1,PHP獲取當(dāng)前時(shí)間并打印，打印格式：2006-5-1022:21:21EchoData(‘Y-m-dH:is’,time());3,解釋一下PHP的類中 ,final,static的含ProtectPublicPrivateInterface Static4,5,loginnameadmin10sqlSelsect*fromloginwhereadminlike“%admin%”limit `categoryID`smallint(5)unsignedNOTNULL`categoryName`varchar(50)NOTNULLdefault'',PRIMARYKEY(`categoryID`)INSERTINTO`category``categoryParentID`,`categoryName`VALUES(0,'一級類別'),(1二級類別(1二級類別(1二級類別(2三級類別(2,(2,(3,(4哈哈(5, functionGet_Category($category_id=0,$level=0,$default_category={global$sql="SELECT*FROMcategoryORDERBYcategoryID$result=$DB->query($sqlwhile($rows=$DB-{'parent'=>$rows[categoryParentID],'name'=>$rows}if{return}{if($category['id']=={echo"<optionselected{echo"<option}if($level>{echo">".str_repeat("",$level)."".$category['name'].}{echo">".$category['name'].}}}[1Arrayid1name]=>[level]0ParentID0[4Arrayid4name]=>[level]1ParentID1[9Arrayid9name]=>[level]2ParentID4[3Arrayid3name]=>[level]1ParentID1[8]=>Array([id]=>8[name]=>aqqqqqd[level]=>2[ParentID]=>3[2Arrayid2name]=>[level]1ParentID1[7]=>Array([id]=>7[name]=>234234[level]=>2[ParentID]=>2[6]=>Array([id]=>6[name]=>333332[level]=>2[ParentID]=>2[5Arrayid5name]=>[level]2ParentID2[10]=>Array([id]=>10[name] [level]=>3[ParentID]=>5){global$sql="SELECT*FROMcategoryORDERBYcategoryID$result=$DB-while($rows=$DB-{}{if($key=={foreach($valAS$k=>{$options[$k]= if(count($children)>{$options=$options+}}}}return$options;}class{functionGet_Category($category_id=0,$level=0,$default_category={echo$arr=array('0'=>'1'=>

'1'=>array('id'=>1,'parent'=>0,'name'=>'2'=>array('id'=>2,'parent'=>0,'name'=>'4'=>array('id'=>4,'parent'=>0,'name'=>'3'=>array('id'=>3,'parent'=>1,'name'=>'5'=>array('id'=>5,'parent'=>1,'name'=>'3'=>'4'=>

'6'=>array('id'=>6,'parent'=>3,'name'=>'7'=>array('id'=>7,'parent'=>3,'name'=>'8'=>array('id'=>8,'parent'=>4,'name'=>'9'=>array('id'=>9,'parent'=>4,'name'=>)if{}{if($cate['id']=={$txt="<optionselected$txt="<option}if($level>{$txt1=">".str_repeat("-",$level)."".$cate['name'].$txt1=">".$cate['name'].}$val=$txt.$txt1;echo$val;}}functiongetFlush($category_id=0,$level=0,$default_category={$out=return$out;}}$id=$_GET['id'];echo$c=new echo$ttt;echo8,寫一個(gè)函數(shù)，盡可能高效的，從一個(gè)標(biāo)準(zhǔn)url里取出文件的擴(kuò)展名例如:h .cn/abc/de/fg.php?id=1需要取出php或.php答案1:function$arr=$file=$ext=explode(".",$file);return$ext[1];}$url=$pos1=$pos2=returnsubstr($url,$pos1+1,$pos