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Migrating from PHP 7.4.x to PHP 8.0.x

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This new major version brings with it a number of new features and some incompatibilities that should be tested for before switching PHP versions in production environments.

Seealso 7.0.x, 7.1.x, 7.2.x, 7.3.x. 7.4.x.

New-features New-classes Incompatible Deprecated Other-changes

In this section

Backward Incompatible Changes

Non-strict comparisons between numbers and non-numeric strings now work by casting the num...

Deprecated Features

If a parameter with a default value is followed by a required parameter, the default value...

New Classes and Interfaces

CurlHandle

New Features

Support for Named Arguments has been added.

Other Changes

The PHP module has been renamed from php7_module to php_module.

Source: appendices/migration80.xml · from the official PHP manual (php/doc-en)