Function-1
<html>
<body>
<?php
function mySum($numX, $numY){
$total = $numX + $numY;
return $total;
}
$myNumber = 0;
echo "Before the function, myNumber = " .$myNumber. "<br />";
$myNumber = mySum(3, 4); // Store the result of mySum in $myNumber
echo "After the function, myNumber = ".$myNumber. "<br />";
?>
</body>
</html>
Function-2
<html>
<body>
<?php
$makefoo = true;
bar();
if ($makefoo) {
function foo()
{
echo "I don't exist until program execution reaches me.\n";
}
}
if ($makefoo) foo();
function bar()
{
echo "I exist immediately upon program start.\n";
}
?>
</body>
Function-3
<html>
<body>
<?php
function foo()
{
function bar()
{
echo "I don't exist until foo() is called.\n";
}
}
foo();
?>
</body>
</html>
Function-4
<html>
<body>
<?php
function A(){
echo("Hello, I'm A\n");
}
echo("I just defined A\n");
return;
function B(){
echo("Hello, I'm B\n");
}
echo("I just defined B\n");
?>
</body>
</html>
Function-5
<html>
<body>
<?php
function a($n){
b($n);
return ($n * $n);
}
function b(&$n){
$n++;
}
echo a(5);
?>
</body>
</html>
Function-6
<html>
<body>
<?PHP
/* Define Function */
function plus($a, $b){
$c=$a+$b;
echo "$a+$b=$c </br>";
}
plus(2,5);
?>
</body>
</html>
Function-7
<html>
<body>
<?php
class A {
function A() { }
function ech() {
$a = func_get_args();
for( $t=0;$t<count($a); $t++ ) {
echo $a[$t];
}
}
}
$test = new A();
$test->ech(0,1,2,3,4,5,6,7,8,9);
?>
</body>
</html>
Function-8
<html>
<body>
<?php
// Test of static/non-static method overloading, sort of, for php
class test {
var $Id = 2;
function priint ($id = 0) {
if ($id == 0) {
echo $this->Id;
return;
}
echo $id;
return;
}
}
$tc = new test ();
$tc->priint ();
echo "\n";
Function-9
<html>
<body>
<?php
function small_numbers()
{
return array (0, 1, 2);
}
list($zero, $one, $two) = small_numbers();
?>
</body>
</html>
Inheritance
<html>
<body>
<?php
class p {
function p() {
print "Parent's constructor\n";
}
function p_test() {
print "p_test()\n";
$this->c_test();
}
}
class c extends p {
function c() {
print "Child's constructor\n";
parent::p();
}
function c_test() {
print "c_test()\n";
}
}
$obj = new c;
$obj->p_test();
?>
</body>
</html>
Recursion
<html>
<body>
<?php
function recursion($a)
{
if ($a < 10) {
echo "before: ".$a."\n";
recursion($a + 1);
echo "after: ".$a."\n";
}
}
recursion(0);
?>
</body>
</html>
