This question already has answers here:
Order in conditional statements [duplicate]
(2 answers)
Closed 5 years ago.
What is the difference between the following two statements?
Suppose we have the following variable.
$someVariable = false;
Statements;
if($someVariable === false)
and
if(false === $someVariable)
There is no difference you can use it any way you want.You are just checking/comparing 2 values whether they are equal or not.
In simple words it's just like Is 1+2=3 or 2+1=3??
Related
This question already has answers here:
Check multiple variables (boolean) in PHP
(7 answers)
Bitwise operator of booleans
(6 answers)
Difference between & and && in PHP
(6 answers)
Closed 7 months ago.
As the title, Is the code below, a good practice to check if one of the variables is false?
return $isAdmin * $isLogin * $isConfirmed;
Instead of using if statement that is shown below.
if (!$isAdmin | !$isLogin | !$isConfirmed) {
return false;
}
I'd like to know why if it's not.
This question already has answers here:
PHP: using empty() for empty string?
(4 answers)
should i use empty() php function
(2 answers)
Closed 4 years ago.
Can anyone tell me the different between checking if a variable has value using the empty() function or "truthy" in an if statement? As far as I can tell they achieve the same thing?.. I am writing a function for Wordress that loops through the taxonomies and both work but I am not sure which is best.
$taxonomies = get_taxonomies($args, $output, $operator);
if (!empty($taxonomies)) {
...code here
}
or
$taxonomies = get_taxonomies($args, $output, $operator);
if ($taxonomies) {
...code here
}
This question already has answers here:
Using return in ternary operator
(7 answers)
Closed 5 years ago.
I was recently refactoring. And thought this would awesome. But is not allowed.
<?php
function(){
doSomething() && return true;
}
Because return is a statement and cannot be used as part of an expression. An expression is something that returns/results in a value. return doesn't result in any value, but operands to && must result in a value for the && expression to be evaluable.
This question already has answers here:
Does PHP have short-circuit evaluation?
(8 answers)
Closed 6 years ago.
(PHP)
for example, i have functions,which execute heavy queries and return TRUE or FALSE.
is there any performance difference:
if ( cond1() && cond2() && cond3() && cond4())
or
if (cond1()){
if (cond2()){
}
}
because, in the last case, if cond1() is false, then it doesnt execute the other conditions.. is same for the first example?
No this has no performance differences.
In this example when condition 1 fails, it doesn't execute the second condition
if ( cond1() && cond2() && cond3() && cond4())
This question already has answers here:
How do i make shortcuts for IF statements?
(5 answers)
Closed 8 years ago.
I have a function that checks user permissions and I want it to do this:
if(verify("O") || ("M"))
so that it checks if the user has the permission "O" or "M" but it does not work
You're close. This should work:
if(verify("O") || verify("M"))
If your function verify() only accepts one input. You need to call it again with the second input. Now, if either verify("O") or verify("M") returns true, your IF statement will return true.