Get Array Values Recursively with PHP
I've been helping to write a WordPress plugin (I'm not ready to share it yet) and one of the tasks required is validating an array of user-selected values against a list of known valid values. The known valid array is actually a key=>value array so unfortunately array_values wont help get the simple list I'd like.
Instead a more advanced custom function was needed:
// http://php.net/manual/en/function.array-values.php
function array_values_recursive($array) {
$flat = array();
foreach($array as $value) {
if (is_array($value)) {
$flat = array_merge($flat, array_values_recursive($value));
}
else {
$flat[] = $value;
}
}
return $flat;
}
This recursive function dives into arrays, even key=>value arrays, to retrieve the final list of values. Thank you PHP.net!
![LightFace: Facebook Lightbox for MooTools]()
One of the web components I've always loved has been Facebook's modal dialog. This "lightbox" isn't like others: no dark overlay, no obnoxious animating to size, and it doesn't try to do "too much." With Facebook's dialog in mind, I've created LightFace: a Facebook lightbox...
![Write Better JavaScript with Promises]()
You've probably heard the talk around the water cooler about how promises are the future. All of the cool kids are using them, but you don't see what makes them so special. Can't you just use a callback? What's the big deal? In this article, we'll...
![Duplicate the jQuery Homepage Tooltips]()
The jQuery homepage has a pretty suave tooltip-like effect as seen below:
The amount of jQuery required to duplicate this effect is next to nothing; in fact, there's more CSS than there is jQuery code! Let's explore how we can duplicate jQuery's tooltip effect.
The HTML
The overall...
![Dijit’s TabContainer Layout: Easy Tabbed Content]()
One of Dojo's major advantages over other JavaScript toolkits is its Dijit library. Dijit is a UI framework comprised of JavaScript widget classes, CSS files, and HTML templates. One very useful layout class is the TabContainer. TabContainer allows you to quickly create a tabbed content...
No need to create a new array, just use iterators. There is an interface for iterators with values that can be iterators called RecursiveIterator. To wrap a nested array there is RecursiveArrayIterator. And to flatten an RecursiveIterator you can use RecursiveIteratorIterator, which by default only returns the leaves.
$it = new RecursiveIteratorIterator(new RecursiveArrayIterator($array)); foreach ($it as $k => $v) { var_dump("$k = $v"); }If you want to convert it to an array use iterator_to_array():
Although if you’re going to call
iterator_to_array()I think you’ve defeated your stated purpose for using iterators.I just love this blog, I always get to know something new. I didn’t know about this. Very useful!
function flatten_array($arg) { return is_array($arg) ? array_reduce($arg, function ($c, $a) { return array_merge($c, flatten_array($a)); },[]) : [$arg]; }