Milk's Leisure

1.Concertration operator: "."

ex.

<?php
$string="<b>Hello World!</b>";
$string2="This is a small world.";
echo $string." ".$string2;
?>

result:

Hello World! This is a small world.

2.String length: strlen()

ex.

<?php

$string="<b>Hello World!</b>";

echo strlen($string);

?>

result:

19

3.Switch:

ex.

<?php
$x=4;
switch($x)
{
        case 1:
                echo "1";
                break;
        case 2:
                echo "2";
                break;
        default:
                echo "not proper";
                break;
}
?>


result:

not proper

4.array

ex.

<?php
$price = array("milk"=>200,"pen"=>25,"love"=>"can't be understood");
echo $price["milk"]."<br>";
echo $price["pen"]."<br>";
echo $price["love"]."<br>";
?>

result:

200
25
can't be understood

5.Multidimention array

ex.

<?php
$price = array("book"=>array(200,3000,50),
                "pen"=>array(60,80),
                "stone"=>array(0,5000,100000,"can't be understood"));
echo $price["book"][1]."<br>";
echo $price["pen"][0]."<br>";
echo $price["stone"][3]."<br>";
?>


result:

3000
60
can't be understood

6.for loop

ex.

<?php
$price = array("book"=>array(200,3000,50),
                "pen"=>array(60,80),
                "stone"=>array(0,5000,100000,"can't be understood"));
for($x=0;$price["book"][$x];++$x) echo $price['book'][$x]." ";
?>


result:

200 3000 50

7.foreach loop

For every loop iteration, the value of the current array element is assigned to $value (and the array pointer is moved by one) - so on the next loop iteration, you'll be looking at the next array value.

ex.

<?php
$price = array("book"=>array(200,3000,50),
                "pen"=>array(60,80),
                "stone"=>array(0,5000,100000,"can't be understood"));
foreach(array('book','pen','stone') as $item) echo $price[$item][0]." ";
?>


result:

200 60 0

8.function

ex.

<?php
$price = array("book"=>array(200,3000,50),
                "pen"=>array(60,80),
                "stone"=>array(0,5000,100000,"can't be understood"));
function cart($item_price,$number)
{
        $sum=$item_price*$number;
        echo "it cost $".$sum." in this category<br>";
        return $sum;
}

echo "the total price is ".(cart($price['book'][1],3)+cart($price['stone'][2],2));
?>


result:

it cost $9000 in this category
it cost $200000 in this category
the total price is209000