数据库中有数据表hacker,现在我们要将hacker表中的数据查询出来并在页面上显示,代码如下:
<?php
$mysqli = mysqli_connect("localhost","root","123",'student');
$mysqli ? print 'yes!<br>':print "no!<br>";
$sql = $mysqli -> query('use student');
$sql = $mysqli -> query('set name utf8');
$sql = $mysqli -> query("create table hacker(
id char(6) not null,
name char(8) not null,
chinese float not null,
math float not null,
english float not null
)");
if($sql == true){
echo '成功创建hacker表!<br>';
}else{
echo '创建hacker表失败!'.$mysqli->error.'<br>';
}
$sql = $mysqli -> query("insert into hacker
values('2','李四','66','77','88')
");
$rows = $mysqli->affected_rows;
if($rows == 1){
echo "添加数据成功。<br>";
}else{
echo '添加失败。'.$mysqli->error."<br>";
}
$sql = $mysqli -> query("insert into hacker
values('3','王二','55','44','33')
");
$rows = $mysqli->affected_rows;
if($rows == 1){
echo "添加数据成功。<br>";
}else{
echo '添加失败。'.$mysqli->error."<br>";
}
$sql = $mysqli -> query("insert into hacker
values('4','麻子','22','55','77')
");
$rows = $mysqli->affected_rows;
if($rows == 1){
echo "添加数据成功。<br>";
}else{
echo '添加失败。'.$mysqli->error."<br>";
}
$sql = $mysqli->query("select * from hacker");
if($sql){
$rows = $sql->num_rows;
echo '查询结果共有'.$rows.'条记录<br>';
echo "<table>
<tr>
<th>序号</th>
<th>姓名</th>
<th>语文</th>
<th>数学</th>
<th>英语</th>
<tr>
";
if($rows){
while($row = $sql->fetch_assoc()){
echo "<tr>
<td>".$row['id']."</td>
<td>".$row['name']."</td>
<td>".$row['chinese']."</td>
<td>".$row['math']."</td>
<td>".$row['english']."</td>
</tr>
";
}
echo "</table>";
}else{
echo '没有您要找的数据。<br>';
}
}else{
echo 'MySQL语句有误。<br>'.$mysqli->error.'<br>';
}
?>
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