PHP 8.3 is the latest in 2026. 7.4 is outdated — no security updates.
PHP 7.4 — outdated
EOL since 2022. WordPress warns about it.
PHP 8.0 — minimum today
JIT compilation — 10-20% faster. Named args, match expression.
PHP 8.1 — for most
Enum, readonly, fibers. 30% faster than 7.4.
PHP 8.2 — stable
Readonly classes.
PHP 8.3 — latest
Typed class constants.
What to pick
New project — 8.3. WordPress — 8.2.