Imagick::getImageProperties

(PECL imagick 2.0.0)

Imagick::getImageProperties — Returns the image properties

说明

Imagick::getImageProperties ([ string $pattern = "*" [, bool $include_values = TRUE ]] ) : array

Returns all associated properties that match the pattern. If FALSE is passed as second parameter only the property names are returned. 此方法在Imagick基于ImageMagick 6.3.6以上版本编译时可用。

参数

pattern

The pattern for property names.

include_values

Whether to return only property names. If FALSE then only property names will be returned.

返回值

Returns an array containing the image properties or property names.

范例

Example #1 Using Imagick::getImageProperties():

An example of extracting EXIF information.

<?php

/* Create the object */
$im = new imagick("/path/to/example.jpg");

/* Get the EXIF information */
$exifArray = $im->getImageProperties("exif:*");

/* Loop trough the EXIF properties */
foreach ($exifArray as $name => $property)
{
    echo "{$name} => {$property}<br />\n"; 
}

?>

User Contributed Notes

benkuhl at gmail dot com 24-Jan-2013 06:40
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
        )
holdoffhunger at gmail dot com 19-May-2012 11:29
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)
www dot query at gmail dot com 08-Sep-2011 11:58
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
mhufford 03-Aug-2009 02:03
ImageMagick only supports setting a very small number of EXIF properties. 

See http://www.imagemagick.org/discourse-server/viewtopic.php?t=14234