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 — Devuelve las propiedades de la imagen
Descripción
Devuelve todas las propiedades asociadas que coniciden con el patrón. Si se pasa true
como segundo parámetro, sólo se devuelven los nombres de las propiedades. Este método está disponible si Imagick ha sido compilado con la versión 6.3.6 o superior de ImageMagick.
Parámetros
-
pattern -
El patrón para los nombres de las propiedades.
-
only_names -
Si se devuelve sólo los nombres de las propiedades. Si es
falsetambién se devuelven los valores
Valores devueltos
Devuelve un array que contiene las propiedades de la imagen o los nombres de las propiedades.
Ejemplos
Ejemplo #1 Usar Imagick::getImageProperties():
Un ejemplo de extraer la imformación EXIF.
<?php
/* Crear el objeto */
$im = new imagick("/path/to/ejemplo.jpg");
/* Obtener la información EXIF */
$matrizExif = $im->getImageProperties("exif:*");
/* Realizar un bucle a través de las propiedades EXIF */
foreach ($matrizExif as $nombre => $propiedad)
{
echo "{$nombre} => {$propiedad}<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
