一个php预定义变量，用于处理从SQL查询返回的多维数组

after these for example

$result = mysql_query("SELECT id, name FROM mytable")

i tried to echo back this

$row=mysql_fetch_array($results, MYSQL_ASSOC);

when i did run the query in my PHPmyadmin SQL command it came back with several lines in columns (three) from the table but when i echo back $row it give back just one line

<?php echo print_r($row); ?> 

You need to continuously call mysql_fetch_array() until it returns false, as the function returns the current row and moves the internal pointer ahead. A return value of false means you have iterated through all the rows:

while($row = mysql_fetch_array($results, MYSQL_ASSOC))
{
    // do something with $row
}