PHP数据库的操作

<?php

$conn=mysql_connect("localhost","root","");

$result2=mysql_db_query("hello_world", "insert into hello_table values (‘add‘,8)",$conn);

$result=mysql_db_query("hello_world", "select * from hello_table",$conn);

$sss=mysql_fetch_object($result);

echo "+++++++++".$sss->age;//get the first value

$row=mysql_fetch_row($result);

for($i=0;$i<mysql_num_fields($result);$i++){

echo mysql_field_name($result, $i)." ";

}

echo "<br>";

mysql_data_seek($result, 0);

while($row=mysql_fetch_row($result)){

for($i=0;$i<mysql_num_fields($result);$i++){

echo $row[$i]." ";

}

echo "<br>";

}

mysql_free_result($result);

mysql_close($conn);

?>