类(class)

PHP

代码

<meta charset="utf-8"> //已utf-8的格式输出，否则有中文输出到网站上会乱码。
<?php
/**
 * @Author: iamfree
 * @Date:   2018-03-31 17:33:58
 * @Last Modified by:   iamfree
 * @Last Modified time: 2018-03-31 22:15:51
 */
class Cls{
    /*类中的变量叫做类属性，类中的函数叫做类方法*/
    public $name = 'iamfree'; //类属性
	public $time = 2018; //类属性
    public function Func(){
        echo "this is a".__FUNCTION__."函数";
    }
}
$c = new Cls(); //实例化类对象
var_dump($c); //打印类的详细信息
echo "<br>";
$c -> Func(); //执行类中的方法
echo "<br>";
echo $c -> time;
echo "<br>";
echo $c -> name;
echo "<br>";
//$this用法
class Cls2{
	public $num;
	function setNum($num){
		$this -> num = $num;
		echo $this -> num;
		echo "<br>";
	}
}
$c2 = new Cls2;
echo $c2 -> setNum(520);
echo $c2 -> setNum(1314);

输出:

object(Cls)#1 (2) {
  ["name"]=>
  string(7) "iamfree"
  ["time"]=>
  int(2018)
}
<br>this is aFunc函数<br>2018<br>iamfree<br>520<br>1314<br>

if(isset($_POST['submit'])){
        if($_FILES['file']['type']=='image/png' or $_FILES['file']['type']=='image/jpeg' or $_FILES['file']['type']=='image/php'){ //这里对上传的文件的MIME类型进行了判断
            $name = '上传成功!上传的文件是:'.$_FILES['file']['name'].' ';
            $size = '文件大小是:'.$_FILES['file']['size'].' ';
        }else{
            $name = '抱歉！你上传的文件有误,请阻止你那肮脏的思想~';
        }
    }else{
        $name = "你没上传文件";
    }