Requirements

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The server requirements for Craft Commerce are the same as Craft 3.5 (opens new window) as well as PHP’s SOAP extension (opens new window).

PHP Package Dependencies

Craft Commerce uses the following PHP packages. Please see their documentation for any additional requirements.

• craftcms/cms (opens new window) ^3.5.4
• dompdf/dompdf (opens new window) ~0.8.3 (recommends GD and IMagick)*
• moneyphp/money (opens new window) ^3.2.1
• ibericode/vat (opens new window) ^1.1.2

Dompdf

In strictly following Craft’s server requirements, Commerce requires a version of Dompdf that’s compatible with PHP 7.0 but results in errors with PHP 7.4.

You can resolve by updating your project’s composer.json platform requirement to PHP 7.1 or greater:

// ...
"config": {
  "optimize-autoloader": true,
  "platform": {
    "php": "7.1"
  }
}
// ...

Running composer update will install Dompdf 0.8.4+.