PHP Double access utility

gistfile1.md

Double access utility

This is an utility I made to access to common global variables in a mode I prefer: $_GET -> foo against $_GET['foo'].

Where's the utility?

• you can use this function for other variables too
• backward compatibility: array access is allowed too, so $_GET['foo'] is accepted
• integer and float values will be converted from string to their respective values
• usage on inclusion
• prevent not defined cells errors

Globals

When you include this script it will automatically conver arrays in $GLOBALS.

If a variable is not defined you don't have to catch errors because undefined cells will return null.

<?php

// URL is http://hostname/path?lorem=ipsum

$function = require_once 'double_access.php';

var_dump(
    $_GET,
    $_GET -> lorem,
    $_GET['lorem'],
    $_GET['undefined']
);

// object(ArrayObject)[3]
//   public 'lorem' => string 'ipsum' (length=5)
// string 'ipsum' (length=5)
// string 'ipsum' (length=5)
// null

?>

Usage on other variables

<?php

$function = require_once 'double_access.php';

$tmp = array(
    'foo' => array(
        0 => 'bar',
        1 => 5,
        'test' => 6.42,
    ),
);

$function($tmp);

var_dump(
    $tmp['foo'],
    $tmp -> foo,
    $tmp['foo'][0],
    $tmp -> foo[0],
    $tmp -> foo -> test
);

// object(ArrayObject)[1]
//   string 'bar' (length=3)
//   int 5
//   public 'test' => float 6.42
// object(ArrayObject)[1]
//   string 'bar' (length=3)
//   int 5
//   public 'test' => float 6.42
// string 'bar' (length=3)
// string 'bar' (length=3)
// float 6.42

?>

gistfile2.php

<?php

return call_user_func(function ($globals) {
    // real function
    $fn = function (&$data) use (&$fn) {
        // if there's something that isn't an
        // array, it'll not be converted
        if (!is_array($data)) {
            return;
        }

        foreach ($data as $key => $value) {
            // only arrays can be transformed in ArrayObjects
            // the 2nd condition is used to prevent recursion
            // other cases are for objects obviously of
            // another type that will be converted
            if (is_array($value) && $value !== $data) {
                $fn($data[$key]);
            } elseif ($value === (string) intval($value)) {
                $data[$key] = intval($value);
            } elseif ($value === (string) floatval($value)) {
                $data[$key] = floatval($value);
            }
        }

        $data = new ArrayObject($data, 2);
    };

    // initially all the global data
    // will be covnerted
    $fn($globals);

    // returning the closure useful
    // for developers
    return $fn;
}, $GLOBALS);