PHP與SQL語句常用大全

<?php
$conn=mysql_connect("localhost","root","root");
mysql_select_db("db_database17",$conn);
mysql_query("set names gb2312");
?>
<?php
$sql1=mysql_query("select usernc,face,ip,email,qq from tb_user where id='".$info["userid"]."'",$conn);
$info1=mysql_fetch_array($sql1);
echo $info1["face"];
?>
action="savereg.php"
<input type="text" name="usernc"
<input type="text" name="userpwd"
<input type="text" name="truename"
<?php
if(mysql_query("insert into tb_user(usernc,userpwd,truename,email,qq,tel,ip,address,face,regtime,sex,usertype) values('".$usernc."','".md5(trim($_POST["userpwd"]))."','".$_POST["truename"]."','".$_POST["email"]."','".$_POST["qq"]."','".$_POST["tel"]."','".$ip."','".$_POST["address"]."','".$_POST["face"]."','".date("Y-m-d H:i:s")."','".$_POST["sex"]."','0')",$conn)){
if($_SESSION["unc"]!=""){
 session_unregister("unc");
 }
session_register("unc");
 $_SESSION["unc"]=$usernc; 
 echo "<script>alert('注冊成功！');history.back();</script>";
}else{
 echo "<script>alert('注冊失敗！');history.back();</script>";
}
?>
<?php
 $sql=mysql_query("select count(*) as total from tb_leaveword ",$conn);//把查詢的結果存入total中
 $info=mysql_fetch_array($sql);
 $total=$info[total];
 if($total==0){
 echo "<div align=center>對不起，暫無留言！</div>";
 }else{
 if(!isset($_GET["page"]) || !is_numeric($_GET["page"])){
 $page=1;
 }else{
 $page=intval($_GET["page"]);
 }
 $pagesize=3;
 if($total%$pagesize==0){
 $pagecount=intval($total/$pagesize);
 }else{
 $pagecount=ceil($total/$pagesize);
 }
 $sql=mysql_query("select * from tb_leaveword order by createtime desc limit ".($page-1)*$pagesize.",$pagesize ",$conn);
 while($info=mysql_fetch_array($sql)){
 ?>
<table width="520" height="5" border="0" align="center" cellpadding="0" cellspacing="0">
 <tr>
 <td></td>
 </tr>
 </table>
 <table width="550" height="155" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#FCD424">
 <tr>
 <td bgcolor="#FFFFFF" valign="top"><table width="550" height="24" border="0" align="center" cellpadding="0" cellspacing="0">
 <tr>
 <td width="450" background="images/dh_back_1.gif"> 主 題：<?php echo unhtml($info["title"]);?></td>
 <td width="100" background="images/dh_back_1.gif"><div align="center">
 <script language="javascript">
 function openeditwindow(x){
 window.open("editleaveword.php?id="+x,"newframe","top=100,left=200,width=450,height=280,menubar=no,location=no,scrollbars=no,status=no");
 }
 </script>
 <?php
 $sqlu=mysql_query("select usernc from tb_user where id='".$info["userid"]."'",$conn);
 $infou=mysql_fetch_array($sqlu);
 if($infou["usernc"]==$_SESSION["unc"]){
 ?>
 <a href="javascript:openeditwindow(<?php echo $info[id];?>)" class="a1">編輯</a>
 <?php
 }
 ?>
 
 <?php
 if($_SESSION["unc"]!=""){
 $sqld=mysql_query("select usertype from tb_user where usernc='".$_SESSION["unc"]."'",$conn);
 $infod=mysql_fetch_array($sqld);
 if($infod["usertype"]==1){
 ?>
 <a href="javascript:if(window.confirm('確定刪除該留言信息么？')==true){window.location.href='deleteleaveword.php?id=<?php echo $info[id];?>';}" class="a1">刪除</a>
 <?php
 }
 }
 ?>
 </div></td>
 </tr>
 </table>
 <table width="550" height="5" border="0" align="center" cellpadding="0" cellspacing="0">
 <tr>
 <td></td>
 </tr>
 </table>
 <table width="550" height="120" border="0" align="center" cellpadding="0" cellspacing="0">
 <tr>
 <td width="150" height="90"><div align="center"><img src="<?php
 $sql1=mysql_query("select usernc,face,ip,email,qq from tb_user where id='".$info["userid"]."'",$conn);
 $info1=mysql_fetch_array($sql1);
 echo $info1["face"];
 ?>" /><br><?php echo $info1["usernc"];?></div></td>
 <td width="10" background="images/line_down.gif"></td>
 <td width="390" rowspan="2"><?php echo unhtml($info["content"]);?></td>
 </tr>
 <tr>
 <td height="30"><div align="center"><img src="images/email.gif" width="45" height="16" alt="<?php echo $info1[email];?>"/><img src="images/ip.gif" width="55" height="16" alt="<?php echo $info1[ip];?>"/><img src="images/qq.gif" width="45" height="16" alt="<?php echo $info1[qq];?>"/></div></td>
 <td width="10" background="images/line_down.gif"></td>
 </tr>
 </table>
 </td>
 </tr>
 </table>
 <?php
 }
 }
 ?>
 
 <table width="550" height="25" border="0" align="center" cellpadding="0" cellspacing="0">
 <tr>
 <td width="351"><div align="left">共有留言 <?php echo $total;?> 條 每頁顯示 <?php echo $pagesize;?> 條 第 <?php echo $page;?> 頁/共 <?php echo $pagecount;?> 頁</div></td>
 <td width="199"><div align="right"><a href="<?php echo $_SERVER["PHP_SELF"]?>?page=1" class="a1">首頁</a> <a href="<?php echo $_SERVER["PHP_SELF"]?>?page=<?php
 if($page>1)
 echo $page-1;
 else
 echo 1;
 ?>" class="a1">上一頁</a> <a href="<?php echo $_SERVER["PHP_SELF"]?>?page=<?php
 if($page<$pagecount)
 echo $page+1;
 else
 echo $pagecount;
 ?>