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Questions tagged [unset]

Removing the value associated with a variable or property from the current environment.

Common usages:

  • Destroying a variable or member of an array in PHP.
  • Removing the value bound to a property in Apache Ant.
  • Removing a variable from the environment of a shell script.
595 questions
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Destroy session, but keep one variable set

I am using session variables to control logins and page access. I use variables to control different user groups that a user belongs to, so I have quite a few session variables. I also use a session variable to remember the users last visited page…
Eds
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How is it possible to access an object's property after it has been destroyed/unset (__destruct() executed)?

TL;DR > echo (new ClassName())->propertyName; Will call the __destruct(), run its code and AFTER THAT successfully retrieve its "propertyName" property (which will be echoed normally). How can it be retrieving a property from a "destroyed" (or…
Fillipe Montenegro
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Unsetting empty array elements

I'm working with $_FILES and sometimes the array has empty array elements due to empty file inputs on my form. I'm trying to unset these elements. I've tried these code snippets: foreach($_FILES['images']['name'] as $image) { if(empty($image)) …
John
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Visual Studio Code PHP Intelephense not hilight probably unset variables

Visual Studio Code PHP Intelephense not hilight probably unset varuables. How enable hilight probably unset varuables? PhpStorm do it. Code: foreach ($paymentCollection as $payment) { if (!$payment->isInner() &&…
websek webseker
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View generation and reserved names in PHP

This is a bit of a peculiar one; I don't think this is in fact possible, however the SO community has surprised me time and time again; so here goes. Given in PHP; I have the following snippet: $path = 'path/to/file.php'; $buffer =…
Dan Lugg
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Remove countries in WooCommerce from an array of defined country codes

I found How to remove specific country in WooCommerce answer code that works for unsetting one country. How can I use it to unset more countries 3-4? This code works to hide US from my geolocation list. I need it to hide a few more countries based…
Radu
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Is it possible to unset a static property in PHP?

I'm trying to use classes with static methods and properties instead of Singletons. Everything was ok until I had to unset a static property, and my PHP 8.0 threw an error. I need this because the property may not be set at some point, for lazy…
Joan Botella
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Questions about php unset function

I am having questions about unset How to unset all variables.should i use unset($var1,$var2,$var3,...) or any other easy method exists ? unseting the variables at the end of functions is good practice?.any difference ! unseting the variable is…
Gowri
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PHP memory question do you need to unset?

What happens if you do not unset an array before the script is done executing? I am running through thousands of CSV files, parsing data for hundreds of thousands of customers into arrays. It works fine for the first 5/6 hours then starts bogging…
Mark
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Using eval() in the code, and how would you avoid it?

In my code, I want to try fetching $_POST or $_GET variables, and unsetting them as soon as they were requested once. This function returns the method used, which is simple enough. Unfortunately I cannot simply return the $_POST or $_GET variables…
Dwarf Vader
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can't drag element that has css property unset: all

It seems I'm not able to drag an element that has unset: all css property. .my-component { all: initial; * { all: unset; } } I use these rules inside a chrome extension, on elements that are being injected in the user browser page (to…
Thomas L'huillier
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PHP - Is there a way to get a variable value if it is set?

I always find myself writing something like: if(isset($var)) { DoSomethingWith($var); } else { DoSomethingWith(null); } or if(isset($arr["key"])) { DoSomethingWith($arr["key"]; } else { DoSomethingWith(null); } My question is…
J. Brown
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how do i unset multiple keys in php

I am getting error while unset the data. Can anyone tell me how to do that. Here i have column array look like:- enter code here Array ( [0] => Id [1] => Name [2] => MainDeity [3] => Description [4] => MainImage [5] => Category [6] => Tehsil [7] =>…
user6384346
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1 answer

unset object inside an array of objects

I have a problem with remove items from an array with object, the same code run in other app. After looping the array $categories should be empty. The code bellow removes all children categories then removes the parent category if the user pass the…
owis sabry
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Reduce an array of objects to the 'best 10'

I have an array of objects, which are Soccer players. The array can contain anything from zero to thousands of players. I want to reduce it to the best 10. My initial attempt was as follows : while (count($ArrayOfPlayers) > 10) { $ArrayIndex =…
Farflame
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