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How to: Not use eval to create array? 1

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thenewa2x

thenewa2x

Programmer
Dec 10, 2002
349
US
Here's my problem: I dont want to use eval. The script works and you can view it on a web-page if you need to.

Code: 
<?php

    $array = array(
    
      'LEVEL_1' => array(
    
        'LEVEL_2_1' => array(),
        'LEVEL_2_2' => array(),
        'LEVEL_2_3' => array(),
    
      ),
    
      'LEVEL_2' => array(
    
        'LEVEL_2_1' => array(),
        'LEVEL_2_2' => array(),
        'LEVEL_2_3' => array(),
    
      ),
    
      'LEVEL_3' => array(
    
        'LEVEL_3_1' => array(),
        'LEVEL_3_2' => array(),
        'LEVEL_3_3' => array(),
    
      ),
    
    );
    
    $shortcut =& get_array('/LEVEL_2/LEVEL_2_2/', &$array);
    
    $shortcut['TEST'] = 'Value 2';
    
    print('<pre>');
    print_r($array);
    
    function get_array ( $path, &$array )
    {
      $path      = explode('/', $path);
    
      array_shift($path);
      array_pop($path);
    
      
      $real_path = eval("return(\$array['" . join("']['", $path) . "']);");
    
      return( $real_path );
    }

?>

---------------------------------------
 
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How about using the following instead of your eval:
Code: 
$real_path = $array[$path[0]][$path[1]];

It worked when I tried it.

Ken
 
Upvote 0 Downvote
Thanks but it works half-way. What if the path is longer?

[tt]/path/to/some/indice/in/the/array/[/tt]

or

[tt]/some/really/long/path/to/the/indice/in/the/array/[/tt]

---------------------------------------
 
Upvote 0 Downvote
On my PHP5 machine, the following code:
Code: 
<?php

$array = array(

	'LEVEL_1' => array(

		'LEVEL_2_1' => array(),
		'LEVEL_2_2' => array(),
		'LEVEL_2_3' => array(),

  	),

	'LEVEL_2' => array(

		'LEVEL_2_1' => array(),
		'LEVEL_2_2' => array(),
		'LEVEL_2_3' => array(
			'LEVEL_2_3_1' => array ()
		),

	),

	'LEVEL_3' => array(

		'LEVEL_3_1' => array(),
		'LEVEL_3_2' => array(),
		'LEVEL_3_3' => array(),

	),

);

print '<html><body><pre>' ;

$shortcut =& get_array('/LEVEL_2/LEVEL_2_2/', $array);

$shortcut['TEST1'] = 'Value 1';

$shortcut =& get_array('/LEVEL_2/LEVEL_2_3/LEVEL_2_3_1', $array);
$shortcut['TEST2'] = 'Value 2';

print_r ($array);
print '</pre></body></html>';

function &get_array ( $path, &$array )
{
	$path = explode('/', $path);

	$current = &$array;
	foreach ($path as $path_element)
	{
		if ($path_element != '')
		{
			$current = &$current[$path_element];
		}
	}
      
	return ($current);

}

?>

Returns:

Code: 
Array
(
    [LEVEL_1] => Array
        (
            [LEVEL_2_1] => Array
                (
                )

            [LEVEL_2_2] => Array
                (
                )

            [LEVEL_2_3] => Array
                (
                )

        )

    [LEVEL_2] => Array
        (
            [LEVEL_2_1] => Array
                (
                )

            [LEVEL_2_2] => Array
                (
                    [TEST1] => Value 1
                )

            [LEVEL_2_3] => Array
                (
                    [LEVEL_2_3_1] => Array
                        (
                            [TEST2] => Value 2
                        )

                )

        )

    [LEVEL_3] => Array
        (
            [LEVEL_3_1] => Array
                (
                )

            [LEVEL_3_2] => Array
                (
                )

            [LEVEL_3_3] => Array
                (
                )

        )

)

Which is what I think you want.


Want the best answers? Ask the best questions!

TANSTAAFL!!
 
Upvote 0 Downvote
It works! My question then becomes, why? If it can find the key in the first level does it recurse until it find a match or the end of the array?

Thanks anyway. Two bad I can't give you two stars.

---------------------------------------
 
Upvote 0 Downvote
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