Object-oriented practice

1. Display data

Tables and classes correspond, table names are class names, and column names are members of a class

Each piece of data in the table corresponds to the object instantiated by the class

To create a class in Info.class.php:

<?php

Class Info

{

Public $code;

Public $name;

Public $sex;

Public $nation;

Public $birthday;

}

Load the info class on a new page:

<?php

Include ("Info.class.php");

$attr =array ();

$info 1=new Info ();

$info 1->code= "P001";

$info 1->name= "Zhang San";

$info 1->sex= "Male";
$info 1->nation= "Han";
$info 1->birthday= "1988-2-3";

Append an element to the array:

Array_push ($attr, $info 1);

$info 2= new Info ();
$info 2->code= "P002";
$info 2->name= "John Doe";
$info 2->sex= "female";
$info 2->nation= "Han";
$info 2->birthday= "1989-2-3";

Array_push ($attr, $info 2);

$info 3= new Info ();
$info 3->code= "P003";
$info 3->name= "Harry";
$info 3->sex= "Male";
$info 3->nation= "Hui";
$info 3->birthday= "1990-2-3";

Array_push ($attr, $info 3);

Var_dump ($ATTR);

echo "<table width= ' 100% ' border= ' 1 ' cellpadding= ' 0 ' cellspacing= ' 0 ' >";
echo "<tr><td> code </td><td> name </td><td> Gender </td><td> National </td> <td> birthday </td></tr> ";

foreach ($attr as $v)

{

echo "<tr>

<td>{$v->code}</td>

<td>{$v->name}</td>

<td>{$v->sex}</td>

<td>{$v->nation}</td>

<td>{$v->birthday}</td>

</tr> ";

}

echo "</table>";

?>

2. Find the difference of two circle area

2.1 Process-oriented:

$r 1=10;

$r 2=5;

$MJ = $r 1* $r 1*3.14-$r $r 2*3.14

Echo $MJ;

2.2 Object-oriented

Class Yuan

{

Public $r;

Function_construct ($r)

{

$this->r= $r;

}

function Mianji ()

{

return $this->r* $this->r*3.14

}

}

Load the Yuan class:

Include ("Yuan.class.php");

$y 1=new Yuan (10); Build a great circle

$y 2=new Yuan (5); Build a small Circle

echo $y 1->mianji ()-$y 2->mianji ();

Object-oriented practice