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php-esp32 is the firmware that brings real PHP to the ESP32 family. It cross-compiles the unmodified PHP/Zend engine from php.net for the microcontroller — not a subset, not a reimplementation — so your index.php executes bare-metal on the chip. It runs today on the ESP32‑P4 (RISC‑V) and ESP32‑S3 (Xtensa), in an Arduino-style init-loop or as an HTTP web server.

The command-line front end for php-esp32 - a single static binary that scaffolds, builds, flashes and monitors your bare-metal PHP project and identifies the connected board. It hard-codes no hardware: boards, chip families and build options are read from the firmware, so it grows with the port. ESP32 today.