PHP基础

<?php
$arr=[1,2,3,4,2,4,1];
$a=in_array(2,$arr);
var_dump($a);
$b=array_unique($arr);
$aa=array_keys($arr);
$bb=array_values($arr);
var_dump($b,$aa,$bb,$arr);
list($a1,$b1)=$arr;
echo $a1,$b1;
foreach($arr as $ass){
	echo $ass;
}
$a11=count($arr);
echo $a11;
array_push($arr,1,2,3);
var_dump($arr);
array_pop($arr);
array_pop($arr);
var_dump($arr);
$bb1=array_count_values($arr);
var_dump($bb1);
?>

<?php
	class Person{
		public $name="josn";
		protected $age=22;
		private $like="game";
		public function sayhello(){
			echo $this->like;
		} 
	}
	class Male extends Person{
		function sayhi(){
		echo $this->age;
		}
	}
	$person =new Person;
	$person->sayhello();
	echo $person->name;
	$male=new Male;
	$male->sayhi();
?>

<?php
	$i=10;
 if($i>8){
 	echo $i;
 }
 $arr=[1,2,3,4,5,6,7,8,9,10];
 for($j=0;$j<10;$j++){
 	echo $arr[$j];
 }
 $k=0;
 var_dump($k||1,$k&&2,$k<8);
?>

<?php
	header("content-type:text/html;charset=utf-8"); //设置字符的编码是utf-8

echo "aa回家";
 $str="aaaa";
 var_dump($str);
?>