в 10:37, 26 мая 2010

2010-05-26T10:37:27Z

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2010-05-26T07:00:42Z

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==Class Constant==



<source lang="html4strict">

<?php
class Employee {
const AVAILABLE = 0;
const OUT_OF_STOCK = 1;
public $status;
}
print Employee::AVAILABLE;
?>

</source>

==Define class constant==



<source lang="html4strict">
<?php
class math_functions {
const PI = "3.14159265";
const E = "2.7182818284";
const EULER = "0.5772156649";
/* define other constants and methods here... */
}
echo math_functions::PI;
?>

</source>

==Define class level constant value to control the class behaviour==



<source lang="html4strict">

<?php
abstract class Product {
protected $count;
const FIXED = 1;
const TIMED = 2;
private $costtype = 1;
function __construct( $count, $costtype=1 ) {
$this->count = $count;
$this->costtype = $costtype;
}
function cost() {
switch ( $this->costtype ) {
CASE self::TIMED :
return (5 * $this->count);
break;
CASE self::FIXED :
return 30;
break;
default:
$this->costtype = self::FIXED;
return 30;
}
}
function chargeType() {
switch ( $this->costtype ) {
CASE self::TIMED :
return "hourly rate";
break;
CASE self::FIXED :
return "fixed rate";
break;
default:
$this->costtype = self::FIXED;
return "fixed rate";
}
}
}
class ProductOne extends Product {
}
class ProductTwo extends Product {
}
$lesson = new ProductTwo( 4, Product::TIMED );
$lesson = new ProductTwo( 4, Product::FIXED );
$lesson = new ProductTwo( 4, 33 );
print "lesson charge {$lesson->cost()}. Charge type: {$lesson->chargeType()}\n";
?>

</source>

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PHP/Class/Class Constant Property - История изменений

в 10:37, 26 мая 2010

Admin: 1 версия