PhP访问mysql数据库的基本方式

一,查询

<?php
$conn= mysql_connect("127.0.0.1","lanou12","lanou12");
$fieldName=$_GET["name"];
if($conn)
{
mysql_select_db("Class_12_Lesson");
$sql="select ".$fieldName." from team_five;";
$result= mysql_query($sql);

$json=array();
$j=0;
while($row=mysql_fetch_array($result))
{
//dic
$item=array();
for($i=0;$i< mysql_num_fields($result);$i++)
{
$key=mysql_field_name($result, $i);
$value=$row[$key];
$item[$key]=$value;
}
//item put in json
$json[$j]=$item;
$j++;
}
echo(json_encode($json));
}
else
{
echo("connect error!");
}

mysql_close($conn);
?>

二,插入

<?php
$conn= mysql_connect("127.0.0.1","lanou12","lanou12");
if($conn)
{

mysql_select_db("Class_12_Lesson");
$sql="insert into team_five(student_name,student_age) values('lichanghong',25)";

$result= mysql_query($sql);
if($result)
{
echo("successfully...");
}
else
{
echo("insert failed".$result);
}
}
else
{
echo("connect error!");
}
mysql_close($conn);
?>