php method to return query results: 1. Use the mysql_result function to obtain data; 2. Use the mysql_fetch_row function to obtain data and return the query results in the form of an array; 3. Use the mysql_fetch_array function to obtain data, etc. .
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Analysis of four types of query return results in PHP development
1.
The code is as follows:
<?php
$connection=mysql_connect("localhost","root","password"); //连接并选择数据库服务器
mysql_select_db("test",$connection);
$query="insert into users(user_name)"; //在test数据库里插入一条数据
$query.="values('tuxiaohui')";
$result=mysql_query($query);
if(!$query)
echo "insert data failed!<br>";
else{
$query="select * from users"; //查询数据
$result=mysql_query($query,$connection);
for($rows_count=0;$rows_count<7;$rows_count++) //用mysql_result获得数据并输出，mysql_result() 返回 MySQL 结果集中一个单元的内容。
{
echo "用户ID：".mysql_result($result,$rows_count,"user_id")."<br>";
echo "用户名：".mysql_result($result,$rows_count,"user_name")."<br>";
}
}
?>2.
The code is as follows:
<?php
$connection=mysql_connect("localhost","root","password"); //连接并选择数据库服务器
mysql_select_db("test",$connection);
$query="select * from users";
$result=mysql_query($query,$connection);
while($row=mysql_fetch_row($result))
{
echo "用户ID：".$row[0]."<br>";
echo "用户名：".$row[1]."<br>";
}
?>3.
The code is as follows:
<?php
$connection=mysql_connect("localhost","root","password"); //连接并选择数据库服务器
mysql_select_db("test",$connection);
$query="select * from users";
$result=mysql_query($query,$connection);
while($row=mysql_fetch_array($result))
{
echo "用户ID：".$row[0]."<br>"; //也可以写做$row["user_id"]
echo "用户名：".$row[1]."<br>"; //也可以写做$row["user_name"]
}
?>4.
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