isset Questions
2
Solved
Is there a shorthand way to assign a variable to something if it doesn't exist in PHP?
if(!isset($var) {
$var = "";
}
I'd like to do something like
$var = $var | "";
6
Solved
I am trying to understand the difference between this:
if (isset($_POST['Submit'])) {
//do something
}
and
if ($_POST['Submit']) {
//do something
}
It seems to me that if the $_POST['Subm...
Pastorate asked 17/3, 2010 at 6:36
2
Solved
How to check if array variable
$a = array('a'=>1, 'c'=>null);
is set and is null.
function check($array, $key)
{
if (isset($array[$key])) {
if (is_null($array[$key])) {
echo $key . ' i...
2
Solved
How to check if a multidimensional array item is set in JS?
w[1][2] = new Array;
w[1][2][1] = new Array;
w[1][2][1][1] = 10; w[1][2][1][2] = 20; w[1][2][1][4] = 30;
How to check if w[1][2][1][3]...
Haydeehayden asked 2/6, 2013 at 14:2
5
Solved
class a {
function __get($property){...}
}
$obj = new a();
var_dump(isset($obj->newproperty));
Seems the answer is nope but why?
2
Solved
Possible Duplicate:
Any more concise way to set default values?
Is there a built-in php function like the following:
function isset_get($array, $key, $default = null) {
return isset...
5
Solved
For example, if I implement some simple object caching, which method is faster?
1. return isset($cache[$cls]) ? $cache[$cls] : $cache[$cls] = new $cls;
2. return @$cache[$cls] ?: $cache[$cls] = n...
3
Solved
I've noticed that frequently people simply write
<?php if($_SESSION['username']) {...} ?>
while I have been using:
<?php if(isset($_SESSION['username'])) {...} ?>
Could someone...
Laurice asked 7/5, 2012 at 23:50
7
Solved
I know this is a dumb question and I guess it must have been asked before. However I am unable to find an answer to my question.
Here is some sample code (which of course does not compile) to outl...
2
Solved
I have some strange issue with isset() function in PHP.
Let me show... .
<?php
$aTestArray = array(
'index' => array(
'index' => 'Główna'
),
'dodaj' => 'Dodaj ogłoszenie',
);
var...
8
Solved
I'm trying to check that user's submitted data, from $_POST, has at least the same elements that my passed array has. I'm doing it because I will use those elements later by calling $_POST['element...
2
Solved
$a = NULL;
$c = 1;
var_dump(isset($a)); // bool(false)
var_dump(isset($b)); // bool(false)
var_dump(isset($c)); // bool(true)
How can I distinguish $a, which exists but has a value of NULL, from ...
2
Solved
class A {
public static $foo = 42;
}
$class = 'A';
$attribute = 'foo';
var_dump(isset($class::$attribute)); //gives bool(false)
How can i checkt, of this static attribute exists in this class?...
Podite asked 24/4, 2011 at 16:37
3
Solved
I have a simple associative array.
$a = array("a"=>"b", "c"=>"d");
I want to check if the key "1" exists in the array, e.g.
isset($a["1"]);
This string is being treated as an integer, s...
Procedure asked 9/1, 2011 at 4:27
2
Solved
Is there a way to check if an object has any fields? For example, I have a soap server I am querying using a soap client and if I call a get method, I am either returned an object containing fields...
2
Solved
How do you test to see if sessions are on. This is not the way...
session_start();
if(isset($_SESSION)) {
echo "sessions ON<br>";
}
else{
echo "sessions OFF<br>";
}
session_destroy(...
1
Solved
I have an upload form with a file to be uploaded. The issue I have is that even when no file is uploaded the if(isset($_FILES)) OR if(!empty($_FILES)) still passes as successful:
$_FILES = $HTTP_P...
Rox asked 30/3, 2010 at 22:2
5
Solved
Is there any speed difference between
if (isset($_POST['var']))
or
if ($_POST['var'])
And which is better or are they the same?
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