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Migrating from PHP 8.0.X to PHP 8.1.X
" Migrating from PHP
8.0xto PHP 81X
Migrating from PHP
74xto PHP 8.0X
Migrating trom PHP
Table of Contents
73xto PHP 7.4X
Migrating trom PHP
New Features
72xto PHP 7.3X
New Classes and Interfaces
Migrating trom PHP
New Functions
71Xto PHP 12X
New Global Constants
Migrating from PHP
Backward Incompatible Changes
Z.0x to PHP 71X
Deprecated Features
Migrating from PHP
Other Changes
5.6xto PHP Z.0X
Migrating from PHP
This new minor version brings with it a number of new features
5.5xto PHP 5.6X
and
few incompatibilities that should be tested for before
Debugging in PHP
switching PHP versions in production environments.
Configure options
php.ini directives
See also the migration guides for PHP versions
72x73x74X
Extension
8.0X.
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71X