What is isset ($_ get in php?
I am looking to expand on my PHP knowledge, and I came across something I am not sure what it is or how to even search for it. I am looking at php.net isset code, and I see Show I understand normal isset operations, such as asked Aug 25, 2012 at 23:17
2 It's commonly referred to as 'shorthand' or the Ternary Operator.
means
To break it down:
Or...
answered Aug 25, 2012 at 23:29
uınbɐɥsuınbɐɥs 7,0485 gold badges25 silver badges42 bronze badges 1 In PHP 7 you can write it even shorter:
This means that the See all new features of PHP 7.
answered Jul 25, 2016 at 12:11
George GGeorge G 7,12412 gold badges42 silver badges57 bronze badges That's called a ternary operator and it's mainly used in place of an if-else statement. In the example you gave it can be used to retrieve a value from an array given isset returns true
is equivalent to
echo $test; Of course it's not much use unless you assign it to something, and possibly even assign a default value for a user submitted value.
answered Aug 25, 2012 at 23:21
sciritaisciritai 3,6381 gold badge16 silver badges22 bronze badges You have encountered the ternary operator. It's purpose is that of a basic if-else statement. The following pieces of code do the same thing. Ternary:
If-else:
answered Aug 25, 2012 at 23:23
FThompsonFThompson 27.9k11 gold badges55 silver badges91 bronze badges answered Aug 25, 2012 at 23:21
? is called Ternary (conditional) operator : example answered Aug 25, 2012 at 23:21
Nikola NinkovicNikola Ninkovic 1,2521 gold badge12 silver badges26 bronze badges What you're looking at is called a
Ternary Operator, and you can find the PHP implementation here. It's an
answered Aug 25, 2012 at 23:26
bmorenatebmorenate 9551 gold badge8 silver badges18 bronze badges If you want an empty string default then a preferred way is one of these (depending on your need):
If the url parameter
and your variable
Cases to consider:
Why this is a preferred approach:
Update Strict mode may require something like this:
answered Apr 1, 2017 at 4:28
TrophyGeekTrophyGeek 5,6542 gold badges34 silver badges31 bronze badges Not the answer you're looking for? Browse other questions tagged php isset or ask your own question.What is if isset ($_ POST submit )) in PHP?isset( $_POST['submit'] ) : This line checks if the form is submitted using the isset() function, but works only if the form input type submit has a name attribute (name=”submit”).
What is $_ GET in PHP?PHP $_GET is a PHP super global variable which is used to collect form data after submitting an HTML form with method="get". $_GET can also collect data sent in the URL. Assume we have an HTML page that contains a hyperlink with parameters:
Why Isset is used in PHP?The isset function in PHP is used to determine whether a variable is set or not. A variable is considered as a set variable if it has a value other than NULL. In other words, you can also say that the isset function is used to determine whether you have used a variable in your code or not before.
What is Isset post?The isset() function checks if the argument variable exists or "is set". isset($_POST['submit']) is typically used to check if a form has been submitted Prior to running some code. In your example, it is likely that the form submit Button has been named 'submit'.
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