Any PHP function that will strip properties of an object that are null?

I am returning a json_encode() of an array of objects pulled from an ORM. It includes lots of properties with a null value. What is the neatest way to remove these properties that are null? I guess I could iterate over the properties, look if they are null and then unset() that property, but surely there must be a more elegant way?


Try this; it will only work on a simple object, but if it's coming from an ORM it should be simple enough.

// Strips any false-y values
$object = (object) array_filter((array) $object);

Thanks to Gordon's answer to another question yesterday for giving me the idea.

This works by

  • converting the object to an associative array, where object properties are the keys and their values are the array values
  • using array_filter with default arguments to remove array entries with a false (e.g. empty, or null) values
  • converting the new array back to a simple object

Note that this will remove all properties with empty values, including empty strings, false boolean values and 0s, not just nulls; you can change the array_filter call if you want to keep those and only remote those that are exactly null.

// Strips only null values
$object = (object) array_filter((array) $object, function ($val) {
    return !is_null($val);

Need Your Help

Unable to build my code using Microsoft Visual Studio 2010

c++ c visual-studio-2010

I'm using Microsoft Visual Studio 2010. It was going fine until this morning when I try to build my code. It gave me this weird error:

Introduction to 3D Graphics Programming

iphone opengl-es 3d

I'm a self-taught programmer with absolutely nil 3D programming experience.

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