How to use imagick in php

Imagick makes image manipulation in PHP extremely easy through an OO interface. Here is a quick example on how to make a thumbnail:

Example #1 Creating a thumbnail in Imagick

header

Using SPL and other OO features supported in Imagick, it can be simple to resize all files in a directory (useful for batch resizing large digital camera images to be web viewable). Here we use resize, as we might want to retain certain meta-data:

Example #2 Make a thumbnail of all JPG files in a directory

$images

This is an example of creating a reflection of an image. The reflection is created by flipping the image and overlaying a gradient on it. Then both, the original image and the reflection is overlayed on a canvas.

Example #3 Creating a reflection of an image

/* Read the image */
$im = new Imagick("test.png");/* Thumbnail the image */
$im->thumbnailImage(200, null);/* Create a border for the image */
$im->borderImage(new ImagickPixel("white"), 5, 5);/* Clone the image and flip it */
$reflection = $im->clone();
$reflection->flipImage();/* Create gradient. It will be overlayed on the reflection */
$gradient = new Imagick();/* Gradient needs to be large enough for the image and the borders */
$gradient->newPseudoImage($reflection->getImageWidth() + 10, $reflection->getImageHeight() + 10, "gradient:transparent-black");/* Composite the gradient on the reflection */
$reflection->compositeImage($gradient, imagick::COMPOSITE_OVER, 0, 0);/* Add some opacity. Requires ImageMagick 6.2.9 or later */
$reflection->setImageOpacity( 0.3 );/* Create an empty canvas */
$canvas = new Imagick();/* Canvas needs to be large enough to hold the both images */
$width = $im->getImageWidth() + 40;
$height = ($im->getImageHeight() * 2) + 30;
$canvas->newImage($width, $height, new ImagickPixel("black"));
$canvas->setImageFormat("png");/* Composite the original image and the reflection on the canvas */
$canvas->compositeImage($im, imagick::COMPOSITE_OVER, 20, 10);
$canvas->compositeImage($reflection, imagick::COMPOSITE_OVER, 20, $im->getImageHeight() + 10);/* Output the image*/
header("Content-Type: image/png");
echo $canvas;
?>

The above example will output something similar to:

This example illustrates how to use fill patterns during drawing.

Example #4 Filling text with gradient

/* Create a new imagick object */
$im = new Imagick();/* Create new image. This will be used as fill pattern */
$im->newPseudoImage(50, 50, "gradient:red-black");/* Create imagickdraw object */
$draw = new ImagickDraw();/* Start a new pattern called "gradient" */
$draw->pushPattern('gradient', 0, 0, 50, 50);/* Composite the gradient on the pattern */
$draw->composite(Imagick::COMPOSITE_OVER, 0, 0, 50, 50, $im);/* Close the pattern */
$draw->popPattern();/* Use the pattern called "gradient" as the fill */
$draw->setFillPatternURL('#gradient');/* Set font size to 52 */
$draw->setFontSize(52);/* Annotate some text */
$draw->annotation(20, 50, "Hello World!");/* Create a new canvas object and a white image */
$canvas = new Imagick();
$canvas->newImage(350, 70, "white");/* Draw the ImagickDraw on to the canvas */
$canvas->drawImage($draw);/* 1px black border around the image */
$canvas->borderImage('black', 1, 1);/* Set the format to PNG */
$canvas->setImageFormat('png');/* Output the image */
header("Content-Type: image/png");
echo $canvas;
?>

The above example will output something similar to:

Working with animated GIF images

Example #5 Read in GIF image and resize all frames

/* Create a new imagick object and read in GIF */
$im = new Imagick("example.gif");/* Resize all frames */
foreach ($im as $frame) {
    /* 50x50 frames */
    $frame->thumbnailImage(50, 50);/* Set the virtual canvas to correct size */
    $frame->setImagePage(50, 50, 0, 0);
}/* Notice writeImages instead of writeImage */
$im->writeImages("example_small.gif", true);
?>

Working with ellipse primitive and custom fonts

Example #6 Create a PHP logo

/* Set width and height in proportion of genuine PHP logo */
$width = 400;
$height = 210;/* Create an Imagick object with transparent canvas */
$img = new Imagick();
$img->newImage($width, $height, new ImagickPixel('transparent'));/* New ImagickDraw instance for ellipse draw */
$draw = new ImagickDraw();
/* Set purple fill color for ellipse */
$draw->setFillColor('#777bb4');
/* Set ellipse dimensions */
$draw->ellipse($width / 2, $height / 2, $width / 2, $height / 2, 0, 360);
/* Draw ellipse onto the canvas */
$img->drawImage($draw);/* Reset fill color from purple to black for text (note: we are reusing ImagickDraw object) */
$draw->setFillColor('black');
/* Set stroke border to white color */
$draw->setStrokeColor('white');
/* Set stroke border thickness */
$draw->setStrokeWidth(2);
/* Set font kerning (negative value means that letters are closer to each other) */
$draw->setTextKerning(-8);
/* Set font and font size used in PHP logo */
$draw->setFont('Handel Gothic.ttf');
$draw->setFontSize(150);
/* Center text horizontally and vertically */
$draw->setGravity(Imagick::GRAVITY_CENTER);/* Add center "php" with Y offset of -10 to canvas (inside ellipse) */
$img->annotateImage($draw, 0, -10, 0, 'php');
$img->setImageFormat('png');/* Set appropriate header for PNG and output the image */
header('Content-Type: image/png');
echo $img;
?>

The above example will output something similar to:

vokseli ¶

8 years ago

Be careful when loading multiple images by passing an array to a new Imagick object. This is from Example #2:

$images

inoshadi at gmail dot com ¶

8 years ago

on Example #3 Creating a reflection of an image
----------------------------------------------------
/* Clone the image and flip it */
$reflection = $im->clone();
$reflection->flipImage();
----------------------------------------------------
it was using the Imagick::clone function

This function has been DEPRECATED as of imagick 3.1.0 in favour of using the clone keyword.

use below code instead:
----------------------------------------------------
/* Clone the image and flip it */
$reflection = clone $im;
$reflection->flipImage();
----------------------------------------------------

http://php.net/manual/en/imagick.clone.php