A function is
just a name we give to a block of code that can be executed whenever we need
it. The function name can start with a letter or underscore (not a number)
When you
create a function, you first need to give it a name, like myFunction. It's with this function name that you will be able to
call upon your function, so make it easy to type and understand.
|
<?php
function myFunction(){
}
?>
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<?php
function writeName() {
echo "Pooja Pandya"
echo "My name is " .writeName();
?>
|
Output:
My name
is Pooja Pandya
|
|
Argument Function
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Default Argument Function
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Variable Function
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Return Function
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<?php
function add($a,$b)
{
$sum=$a+$b;
echo "Sum:-$sum";
} add(10,20);
?>
|
<?php
function my($type="tea")
{
return "Making a cup of
$type<br>";
}
echo my();
echo my("milk");
?>
|
<?php
function var1($string)
{
echo $string;
}
$func='var1';
$func('Hello World');
?>
|
<?php
{
$a*$a;
}
echo square(4);
?>
|
|
Output:
Sum:-30
|
Output:
Making a cup of tea type
Making a cup of milk type
|
Output:
Hello World
|
Output:
16
|
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