GDImage

An image editing package using PHP's GD library.

Installation

Open a command console, enter your project directory and execute the following command to download the latest stable version of this bundle:

$ composer require sbolch/gd-image

This command requires you to have Composer installed globally, as explained in the installation chapter of the Composer documentation.

Usage

Image Converter

<?php
  // ...
  use sbolch\GDImage\Converter;
  // ...
  class Demo {
    public function demo() {
      $img = 'path/to/image.png';

      $converter = new Converter();
      $converter
        ->image($img)
        ->toJpg()
        ->target('path/to/converted-image.jpg')
        ->save();
    }
  }

Available functions

• image ( string | GdImage $image ) : self

  Set source image from file path or image resource

• target ( string $path ) : self

  Set target path

• quality ( int quality ) : self

  Set output quality - accepted value is a percentage

• background ( int red, int green, int blue ) : self

  Set background color instead of transparency - accepted values are integers between 0 and 255

• toAvif() | toBmp() | toGif() | toJpg() | toJpeg() | toPng() | toWebp() : self

  Set output format

• save() : string

  Save generated image

• output() : void

  Print image to PHP output

Image Sizer

<?php
  // ...
  use sbolch\GDImage\Sizer;
  // ...
  class Demo {
    public function demo() {
      $img = 'path/to/image.jpg';

      $sizer = new Sizer();
      $sizer
        ->image($img)
        ->thumbnail(400, 300)
        ->save();
    }
  }

Available functions

See available functions at Converter, all of them are available here, too

• image ( string | GdImage $image ) : self

  Set source image from file path or image resource

• instance(): GdImage

  Return current image resource

• widen ( int $width ) : self

  Set the image to the given width while preserving its ratio

• heighten ( int $height ) : self

  Set the image to the given height while preserving its ratio

• maximize ( int $width, int $height ) : self

  Maximize image's size by its longer dimension while preserving its ratio

• crop ( int $width, int $height [, int $x [, int $y]] ) : self

  Crop picture to given dimensions starting at the given position

• thumbnail ( int $width, int $height ) : self

  Make a thumbnail by cropping the image by its shorter dimension (centered crop)

Cached Image Sizer

Same as Image Sizer but it uses cache.

<?php
  // ...
  use sbolch\GDImage\CachedSizer;
  // ...
  class Demo {
    public function demo() {
      $img = 'path/to/image.jpg';

      $sizer = new CachedSizer();
      $sizer
        ->image($img)
        ->thumbnail(400, 300)
        ->save();
    }
  }

Twig integration

If you use Twig, you can include the extensions

• sbolch\GDImage\Twig\ConverterExtension([string $docroot])
• sbolch\GDImage\Twig\SizerExtension([string $docroot [, string $cacheDir]])

You can override the default PHP document root with the optional $docroot parameter for both extensions.

You can use the cache mechanism in SizerExtension by using the optional $cacheDir parameter with your desired cache folder.

Then you can use the below filters (question mark marks optional parameters)

{# Converting image and returning its new path via sbolch\GDImage\Twig\ConverterExtension #}
{{ 'path/to/image'|convert_to_avif(?targetPath, ?quality) }}
{{ 'path/to/image'|convert_to_bmp(?targetPath, ?quality) }}
{{ 'path/to/image'|convert_to_gif(?targetPath, ?quality) }}
{{ 'path/to/image'|convert_to_jpg(?targetPath, ?quality) }}
{{ 'path/to/image'|convert_to_jpeg(?targetPath, ?quality) }}
{{ 'path/to/image'|convert_to_png(?targetPath, ?quality) }}
{{ 'path/to/image'|convert_to_webp(?targetPath, ?quality) }}

{# Resizing image and returning its new path via sbolch\GDImage\Twig\SizerExtension #}
{{ 'path/to/image'|widen(width, ?outputFormat, ?targetPath) }}
{{ 'path/to/image'|heighten(height, ?outputFormat, ?targetPath) }}
{{ 'path/to/image'|maximize(width, height, ?outputFormat, ?targetPath) }}
{{ 'path/to/image'|thumbnail(width, height, ?outputFormat, ?targetPath) }}

Phar mode (only Converter yet)

You can download the phar file on the releases page and use it as below:

php converter.phar -i /path/to/image -f jpg

• -i (--input) : Input file
• -o (--output) : Output file (optional - you must use -o or -f)
• -f (--format) : Output format (optional - you must use -o or -f)
• -q (--quality): Encoding quality as percentage (optional)