php中一些常用的语句

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
}
}
?>