原生程式碼封裝好增刪改查
阿新 • • 發佈：2019-01-30
封裝好增刪改查的sql語句
1.建立一個DB.class.php
<?php //解析頭 header('content-type:text/html;charset=utf-8'); class DB{ function __construct($host,$user,$pass,$dbname){ $link=mysql_connect($host,$user,$pass); mysql_select_db($dbname,$link); mysql_query('set names utf8'); } //查詢sql function select($table,$table1,$id){ //準備查詢的sql語句 $sql="select * from $table inner join $table1 on $table.$id=$table1.$id"; //執行 $res=mysql_query($sql); //定義空陣列 $arr=array(); while($row=mysql_fetch_assoc($res)){ $arr[]=$row; } return $arr; } function all($table){ $sql="select * from $table"; //echo $sql;die; $res=mysql_query($sql); //var_dump($res);die; $arr=array(); while($row=mysql_fetch_assoc($res)){ $arr[]=$row; } //var_dump($arr);die; return $arr; } //新增sql語句 function add($table,$arr){ $str=array_values($arr); $str=implode("','",$str); $sql="insert into $table values(null,'$str')"; //echo $sql;die; $res=mysql_query($sql); if($res&&mysql_affected_rows()>0){ return true; }else{ return false; } } //刪出sql語句 function del($table,$where){ $sql="delete from $table where $where"; $res=mysql_query($sql); if($res&&mysql_affected_rows()>0){ return true; }else{ return false; } } //查詢修改語句需要查詢的語句 function update($table,$where){ $sql="select * from $table where $where"; //echo $sql;die; $res=mysql_query($sql); $row=mysql_fetch_assoc($res); //var_dump($row);die; return $row; } //改 function updateok($table,$update,$where){ $sql="update $table set $update where $where"; $res=mysql_query($sql); if($res&&mysql_affected_rows()>0){ return true; }else{ return false; } } } ?>
1.form表單頁面form.php
<?php include 'DB.class.php'; $db=new DB('127.0.0.1:3306','root','root','dongwu'); $arr=$db->all('nickname'); //var_dump($arr);die; ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <title></title> </head> <body> <center> <form action="add.php" method='post'> <table border=1> <tr> <td>請選擇暱稱:</td> <td> <select name="nid"> <?php foreach($arr as $v){?> <option value="<?php echo $v['nid'];?>"><?php echo $v['name'];?></option> <?php }?> </select> </td> </tr> <tr> <td>留言內容:</td> <td><textarea name="content" cols="20" rows="5"></textarea></td> </tr> <tr> <td><input type="submit" value='提交留言'/></td> <td></td> </tr> </table> </form> </center> </body> </html>
2.新增sql語句，直接引進DB.class.php
add.php
<?php include 'DB.class.php'; $db=new DB('127.0.0.1:3306','root','root','dongwu'); $arr=$_POST; $res=$db->add('message',$arr); if($res){ echo "<script>alert('新增成功');location.href='list.php'</script>"; }else{ echo "<script>alert('新增失敗');location.href='form.php'</script>"; } ?>
3.刪除sql語句，直接引進DB.class.php
delete.php
<?php
include 'DB.class.php';
$db=new DB('127.0.0.1:3306','root','root','dongwu');
$id=$_GET['id'];
$res=$db->del('message',"mid=$id");
if($res){
echo "<script>alert('刪除成功');location.href='list.php'</script>";
}else{
echo "<script>alert('刪除失敗');location.href='list.php'</script>";
}
?>4.顯示錶單list.php
<?php
include 'DB.class.php';
$db=new DB('127.0.0.1:3306','root','root','dongwu');
$arr=$db->select('message','nickname','nid');
?>
<center>
<table border=1>
<tr>
<th>暱稱</th>
<th>留言內容</th>
<th>操作</th>
</tr>
<?php foreach($arr as $v){?>
<tr>
<td><?php echo $v['name'];?></td>
<td><?php echo $v['content'];?></td>
<td><a href="delete.php?id=<?php echo $v['mid'];?>">刪除</a>||<a href="update.php?id=<?php echo $v['mid'];?>">修改</a></td>
</tr>
<?php }?>
</table>
</center>5.修改資料
<?php
include 'DB.class.php';
$db=new DB('127.0.0.1:3306','root','root','dongwu');
$id=$_GET['id'];
$row=$db->update('message',"mid=$id");
//var_dump($row);die;
$arr=$db->all('nickname');
?>
<center>
<form action="updateok.php?id=<?php echo $row['mid'];?>" method='post'>
<table border=1>
<tr>
<td>請選擇暱稱:</td>
<td>
<select name="nid">
<?php foreach($arr as $v){?>
<option value="<?php echo $v['nid'];?>" <?php if($row['nid']=$v['nid']){ echo 'selected';}?>><?php echo $v['name'];?></option>
<?php }?>
</select>
</td>
</tr>
<tr>
<td>留言內容:</td>
<td><textarea name="content" cols="20" rows="5"><?php echo $row['content'];?></textarea></td>
</tr>
<tr>
<td><input type="submit" value='修改留言'/></td>
<td></td>
</tr>
</table>
</form>
</center>將修改的資料調到updateok.php中
<?php
include 'DB.class.php';
$nid=$_POST['nid'];
$content=$_POST['content'];
$id=$_GET['id'];
$db=new DB('127.0.0.1:3306','root','root','dongwu');
$res=$db->updateok('message',"content='$content',nid=$nid","mid=$id");
if($res){
echo "<script>alert('修改成功');location.href='list.php'</script>";
}else{
echo "<script>alert('修改失敗');location.href='list.php'</script>";
}
?>