MySQL函数操作数据库
1.select语句查询信息(实现模糊查询) <form name="form1" method="post" action=""> <input name="txt_keyword" type="text" id="txt_keyword" size="40"> <input name="Submit" type="submit" class="btn_grey" value="搜索" onclick="return check(form)"> </form> <script type="text/javascript"> function check(form){ if(form.txt_keyword.value==""){ alert("请输入查找关键字！"); form.txt_keyword.focus(); return false; } form.submit(); //提交表单 } </script> <?php $conn=mysql_connect("localhost"，"root"，"root")or die("数据库连接错误".mysql_error()); //连接数据库 mysql_select_db("testphp"，$conn)or die("数据库访问错误".mysql_error()); //选择数据库 mysql_query("set names 'utf8'"); //选择编码格式 $keyword=$_POST[txt_keyword]; //获取输入的关键词 $sql=mysql_query("select * from tb_affiche where title like '%$keyword%' or content like '%$keyword%'"); //执行查询语句 $row=mysql_fetch_object($sql); //获取查询结果集 if(!$row){ //判断查询结果集是否存在，不存在返回true echo "<font color='red'>你搜索的信息不存在！</font>"; } do{ //do...while输出查询结果 ?> <table border="1"> <tr bgcolor="#fffff"> <td width="50" height="31"><?php echo $row->title;?></td> <td width="433" height="31"><?php echo $row->content;?></td> </tr> </table> <?php }while ($row=mysql_fetch_object($sql)); mysql_free_result($sql); //关闭记录集 mysql_close($conn); // 关闭数据库连接 ?> 2.insert语句添加信息 add_affiche.php页面的代码 <form name="form1" method="post" action="check_add_affiche.php"> <table width="520" height="212" border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF"> <tr> <td width="87" align="center">公告主题：</td> <td width="433" height="31"> <input name="txt_title" type="text" id="txt_title" size="40">* </td> </tr> <tr> <td width="124" align="center">公告内容：</td> <td> <textarea name="txt_content" cols="50" rows="8" id="txt_content"></textarea> </td> </tr> <tr> <td height="40" colspan="2" align="center"> <input name="Submit" type="submit" class="btn_grey" value="保存" onclick="return check(form)"> <input name="Submit2" type="reset" value="重置"> </td> </tr> </table> </form> <script type="text/javascript"> function check(form){ if(form.txt_title.value==""){ alert("请输入公告标题！"); form.txt_title.focus(); return false; } if(form.txt_content.value==""){ alert("请输入公告内容！"); form.txt_content.focus(); return false; } form.submit(); } </script> check_add_affiche.php页面代码 <?php $conn=mysql_connect("localhost"，"root"，"root")or die("数据库连接错误".mysql_error()); mysql_select_db("testphp"，$conn)or die("数据库访问错误".mysql_error()); mysql_query("set names 'utf8'"); $title=$_POST[txt_title]; $content=$_POST[txt_content]; $createtime=date("Y-m-d H:i:s"); $sql=mysql_query("insert into tb_affiche(title，content，createtime)values('$title'，'$content'，'$createtime')"); echo "<script>alert('公告信息添加成功！');window.location.href='add_affiche.php';</script>"; mysql_free_result($sql); mysql_close($conn); ?> 3.update语句修改信息 <?php $conn=mysql_connect("localhost"，"root"，"root")or die("数据库连接错误".mysql_error()); mysql_select_db("testphp"，$conn)or die("数据库访问错误".mysql_error()); mysql_query("set names 'utf8'"); $title=$_POST[txt_title]; $content=$_POST[txt_content]; $id=$_POST[id]; $sql=mysql_query("update tb_affiche set title='$title'，content='$content'where id=$id"); if($sql){ echo "<script>alert('公告信息编辑成功！');history，back();window.location.href='modify.php?id=$id';</script>"; } else{ echo "<script>alert('公告信息编辑失败！');history，back();window.location.href='modify.php?id=$id';</script>"; } mysql_free_result($sql); mysql_close($conn); ?> 4.delete语句删除信息 <?php $conn=mysql_connect("localhost"，"root"，"root")or die("数据库连接错误".mysql_error()); mysql_select_db("testphp"，$conn)or die("数据库访问错误".mysql_error()); mysql_query("set names 'utf8'"); $id=$_POST[id]; $sql=mysql_query("delete from tb_addiche where id=$id"); if($sql){ echo "<script>alert('公告信息删除成功！');history，back();window.location.href='delete_affiche.php?id=$id';</script>"; } else{ echo "<script>alert('公告信息删除失败！');history，back();window.location.href='delete_affiche.php?id=$id';</script>"; } mysql_free_result($sql); mysql_close($conn); ?>
