phparray.py

import re


odd_backslash = re.compile(r'((?<!\\)(\\\\)*\\(?!\\))')


def php_escape(value):
    try:
        return "'" + odd_backslash.sub(
            r'\\\1', value.replace("'", r"\'")) + "'"
    except AttributeError:
        return str(value)


def to_php(mapping):
    """
    Perform the equivalent of PHP's var_export to a python `dict`.
    NOTE: Does not support nested arrays.
    """
    php = "array (\n"
    for key, value in mapping.iteritems():
        php += '  ' + ' => '.join([
            php_escape(key),
            php_escape(value)
        ]) + ',\n'
    php += ")"
    return php


import unittest

class PHPTests(unittest.TestCase):
    def test(self):
        ONE_PHP = "array (\n  '\\\\1' => '\\\\1',\n)"
        ONE_PYTHON = {r'\1': r'\\1'}
        self.assertEqual(ONE_PHP, to_php(ONE_PYTHON))

        TWO_PHP = "array (\n  0 => 1,\n)"
        TWO_PYTHON = {0: 1}
        self.assertEqual(TWO_PHP, to_php(TWO_PYTHON))