In this article I will show you how to create your own function. To keep the script from being executed when the page loads, you can put it into a function. A function will be executed by a call to the function. You may call a function from anywhere within a page.
Let’s we have an example, how to implement PHP functions.
Syntax:
function function_Name()
{
code to be executed;
}
Note: The function name can start with a letter or underscore (not a number).
Example:Creating function with no parameter
<html>
<head>
<title> Function Test</title>
</head>
<body>
<?php
// Creating function with AdditionNum name for adding two integer value
function AdditionNum()
{
$num1 = 45;
$num2 = 45;
print "Addition of two number is : ".($num1+$num2);
}
echo "This is function value : "."</br>";
// Calling function
AdditionNum();
?>
</body>
</html>
Output:
Example:Creating function with parameter.
Let’s we have an example, how to create a function with parameter.
Syntax:
function functionName(param1, param2,...)
{
code to be executed;
}
<html>
<head>
<title> Function with parameter</title>
</head>
<body>
<?php
functionAdditionNum($num1,$num2)
{
print "Addition of two number is : ".($num1+$num2);
}
echo "This is function with parameter : "."</br>";
// Calling function
AdditionNum(12,13);
?>
</body>
</html>
Output:
Example:Function with ‘return’ statement.
Let’s we have an example, how to implement function with return type statement in PHP.
<html>
<head>
<title> Function with parameter</title>
</head>
<body>
<?php
functionAddNum($num1,$num2)
{
return ($num1+$num2);
}
// calling AddNum function
echo "Addition of(12 + 13) : ".AddNum(12,13);
?>
</body>
</html>
Output:
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