php 一些常用的语句

1：连接数据库：

<?php
 $conn = mysql_connect("localhost","root","root") or die("数据库连接失败".mysql_error());
 mysql_select_db("db_pursey",$conn) or die("数据库访问失败".mysql_error());
 mysql_query("set names gb2312");
?>

2：插入数据：

<?php
include("conn/conn.php");
$type=$_POST[type];
$title=$_POST[title];
$content=$_POST[content];
$linkman=$_POST[linkman];
$tel=$_POST[tel];
//$edate=date("Y-m-d h:i:s");获得系统日期
$edate=date("Y-m-d H:i:s");
$sql=mysql_query("insert into tb_info(type,title,content,linkman,tel,checkstate,edate) values('$type','$title','$content','$linkman','$tel',0,'$edate')");
if($sql){
 //php中输出<script>语句的方法
 echo "<script>alert('恭喜您，信息发布成功！');window.location.href='release.php';</script>";
}else{
 echo "<script>alert('对不起，信息发布失败！');history.back();</script>";
}
?>

3：查询数据

<?php
    include("conn/conn.php");
    $type=$_POST[type];
    $content=$_POST[content];
    $sql1=mysql_query("select * from tb_leaguerinfo  where checkstate=1 and type='$type' and (content like'%$content%' or title like'%$content%' or linkman like'%$content%' or tel like'%$content%')");
    $info1=mysql_fetch_array($sql1);
    $sql=mysql_query("select * from tb_info  where checkstate=1 and type='$type' and (content like'%$content%' or title like'%$content%' or linkman like'%$content%' or tel like'%$content%')");
    $info=mysql_fetch_array($sql);
?>
<?php
    if($info1){
    do{
?>
    <table width="540" border="0" cellspacing="0" cellpadding="0">
                    <tr>
                      <td height="26">『<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info1[type]);?>』&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info1[title]);?>&nbsp;&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info1[edate]);?></td>
                    </tr>
                    <tr>
                      <td height="26">&nbsp;&nbsp;&nbsp;&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info1[content]);?></td>
                    </tr>
                    <tr>
                      <td height="26">&nbsp;联系人：<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info1[linkman]);?>&nbsp;&nbsp;&nbsp;联系电话：<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info1[tel]);?></td>
                    </tr>
                    <tr>
                      <td height="3" background="Images/line1.gif"></td>
                    </tr>
                  </table>
                <?php
    }while($info1=mysql_fetch_array($sql1));
    ?>
    </td>
            </tr>
            <tr>
              <td height="140" align="center" valign="top"> <br>
    <?php
     if($info){
     do{
    ?>
                  <table width="540" border="0" cellspacing="0" cellpadding="0">
                    <tr>
                      <td height="26">『<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[type]);?>』&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[title]);?>&nbsp;&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[edate]);?></td>
                    </tr>
                    <tr>
                      <td height="26">&nbsp;&nbsp;&nbsp;&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[content]);?></td>
                    </tr>
                    <tr>
                      <td height="26">&nbsp;联系人：<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[linkman]);?>&nbsp;&nbsp;&nbsp;联系电话：<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[tel]);?></td>
                    </tr>
                    <tr>
                      <td height="3" background="Images/line1.gif"></td>
                    </tr>
                  </table>
                  <?php
     } while($info=mysql_fetch_array($sql));
     }
    }else{
    ?>
    <?php
     if($info){
     do{
    ?>
                  <table width="540" border="0" cellspacing="0" cellpadding="0">
                    <tr>
                      <td height="26">『<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[type]);?>』&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[title]);?>&nbsp;&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[edate]);?></td>
                    </tr>
                    <tr>
                      <td height="26">&nbsp;&nbsp;&nbsp;&nbsp;<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[content]);?></td>
                    </tr>
                    <tr>
                      <td height="26">&nbsp;联系人：<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[linkman]);?>&nbsp;&nbsp;&nbsp;联系电话：<?php echo str_ireplace($content,"<font color='#FF0000'>".$content."</font>",$info[tel]);?></td>
                    </tr>
                    <tr>
                      <td height="3" background="Images/line1.gif"></td>
                    </tr>
                  </table>
                  <?php
     } while($info=mysql_fetch_array($sql));
     }else{
     ?>
              <table width="540" border="0" cellspacing="0" cellpadding="0">
                    <tr>
                      <td align="center">您检索的信息资源不存在！</td>
                    </tr>
                  </table>
    <?php
     }
    }
?>