one translations file to include in js or php

language_it.php

<?php
$jlang = <<<EOT
{ 
"cancel":"Cancella",          	
"close": "Chiudi",	
"copy": "Copia",
"delete": "Elimina",
"delete-confirm": "Confermi la cancellazione?",
"deleted": "Cancellato",
"disabled": "Disabilitati",
"done": "Azione compiuta",
"validation": {
	"required": "[%s] è richiesto",
	"email": "[%s] non è un indirizzo email valido",
	"min": "[%s] deve essere di almeno %s caratteri",
  }
}
EOT;

if ( basename(__FILE__) == basename($_SERVER["SCRIPT_FILENAME"]) ) { // called directly: <script src="this_file.php"></script>
	echo "const _e = (path) => path.split('.').reduce((o, p) => o && o[p] ? o[p] : path, $jlang);";
}
else {							// called with include/require from php: include "this_file.php";
	$jlang = json_decode($jlang,true);
	$_e = function($path) use ($jlang) {
		$p = explode('.', $path);
		$out = array_reduce($p, function($carry, $item) use($path){
				return isset($carry) && isset($carry[$item]) ? $carry[$item] : $path ;
			},$jlang);
		return is_scalar($out) ? $out : $path;
	};
}




/**
	_e($path, 1,2,3,4...) => vsprintf("numbers %d,%d,%d",[1,2,3,4])
*/
function _e () {
	$args = func_get_args();
	$path = $args[0];		// il path sempre in prima posizione
	$p = explode('.', $path);
	$out = array_reduce($p, function($carry, $item) use($path){
			return isset($carry) && isset($carry[$item]) ? $carry[$item] : $path ;
		},$GLOBALS['__jlang']);

	return is_scalar($out) ? vsprintf($out,array_merge(array_slice($args,1),array_fill(0,9,''))) : $path;
};