Function in php

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PHP has inbuilt functions even we can create user defined functions in php as well. inbuilt functions we can call directly. user defined function is created with the keyword function.

Syntax User defined function in php

<?php
function <functionName>()
 {
   // code here
 }

functionName(); //to call the function
?>

 <?php
 function myMsg()
{
echo "Welcome message in function";
}
myMsg();
?>

output of the above program is Welcome message in function. We can also pass the argument to a function and function may also return the value as shown in following example.

<?php
 function sum($a , $b)
 {
  $c=$a+$b;
 return $c;
 }
$sum=sum(10,20);
echo "the sum of 10 20 is".$sum;
?>

in the above program instead of static number value may be passed with the help of variable.Output of the above program is shown as below.

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Function in PHP

Syntax User defined function in php

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