PHP Object polymorphism Simple graphing calculator Gaulo PHP

Main Program Page test.php page

<! Doctype html>
Shape abstract Class Shape.class.php page
<?php//Shape abstract class shape{public $name;        Area of abstract function areas ();        Perimeter abstract function circumference ();        Graphical interface abstract function view ();        Shape Verification Method Abstract function validate ($arr); }
Rectangle Class Rectangle.class.php Page
<?php //Rectangle class class rectangle extends shape{    private  $width;     private  $height;     function __construct ($arr =array ()) {         if (!empty ($arr)) {          $this->width   =   $arr [' Width '];          $this->height  =   $arr [' Height '];         }         $this->name   =   ' Rectangle ';     }     function area () {         return  $this->width* $this->height;    }    //circumference     function circumference () {        return  2* ($this->width+ $thiS->height)     }    //graphical Interface   function view () {          $form  =   ' <form action= ' test.php?action= Rectangle " method=" post "> ';         $form  .=  $this- >name. ' Width: <input type= "text"  name= "width"  value= "'. $_post[' width ']."  /> <br/> ';          $form  .=  $this- >name. ' High: <input type= "text"  name= "height"  value= "'. $_post[' height ']."  /> <br/> ';          $form  .=  ' < Input type= "Submit"  name= "Dosubmit"  value= "calculation"  /> <br/> ';           $form  .=  ' </form> ';         echo  $form;     }     //shape Verification Method      function validate ($arr) {          $flag  = true;        if ($arr [' Width ']<0  | |  !is_numeric ($arr [' width '])) {            echo   $this->name. ' The width must be an integer greater than 0 <br/> ';             $flag  =  false;        }         if ($arr [' Height ']<0 | |  !is_numeric ($arr [' height ']) {             echo  $this->name. ' The high must be an integer greater than 0 <br/> ';             $flag  =  false;        }         return  $flag;     }    } 
 Triangle Class Triangle.class.php page 
 
<?php //Triangle class class triangle extends shape{    private  $edge 1;     private  $edge 2;    private  $edge 3;     function __construct ($arr =array ()) {        if (!empty ($arr)) {         $this->edge1   =   $arr [' Edge1 '];          $this->edge2   =   $arr [' Edge2 '];          $this->edge3   =   $arr [' Edge3 '];                 }          $this->name   =   ' triangle ';     }     function area () {           $p  = ($this->edge1+ $this->edge2+ $this->edge3)/2;             &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;RETURN&NBSP;SQRT ($p * ($p-$this->edge1) * ($p-$this->edge2) * ($p-$this- Edge3)     }    //circumference     function  Circumference () {        return  ($this->edge1+ $this->edge2+$ THIS-&GT;EDGE3)     }    //graphical Interface   function view () {          $form  =   ' <form action= ' test.php?action= Triangle " method=" post "> ';         $form  .=  $this- >name. ' The first side: <input type= "text"  name= "Edge1"  value= "'. $_post[' Edge1 ']. '"  /> <br/> ';          $form  .=  $this- >name. ' The second side: <input type= "text"  name="Edge2"  value= "'. $_post[' Edge2 ']."  /> <br/> ';          $form  .=  $this- >name. ' Third side: <input type= "text"  name= "Edge3"  value= "'. $_post[' Edge3 ']. '"  /> <br/> ';          $form  .=  ' < Input type= "Submit"  name= "Dosubmit"  value= "calculation"  /> <br/> ';           $form  .=  ' </form> ';         echo  $form;     }    //Shape Verification Method       function validate ($arr) {         $flag  = true;         if ($arr [' Edge1 ']<0 | |  !is_numeric ($arr [' Edge1 '])) {            echo   $this->name. ' The first side must be greater than 0The integer <br/> ';             $flag  =  False;        }        if ($arr [' Edge2 ']<0 | |  !is_numeric ($arr [' Edge2 '])) {            echo   $this->name. ' The second side must be an integer greater than 0 <br/> ';             $flag  =  false;        }         if ($arr [' Edge3 ']<0 | |  !is_numeric ($arr [' Edge3 '])) {            echo   $this->name. ' The third side must be an integer greater than 0 <br/> ';             $flag  =  false;        }         if ($arr [' Edge1 ']+ $arr [' Edge2 ']< $arr [' Edge3 '])  | |   ($arr [' Edge1 ']+ $arr [' Edge3 ']< $arr [' edge2 ']) | | ($arr [' Edge3 ']+ $arr [' Edge2 ']< $arr [' Edge1 '])  ) {             echo  ' triangle definition must be on both sides of the sum greater than the third side <br/> ';              $flag  = false;        }         return  $flag;     }    }
Browser Rectangle page
650) this.width=650; "Src=" Http://s4.51cto.com/wyfs02/M00/86/B3/wKioL1fH6jyDX36YAAAlAetgXQU441.png-wh_500x0-wm_3 -wmp_4-s_226034738.png "title=" Firefox _2016-09-01t08-42-48.546z.png "alt=" wkiol1fh6jydx36yaaalaetgxqu441.png-wh_50 "/ >
Browser Triangle page
650) this.width=650; "Src=" Http://s5.51cto.com/wyfs02/M02/86/B3/wKiom1fH6pnis5EBAAAsmecwmrE954.png-wh_500x0-wm_3 -wmp_4-s_3044092545.png "title=" Firefox _2016-09-01t08-44-41.873z.png "alt=" wkiom1fh6pnis5ebaaasmecwmre954.png-wh_50 "/ >
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PHP Object polymorphism Simple graphing calculator Gaulo PHP