function():
A set of specific program and source code which complete a specific task is function.
Function separates the complexity of a large program and provides a
modular approach. There are two type of function user define function
and library function. Now focus on user defines function and try to
understand.
Syntex of PHP function :
function functionName()
{
code to be executed;
}
Complete Example of PHP Function
[html]<!DOCTYPE html>
<html lang=”en”>
<head>
<title>IP Address</title>
<meta charset=”utf-8″ />
</head>
<body>
<?php
function crdt(){
$dt=date(“m/D/Y”);
return $dt;
}
echo crdt();
?>
</body>
</html>
[/html]
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<?php
function star() //no parameter
{
for($i=1;$i<=40;$i++)
{
echo "*"; //no return value
}
echo"<br>";
}
star(); //function call but no argument
star();
?>
<?php
function reverse($num) //parameter receive
{
for($mod=0,$rev=0;$num>0;$num=(int)($num/10))
{
$mod=$num%10;
$rev=$rev*10+$mod;
}
echo "Out put in function"."<br>";
echo "Reverse=".$rev;
//function no return .
}
$number=365;
reverse($number); //argument passing
?>
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