Phasm

A PHP to WebAssembly WAT compiler.

This is for demonstration purposes only. Only a small subset of php is supported.

Example

Example php code:

<?php

#[WasmImport(['console', 'log'])]
function logSum(int $value): void {}

#[WasmStart]
function main(): void
{
    $a = 10;
    $b = 100;
    $c = $a + $b;
    logSum($c);
}

Output WAT code:

(module 
    (import "console" "log" (func $logSum (param i64)))
    (func $main 
        (local $a i64)
        (local $b i64) 
        (local $c i64)
        (local.set $a (i64.const 10)) 
        (local.set $b (i64.const 100))
        (local.set $c (i64.add (local.get $a) (local.get $b)))
        (local.get $c)
        (call $logSum)
    ) 
    (start $main)
)

Copy the code above and paste it here: https://developer.mozilla.org/en-US/docs/WebAssembly/Reference/Variables/Local#try_it

How to use

To compile your source code, use this command:

./bin/phasm <file> <output>

Supported features

• Only int (i64) and float (f64) types are supported.
• Math + - * / operations are supported
• Variable declarations
• Function declarations (No return value supported yet)
• Import instruction with #[WasmImport] Attribute
• Start function instruction with #[WasmStart] Attribute
• Export functions (export "foo1")
• Support function return types (result i32)
• Support function parameters

Future

• Boolean expressions
• Strings
• For loops
• While loops
• if, else if, and else statements
• class with properties (simple struct)
• class with methods (enhanced structs)
• inheritance