ImageMagick Installed, True or False, How to Check? PHP

Question

I have to run a function that has an option to use GD or ImageMagick - what is the best way (php) to test if ImageMagick is installed, and return a true or false?

Answer 1

Use an if condition with extension_loaded() function to check whether you have the extension is loaded

if(extension_loaded('imagick')) {
    echo 'Imagick Loaded';
}

Documentation

Answer 2

Just create an if condition checking for installed extension

if (!extension_loaded('imagick')) 
{
    echo 'imagick not installed';
}
else 
{
    echo 'imagick installed'; 
}