Question

How to swap two numbers in PHP

Answer 1

$x = 345;
$y = 10;
         
$tmp = $x;
$x = $y;
$y = $tmp;
 
echo $x . " " . $y;




/*
run:

10 345

*/

 

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Answer 2

$x = 345;
$y = 10;
         
$x = $x + $y; 
$y = $x - $y;
$x = $x - $y; 
 
echo $x . " " . $y;




/*
run:

10 345

*/

 

70+ SQL courses for beginners and professionals

Answer 3

$x = 7;
$y = 19;
         
$x = $x * $y; 
$y = $x / $y; 
$x = $x / $y; 
 
echo $x . " " . $y;




/*
run:

19 7

*/

 

70+ SQL courses for beginners and professionals

Answer 4

$x = 7;
$y = 19;
         
list($x, $y) = array($y, $x);
 
echo $x . " " . $y;




/*
run:

19 7

*/

 

70+ SQL courses for beginners and professionals

Answer 5

function swap(&$x, &$y) {
    $tmp = $x;
    $x = $y;
    $y = $tmp;
}


$x = 345;
$y = 10;
        
swap($x, $y);

echo $x . " " . $y;






/*
run:

10 345

*/

 

70+ SQL courses for beginners and professionals