What PHP 8.2 changes for WordPress plugins

These are the functions, constants and settings that PHP 8.2 removes, deprecates or no longer ships, with what to use instead. A removed function or constant stops a plugin with a fatal error when that code runs. A deprecated one keeps working and logs a notice.

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Deprecated

utf8_encode(), utf8_decode(). Use mb_convert_encoding() with ISO-8859-1.

Bumpcheck also checks syntax changes, such as array offsets with curly braces and constructors named after their class. The full list is on the plugin page.