A PHP function is used to execute a branch of code when needed from the pages where the function is included, and the PHP functions can call several times,
A normal PHP function
to write a normal PHP function first declare the function then write some code inside the function or inside the scope and then call the function from anywhere of the page.
echo “Inside the php function”;
** in this case it will print the string on the position from where you have called the function.
A PHP function with passing value
Through a PHP function you can pass a single or multiple value and work with that value, a 2 variable passing and sum of them example is given below,
$c = $a + $b;
echo “The sum of a and b = ” . $c;
fn_sum(); // it will print The sum of a and b = 0
fn_sum(4); // it will print The sum of a and b = 4
fn_sum(2,4); // it will print The sum of a and b = 6
** in this case if you are not sending any value then it will take the value which is assign on the first bresses of the function.
** and on the second case it will get the first value which is sent and the second value which is assigned on the functions first bresses
** in in case of the third example it will get the 2 both value will be taken as the sending value is the first priority.
A PHP function with the return value
Like the above 2 functions the return type function does not just execute the code or print, it uses to return a value also which can be used after calling the function, an example is given below.
$c = $a + $b;
$e = fn_sum(2,4); //In this case the value of e will be 6
echo $e; // It will print here 6
Please try the PHP Functions by yourself and i hope that you get a clear view on php function.
Thanks for reading.