PHP常用設計模式匯總

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裝飾模式：

<?phpabstract class Tile {  abstract function getWealthFactor();}class Plains extends Tile {  private $wealthfactor = 2;  function getWealthFactor() {    return $this->wealthfactor;  }}abstract class TileDecorator extends Tile { // 裝飾  protected $tile;  function __construct( Tile $tile ) {    $this->tile = $tile;  }}class DiamondDecorator extends TileDecorator { // 鑽石裝飾  function getWealthFactor() {    return $this->tile->getWealthFactor()+2;  }}class PollutionDecorator extends TileDecorator { // 汙染裝飾  function getWealthFactor() {    return $this->tile->getWealthFactor()-4;  }}$tile = new Plains();print $tile->getWealthFactor(); // 2$tile = new DiamondDecorator( new Plains());print $tile->getWealthFactor(); // 4$tile = new PollutionDecorator( new DiamondDecorator( new Plains()));print $tile->getWealthFactor(); // 0?>

 組合模式：

<?phpabstract class Unit {  abstract function bombardStrength();}class Archer extends Unit {  function bombardStrength() {    return 4;  }}class LaserCannonUnit extends Unit {  function bombardStrength() {    return 44;  }}class Army {  private $units = array();  private $armies= array();  function addUnit( Unit $unit ) {    array_push( $this->units, $unit );  }  function addArmy( Army $army ) {    array_push( $this->armies, $army );  }  function bombardStrength() {    $ret = 0;    foreach( $this->units as $unit ) {      $ret += $unit->bombardStrength();    }    foreach( $this->armies as $army ) {      $ret += $army->bombardStrength();    }    return $ret;  }}$unit1 = new Archer();$unit2 = new LaserCannonUnit();$army = new Army();$army->addUnit( $unit1 );$army->addUnit( $unit2 );print $army->bombardStrength();print "\n";$army2 = clone $army; // 複製軍隊$army->addArmy( $army2 );print $army->bombardStrength();print "\n";?>

 原廠模式

 <?php     /**      * 操作類      * 因為包含有抽象方法，所以類必須聲明為抽象類別      */     abstract class Operation{         //抽象方法不能包含函數體         abstract public function getValue($num1,$num2);//強烈要求子類必須實現該功能函數     }     /**      * 加法類      */     class OperationAdd extends Operation {         public function getValue($num1,$num2){             return $num1+$num2;         }     }     /**      * 減法類      */     class OperationSub extends Operation {         public function getValue($num1,$num2){             return $num1-$num2;         }     }     /**      * 乘法類      */     class OperationMul extends Operation {         public function getValue($num1,$num2){             return $num1*$num2;         }     }     /**      * 除法類      */     class OperationDiv extends Operation {         public function getValue($num1,$num2){             try {                 if ($num2==0){                     throw new Exception("除數不能為0");                 }else {                     return $num1/$num2;                 }             }catch (Exception $e){                 echo "錯誤資訊：".$e->getMessage();             }         }    /**     * 工廠類，主要用來建立對象     * 功能：根據輸入的運算子號，工廠就能執行個體化出合適的對象     *     */    class Factory{        public static function createObj($operate){            switch ($operate){                case ‘+‘:                    return new OperationAdd();                    break;                case ‘-‘:                    return new OperationSub();                    break;                case ‘*‘:                    return new OperationSub();                    break;                case ‘/‘:                    return new OperationDiv();                    break;            }        }    }    $test=Factory::createObj(‘/‘);    $result=$test->getValue(23,0);    echo $result;?>

 

PHP常用設計模式匯總