【php学习-5】

mutil_query($result)){ //多查询 where } //执行查询 /* $result=$cone->query("SELECT * from test"); while($row=$result->fetch_row()){ print $row[0]; } $result-free(); */ ?> real_connect("localhost","","","test"); $mysqli->options(MYSQLI_OPT_CONNECT_TIMEOUT,5); #建立mysql连接选项 if(msqysqli_connect_erron){ die(msqli_connect_error()); }else{ print /*mysqli->host_info*/ //$mysqli_get_host_info($mysqli); //} ?> host_info(); } */ ?> host_info; } */ /* $dbs=new mysqli("localhost","","","test"); if(mysqli_connect_errno){ die("mysqli_connect.failed".mysqli_connect_error()); }else{ print $mysqli->host_info(); } */ #函数连接 /* $db=mysqli_connect("localhost","","","test"); //判断数据库是不是连接成功 if(empty($db)){ //返回数据库连接失败信息 die ("mysqli_connect.failed".mysqli_connect_error()); }else{ //连接成功 print mysqli_get_host_info($db); //echo mysqli_init(); } */ //关闭数据库连接 #mysqi_close($db); #require_once "8.php"; //包含函数 /* function hashFx() { $data=''; $x=array(); foreach($array as $key=>$value){ $data.=$key.$value; $x="$key=$value"; } $hash=hash($data); $x[]="hash=$hash"; return join('&',x[]); # code... } echo '"liupeng","age"=>18); print_r(hash($x)); */ ?> animalFX(); }else{ print"no have animal"; } # code... } inputAnimal(new cat()); ?> catFx(); }else if($obj instanceof dog){ $obj->dogFx(); }else{ print"no animal"; } # code... } animalFx(new cat()); animalFX(new dog()); ?> var_1=11; print $var1->var_1.$var2->var_1; ?> print_Color(); ?> y=self::$x; # code... } } $z=new myClass(); print $z->y; $w=new myClass(); print $w->y; /* class staticMyclass{ static $ansewer=0; static $word=0; function method() { print self::$word; # code... } } $x=new staticMyclass(); $x->method; staticMyclass::$ansewer++; //访问静态方法属性 print staticMyclass::$ansewer; */ /* public #公有成员(函数，变量) private #私有成员 protected #受保护成员 class Dbclass{ private $x; //只能在内部调用 function createDbConnection($x) { $x=$this->$x; protected $y=$x;//包括继承类可以调用 # code... } public setDbConnection(){ //整个程序可以调用 return $this->x; } } //继承类 class DbNodeClass extends Dbclass{ $y="hello world" */ /* class whiteClass{ function __destruct(){ //析构函数 print "this is a white function"; } } $x=whiteClass(); $x=NULL； */ ?> $by=$by; # code... } function getTraveal() { return $this->$by; # code... } private $by; } $bike=new traveal("mile"); print $bike->getTraveal(); */ ?>