Converts JSON to a PHP array literal (short [] or long array() syntax, keys quoted, indented, as a return statement) and parses PHP array literals back to JSON — including array() and [] syntax, => pairs, single- and double-quoted strings with escapes, numbers in every PHP notation, true/false/null, nested arrays, trailing commas and comments (PHP lists become JSON arrays, other arrays become objects). It also encodes JSON as a PHP serialize() string and decodes serialize() strings (arrays, scalars and plain objects, byte-accurate for UTF-8). Nothing is evaluated. Everything runs locally.