Checking If Then statements in PHP

Question

When I write an if statement, I check the variable as follows:

if(isset($_GET['username']){
 echo "set";
 } else {
 echo "unset";
}

How can I get an if statement to check if two variables are set:

if(isset($_GET['username'] & $_GET['firstname'])){
 echo "set";
 } else {
 echo "unset";
}

So basically, how can I check two things in an if statement right away?

Answer 1

Check out the PHP manual on control structures and logical operators :

if(isset($_GET['username']) && isset($_GET['firstname'])) {
    echo "set";
} else {
    echo "unset";
}

Using solo &performs a bitwise operation , which is definitely not what you want.

andis also synonymous with syntax &&, as other answers have shown.

EDIT. , , isset, isset. , - - , .

Answer 2

if ( isset($_GET['username'], $_GET['firstname']) ) {
    echo 'Set!';
}

isset , , isset() TRUE , , , .

Answer 3

if ( isset($_GET['username']) && isset($_GET['firstname']) )

Answer 4

&& ( ), ( )

isset true , if true, if false.

Answer 5

,

echo ((isset ($ _ GET ['username']) && isset ($ _ GET ['firstname']))? "set": "unset" );

Answer 6

if (isset($_GET['username']) AND isset($_GET['firstname']))
{
    echo "set";
}
else
{
    echo "unset";
}

Answer 7

if (isset($_GET['username']) && isset($_GET['firstname']))
{ 
    echo "set"; 
} 
else 
{ 
    echo "unset"; 
}

: PHP