phpython Code

<?php
include_once "../lime/parse_engine.php";
include_once "python.class";
include_once "python-tokenizer.php";

/* Le definizioni lessicali per python
 * http://docs.python.org/reference/lexical_analysis.html
 * usare con cura...
 */

function tokenize($line) {
	// Numbers are tokens, as are all other non-whitespace characters.
	// Note: This isn't a particularly efficent tokenizer, but it gets the
	// job done.
	$out = array();
	while (strlen($line)) {
		$line = trim($line);
		if (preg_match('/^[0-9]+(\.[0-9]*)?/', $line, $regs)) {
			# It's a number
			$out[] = $regs[0];
			$line = substr($line, strlen($regs[0]));
		} else if (preg_match('/^[A-Za-z]+/', $line, $regs)) {
			# It's a variable name
			$out[] = $regs[0];
			$line = substr($line, strlen($regs[0]));
		} else {
			# It's some other character
			$out[] = $line[0];
			$line = substr($line, 1);
		}
	}
	return $out;
}

$symbol_table = array();
function set_variable($v, $e) {
	global $symbol_table;
	$symbol_table[$v] = $e;
}
function get_variable($v) {
	global $symbol_table;
	return doubleval($symbol_table[$v]);
}



// Main function for run pyton code
function python_eval($pycode) {
	global $parser;
	$line = $pycode;
	if (!strlen($line)) return;
	try {
		$parser->reset();
		foreach(tokenize($line) as $t) {
			if (is_numeric($t)) $parser->eat('num', doubleval($t));
			else if (ctype_alpha($t)) $parser->eat('var', $t);
			else $parser->eat("'$t'", null);
		}
		$parser->eat_eof();
	} catch (parse_error $e) {
		echo $e->getMessage(), "\n";
	}
}

// Main parser object