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Example: A Php program to show output using a user-defined function[UDF](No Argument-No Return).
<!DOCTYPE html>
<html>
<body>
<?php
function msg() //function created
{
echo "Hello India world, how are you";
}
msg(); //function calling
?>
</body>
</html>Example: A Php program to show output using a user-defined function(With Argument-No Return).
<!DOCTYPE html>
<html>
<body>
<?php
function msg($country) //parameterised function created
{
echo $country;
}
msg("India"); //function calling
?>
</body>
</html>Example: A Php program to show output using a user-defined function(No Argument-with Return).
<!DOCTYPE html>
<html>
<body>
<?php
function msg() //function created
{
$x="Great India";
return $x;
}
echo msg(); //function calling
?>
</body>
</html>Example: A Php program to show output using a user-defined function(with value as Argument-with Return).
<!DOCTYPE html>
<html>
<body>
<?php
function msg($x,$y) //argument & return function created
{
$z=$x+$y;
return $z;
}
echo msg(10,20); //function calling
?>
</body>
</html>
--------------------- OR ----------------------
<!DOCTYPE html>
<html>
<body>
<?php declare(strict_types=1); // strict is compulsory
function addition(float $x, float $y) : int{
return (int)($x + $y);
}
echo addition(20.20, 25.30);
?>
</body>
</html>
Output:45Example: A Php program to show default parameters using a user-defined function.
<!DOCTYPE html>
<html>
<body>
<?php
// function with default parameter value 75
function def($str, $num=75)
{
echo "$str is $num years old";
}
def("John", 10);
echo "</br>";
// In this call, the default value 10
def("Robert");
?>
</body>
</html>
Output:
John is 10 years old
Robert is 75 years old Example: A Php program to show output using a user-defined function (with reference as Argument-with Return).
<!DOCTYPE html>
<html>
<body>
<?php
function msg(&$num) //function created
{
$z=$num+10;
return $z;
}
$val=15;
echo msg($val); //function calling
echo "<br>";
echo $val;
?>
</body>
</html>
Output:
25
15 
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