REF, or r() is a nicer alternative to PHP's print_r / var_dump functions.
- (server) PHP 5.3+ (5.4+ displays additional info)
- (client) Any browser, except IE 8 and lower of course
Copy folder to wp-content/mu-plugins:
Basic example:
// display info about defined classes
r(get_declared_classes());
// display info about global variables
r($GLOBALS);
To print in text mode you can use the rt() function instead:
rt($var);
To terminate the script after the info is dumped, prepend the bitwise NOT operator:
~r($var); // html
~rt($var); // text
Prepending the error control operator (@) will return the information:
$output = @r($var); // html
$output = @rt($var); // text
Keyboard shortcuts (javascript must be enabled):
X- collapses / expands all levelsCtrl+X- toggles display state
To modify the global configuration call ref::config():
// example: initially expand first 3 levels
ref::config('expLvl', 3);
You can also add configuration options in your php.ini file like this:
[ref]
ref.expLvl = 3
ref.maxDepth = 4
Currently available options and their default values:
| Option | Default | Description |
|---|---|---|
'expLvl' |
1 |
Initially expanded levels (for HTML mode only). A negative value will expand all levels |
'maxDepth' |
6 |
Maximum depth (0 to disable); note that disabling it or setting a high value can produce a 100+ MB page when input involves large data |
'showIteratorContents' |
FALSE |
Display iterator data (keys and values) |
'showResourceInfo' |
TRUE |
Display additional information about resources |
'showMethods' |
TRUE |
Display methods and parameter information on objects |
'showPrivateMembers' |
FALSE |
Include private properties and methods |
'showStringMatches' |
TRUE |
Perform and display string matches for dates, files, json strings, serialized data, regex patterns etc. (SLOW) |
'formatters' |
array() |
Custom/external formatters (as associative array: format => className) |
'shortcutFunc' |
array('r', 'rt') |
Shortcut functions used to detect the input expression. If they are namespaced, the namespace must be present as well (methods are not supported) |
'stylePath' |
'{:dir}/ref.css' |
Local path to a custom stylesheet (HTML only); FALSE means that no CSS is included. |
'scriptPath' |
'{:dir}/ref.js' |
Local path to a custom javascript (HTML only); FALSE means no javascript (tooltips / toggle / kbd shortcuts require JS) |
'showUrls' |
FALSE |
Gets information about URLs. Setting to false can improve performance (requires showStringMatches to be TRUE) |
'timeout' |
10 |
Stop execution after this amount of seconds, forcing an incomplete listing. Applies to all calls |
'validHtml' |
FALSE |
For HTML mode only. Whether to produce W3C-valid HTML (larger code output) or unintelligible, potentially browser-incompatible but much smaller code output |
- Inherit DocBlock comments from parent or prototype, if missing
- Refactor "bubbles" (for text-mode)
- Correctly indent multi-line strings (text-mode)
- Move separator tokens to ::before and ::after pseudo-elements (html-mode)