php tutorial , How to use function php 7 ?

What is function ? you have question right ? function is called reusable code that define one time we can use it many time, function save our time to do same time of job many time 

Example 

Function without argument :

<?php

function msg() {
    echo "data saved";
}

msg(); // function call

?> 

result : data saved


here if we need to print mesage data save after insert record. The same process for another record so it's good idea to make function and call the function 


Function with argument :

<?php

function collegename($cname) {
    echo "your college name is $cname.<br>";
}

collegename("sent joseph");


?>

result :

your college name is sent joseph.

Function With return arguments :

<?php

function sum($a,$b) {

    return $a + $b;

}

echo sum(5,10);

?>

result : 15