円計算
#新しい Cirle.class.php ファイルの作成
<?php
function yan($arr) {
$bz = true;
if ($arr['r']< 0) {
$this->error .= "半径小于0;";
$bz = false;
} else {
if (!is_numeric($arr['r'])) {
$this->error .= "半径不是数字;";
$bz = false;
}
}
return $bz;
}
<?php
class Cirle extends Shape {
private $r;
function __construct($arr = array()) {
if (!empty($arr)) {
$this->r = $arr['r'];
}
$this->name = "圆形";
$this->error = '';
}
function area() {
return pi()* $this->r* $this->r; ;
}
function zhou() {
return 2*$this->r*pi();
}
function view($arr) {
$form='';
$form .= "<form action='index.php?action=cirle' method='post'>";
$form .= "请输入".$arr['name']."的半径:<input type='text' name='r' value='".$_POST['r']."'/><br>";
$form .= "<br>";
$form .= "<input type='submit' name='sub' value='提交'/> ";
$form .= "<input type='reset' name='ret' value='重置'/>";
$form .= "</form>";
echo $form;
}
function yan($arr) {
$bz = true;
if ($arr['r']< 0) {
$this->error .= "半径小于0;";
$bz = false;
} else {
if (!is_numeric($arr['r'])) {
$this->error .= "半径不是数字;";
$bz = false;
}
}
return $bz;
}
}
?>
実行結果は次のとおりです: