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!
![Facebook Open Graph META Tags]()
It's no secret that Facebook has become a major traffic driver for all types of websites. Nowadays even large corporations steer consumers toward their Facebook pages instead of the corporate websites directly. And of course there are Facebook "Like" and "Recommend" widgets on every website. One...
![Responsive Images: The Ultimate Guide]()
Chances are that any Web designers using our Ghostlab browser testing app, which allows seamless testing across all devices simultaneously, will have worked with responsive design in some shape or form. And as today's websites and devices become ever more varied, a plethora of responsive images...
![Drag & Drop Elements to the Trash with MooTools 1.2]()
Everyone loves dragging garbage files from their desktop into their trash can. There's a certain amount of irony in doing something on your computer that you also do in real life. It's also a quick way to get rid of things. That's...
![DWRequest: MooTools 1.2 AJAX Listener & Message Display]()
Though MooTools 1.2 is in its second beta stage, its basic syntax and theory changes have been hashed out. The JavaScript library continues to improve and become more flexible.
Fellow DZone Zone Leader Boyan Kostadinov wrote a very useful article detailing how you can add a...
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.
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!