
// Print Each Individual, Image Property
// ---------------------------------------------
foreach($imagick_type_properties as $value)
{
print("$value --- ");
print($imagick_type->getImageProperty("$value"));
print("<br><br>");
}
print("</pre>");
?>
Results of this done on a standard PNG image :
Array
(
[0] => date:create
[1] => date:modify
[2] => png:cHRM
[3] => png:gAMA
[4] => png:IHDR.bit_depth
[5] => png:IHDR.color_type
[6] => png:IHDR.interlace_method
[7] => png:IHDR.width,height
[8] => png:sRGB
)
date:create --- 2012-05-19T18:26:45-05:00
date:modify --- 2012-05-19T18:26:45-05:00
png:cHRM --- chunk was found (see Chromaticity, above)
png:gAMA --- gamma=0.45455 (See Gamma, above)
png:IHDR.bit_depth --- 8
png:IHDR.color_type --- 2
png:IHDR.interlace_method --- 0
png:IHDR.width,height --- 320, 320
png:sRGB --- intent=0 (See Rendering intent)
Imagick::getImageProperties
(PECL imagick 2, PECL imagick 3)
Imagick::getImageProperties — 画像のプロパティを返す
説明
関連付けられているプロパティのうち、パターンにマッチするものをすべて返します。
二番目の引数を false にすると、プロパティの名前だけを返します。
このメソッドは、ImageMagick バージョン 6.3.6 以降で Imagick をコンパイルした場合に使用可能です。
パラメータ
-
pattern -
プロパティ名のパターン。
-
include_values -
プロパティ名のみを返すかどうか。
falseの場合は、プロファイル名のみを返します。
戻り値
画像のプロパティあるいはプロパティ名を含む連想配列を返します。
例
例1 Imagick::getImageProperties() の使用法
EXIF 情報を抽出します。
<?php
/* オブジェクトを作成します */
$im = new imagick("/path/to/example.jpg");
/* EXIF 情報を取得します */
$exifArray = $im->getImageProperties("exif:*");
/* EXIF のプロパティをループします */
foreach ($exifArray as $name => $property)
{
echo "{$name} => {$property}<br />\n";
}
?>
add a note
User Contributed Notes 4 notes
holdoffhunger at gmail dot com ¶
12 years ago
benkuhl at gmail dot com ¶
11 years ago
The output of this method on a PDF:
Array
(
[date:create] => 2013-01-24T13:27:37-05:00
[date:modify] => 2013-01-24T13:27:37-05:00
[pdf:HiResBoundingBox] => 1089x396+0+0
[pdf:SpotColor-0] => PANTONE 697 C
[pdf:SpotColor-1] => Black
[pdf:SpotColor-10] => PANTONE 504 M C
[pdf:SpotColor-2] => Strike_Thru
[pdf:SpotColor-3] => PANTONE 7421 C
[pdf:SpotColor-4] => PANTONE 697 C
[pdf:SpotColor-5] => PANTONE 873 C
[pdf:SpotColor-6] => PANTONE 504 M C
[pdf:SpotColor-7] => Die
[pdf:SpotColor-8] => PANTONE 697 C
[pdf:SpotColor-9] => PANTONE 504 M C
[pdf:Version] => PDF-1.5
[signature] => 4d871b27b26537c523326f92454ecb2e19fa9e0e86e2a075f97354ad4f3bf122
)
mhufford ¶
15 years ago
ImageMagick only supports setting a very small number of EXIF properties.
See http://www.imagemagick.org/discourse-server/viewtopic.php?t=14234
www dot query at gmail dot com ¶
13 years ago
To access a photograph's EXIF data an alternative method is the normal PHP Exif function.
<?php
$exif_data = exif_read_data($pic1);
$edate = $exif_data['DateTime'];
?>
See: http://php.net/manual/en/book.exif.php
