php how to represent a multilevel array in a string form

Question

This is an example of a mixed, multi-level, irregular array in php:

$settings['style_formats'] = array(
  array('title' => 'Center table', 'selector' => 'table', 'styles' => array('margin-left' => 'auto', 'margin-right' => 'auto')),
  array('title' => 'Menu style', 'selector' => 'ul,ol', 'classes' => 'menu'),
  array('title' => 'Layer2', 'inline' => 'div', 'styles' => array('background-color' => 'orange')),
  array('title' => 'Bold text', 'inline' => 'b'),
  array('title' => 'Red text', 'inline' => 'span', 'styles' => array('color' => '#ff0000')),
  array('title' => 'Red header', 'block' => 'h1', 'styles' => array('color' => '#ff0000')),
  array('title' => 'Example 1', 'inline' => 'span', 'classes' => 'example1'),
  array('title' => 'Example 2', 'inline' => 'span', 'classes' => 'example2'),
  array('title' => 'Table styles'),
  array('title' => 'Table row 1', 'selector' => 'tr', 'classes' => 'tablerow1'),
);

I need to find a method to represent and translate this kind of array from string format to php array. The initial string format must be readable and writeable by a human using a text editor. So e.g. it should not be a result of using "serialize", because "serialize" is a php function (and rather not possible to create by a human) and the string must be possible to create manually in a text editor.

The string will be passed as parameter to a function which will translate it to a php array like the one above.

If it was a simple array, I would use a comma separated string and "explode". But it is multilevel, so using "explode" won't work as it will split internal arrays. preg_split also doesn't look promising because the array is very irregular.

Any ideas how to do it?

@BrendonCheves: I disagree, JSON isn't exactly human friendly if you consider (lack of) whitespace, Unicode, escape sequences, braces... — Alix Axel, Apr 11 '12 at 23:05

score 2 · Answer 1 · answered Apr 11 '12 at 17:33

How about trying to translate this into an xml document, would be human and machine readable both?

There are many php libraries to do so and read the xml file into php array...

For a primer

http://www.phpbuilder.com/columns/adam_delves20060206.php3

http://www.php.net/manual/en/book.simplexml.php

score 1 · Accepted Answer · answered Apr 11 '12 at 17:39

JSON is one of many solutions, like so: (forgive me for no formatting)

{"style_formats":[{"title":"Center table","selector":"table","styles":{"margin-left":"auto","margin-right":"auto"}},{"title":"Menu style","selector":"ul,ol","classes":"menu"},{"title":"Layer2","inline":"div","styles":{"background-color":"orange"}},{"title":"Bold text","inline":"b"},{"title":"Red text","inline":"span","styles":{"color":"#ff0000"}},{"title":"Red header","block":"h1","styles":{"color":"#ff0000"}},{"title":"Example 1","inline":"span","classes":"example1"},{"title":"Example 2","inline":"span","classes":"example2"},{"title":"Table styles"},{"title":"Table row 1","selector":"tr","classes":"tablerow1"}]}

JSON works best in my case. The notation is very similar to native php associative array notation (for me it's a plus). Also, as opposite to simplexml, it requires exactly 1 line of code, while importing xml to nested assoc array required some custom code like [this](http://stackoverflow.com/a/6237999/523972). JSON ignores whitespace as well (good for human input) Oh, and I have no problem with Unicode either. — camcam, Apr 12 '12 at 09:44

Alix Axel · Answer 3 · 2012-04-11T17:54:27.947

1

If this is to be written by humans, YAML might be your best bet.

There are a few PHP implementations available.

edited Apr 11 '12 at 17:54

answered Apr 11 '12 at 17:49

Alix Axel

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php how to represent a multilevel array in a string form

3 Answers3