PHP时间戳与日期之间转换

<?php
echo(strtotime("now"));
echo(strtotime("3 October 2005"));
echo(strtotime("+5 hours"));
echo(strtotime("+1 week"));
echo(strtotime("+1 week 3 days 7 hours 5 seconds"));
echo(strtotime("next Monday"));
echo(strtotime("last Sunday"));
?>

输出：

1138614504
1128290400
1138632504
1139219304
1139503709
1139180400
1138489200

$a = date();
$mk = strtotime($a)

<?
$y=date("Y",time());
$m=date("m",time());
$d=date("d",time());
$start_time = mktime(9, 0, 0, $m, $d ,$y);
$end_time = mktime(19, 0, 0, $m, $d ,$y);

$time = time();
if($time >= $start_time && $time <= $end_time)
{
// do something....
}
?>

<?
$time = time();
$date = date("Y-m-d",$time);
echo 'www.111cn.net 提示'.$date
?>

$barray = array('a'=>1,'b'=>2,'wod'=>3,'c'=>4,'abc'=>5);
$del ='b';
unset($barray[$del]);//结果为

Array
(
    [a] => 1
    [wod] => 3
    [c] => 4
    [abc] => 5
)

$a1=array("Cat","Dog","Horse",'dff','dfdf','www');
$a2=array("dff","Horse","Dog");
$a1 = array_diff($a1,$a2);
sort($a1);
print_r($a1);

Array
(
    [0] => Cat
    [1] => dfdf
    [2] => www
)

$array = array('1', '2', '3', '4', '5');

$del_value = 3;
unset($array[array_search($del_value , $array)]);//利用unset删除这个元素

print_r($array);

输出

array('1', '2', '4', '5');

<?php
    $array = ('a' => "abc", 'b' => "bcd",'c' =>"cde",'d' =>"def",'e'=>"");
    array_filter($array);
    echo "<pre>";
    print_r($array);
?>

结果：

Array (

     [a] => abc

     [b] => bcd

     [c] => cde

    [d] => def

   )

function array_remove(&$arr,$offset){ 
    array_splice($arr,$offset,1); 

} 
$a = array('a','b','c','d'); 
array_remove($a,2); 
print_r($a);

if($a)
{
 echo $a;
}
else
{

}

//解决

$a=1;
if($a)
{
 echo $a;
}
else
{

}

//输出1
//在文章头部加

error_reporting(0);

if($a)
{
 echo $a;
}
else
{

}

<?php

// this是指向当前对象的指针

class test_this{
    private $content; //定义变量
   
    function __construct($content){ //定义构造函数
          $this->content= $content;
    }
    function __destruct(){}//定义析构函数
   
    function printContent(){//定义打印函数
        echo $this->content.'<br />';
    }
}

$test=new test_this('北京欢迎你！'); //实例化对象
$test->printContent();//北京欢迎你！

//parent是指向父类的指针

class test_parent{ //基类
    public $name;  //定义姓名  父类成员需要定义为public，才能够在继承类中直接使用 this来调用。
    function __construct($name){
        $this->name=$name;
    }
}
class test_son extends test_parent{ //派生类  继承test_parent
    public $gender;//定义性别
    public $age;    //定义年龄
    function __construct($gender,$age){ //继承类的构造函数
        parent::__construct('nostop');//使用parent调用父类的构造函数,来进行对父类的实例化
        $this->gender=$gender;
        $this->age=$age;
    }
    function __destruct(){}
    function print_info(){
        echo $this->name.'是个'.$this->gender.'，今年'.$this->age.'岁'.'<br />';
    }
}

$nostop=new test_son('女性','22');//实例化test_son对象
$nostop->print_info();//执行输出函数  nostop是个女性，今年23岁

class clss_a {
    
     private static  $name="static class_a";
    
     const PI=3.14;
     public $value;   
        
     public static function getName()
     {
        return self::$name;   
     }
     //这种写法有误，静态方法不能访问非静态属性
     public static function getName2()
     {
         return self::$value;
     }
     public function getPI()
     {
       return self::PI;   
     }
    
    
 }

class person{
function _ _destruct( )
{ echo "bye bye !“; }
}
$a=new person();

class Address{
     protected $city;
     protected $country;

     public function setCity($city){$this->city = $city;}
     public function getCity(){return $this->city;}
     public function setCountry($country){$this->country = $country;}
     public function getCountry(){return $this->country;}
}

class Person{
     protected $name;
     protected $address;
     //浅克隆
     public function __construct(){
          $this->address = new Address;
     }

     public function setName($name){
          $this->name = $name;
     }
     public function getName(){
          return $this->name;
     }

     public function __call($method,$arguments){
          if(method_exists($this->address,$method)){
               return call_user_func_array(array($this->address,$method),$arguments);
          }
     }
     //深克隆
     public function __clone(){
          $this->address = clone $this->address;
     }
}

$test1 = new Person;
$test2 = clone $test1;

$test1->setName('testname1');
$test1->setCity('testcity1');
$test2->setName('testname2');
$test2->setCity('testcity2');

echo $test1->getName().'-'.$test1->getCity()."n";
echo $test2->getName().'-'.$test2->getCity()."n";
//testname1-testcity2
//testname2-testcity2

class Person{
     protected $__data = array('email','test');

     public function __get($property){
          if(isset($this->__data[$property])){
               return $this->__data[$property];
          }else{
               return false;
          }
     }

     public function __set($property,$value){
          if(isset($this->__data[$property])){
               return $this->__data[$property] = $value;
          }else{
               return false;
          }
     }
 
     public function __isset($property){
          if(isset($this->__data[$property])){
               return true;
          }else{
               return false;
          }
     }
 
     public function __unset($property){
          if(isset($this->__data[$property])){
               return unset($this->__data[$property]);
          }else{
               return false;
          }
     }
}

$test = new Person;
$test->email= 'test';
var_dump($test->email);