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ImageMagick

ImageMagick is an external program that can be called from php and in the following pages you can find some examples, tips and tricks on how to use it with php.

There are APIs to use ImageMagick but I tend to use the php exec() function along with the command line method as I find it gives more flexibility and uses the full range of options.

I have also included a few examples of the GD library that is built into php and one of the php APIs called Imagick which is also built into the later versions of php.

Do not confuse Imagick with ImageMagick !

ImageMagick version 7

Imagemagick version 7 is basically the same as version 6 but it has a few differences:

• You can call still use convert if the option for legacy was selected on install but the new way to call the program is magick.
  If you use convert it uses the old options etc. You may need to use magick convert rather than just convert
• You can use fx calculations within the command rather than using them separately to populate variables.
  magick input.jpg -resize x"%[fx:h/2]" output.jpg
• It may be integrated into php like GD so will be securer and faster
• The HDRI option is now set by default
• There are other changes and they can be checked out on this Imagemagickchanges page