const engine = require('php-parser');
const unparse = require('php-unparser');
const code = (`
<?php require("./script.php")?>
<html>
<body>
<h1>Body</h1>
</body>
</html>
`);
const scriptCode = `<? $name = "foo";
?>
`;
var parser = new engine();
var codeAST = parser.parseCode(code);
var scriptAST = parser.parseCode(scriptCode);
var inlineIdx = codeAST.children.findIndex((e) => e.kind === 'include');
codeAST.children.splice(inlineIdx, 1, ...scriptAST.children);
unparse(codeAST, {kind: 'program'});