PHP selects the records from the database whose IDs exist in the array and arranges them in the order of the arrays. What to do with it

PHP selects the records from the database whose IDs exist in the array and arranges them in the order of the arrays.
For example $arr={"5", "7", 1 "", "10", "3", "8"}, to select a record from the database with an ID value of 5,7,1,10,3,8, and in this order.

------Solution--------------------

SQL Code

SELECT * FROM table WHERE ID in (5,7,1,10,3,8) ORDER by Find_in_set (ID, ' 5,7,1,10,3,8 ');
------Solution--------------------
My test results show that PHP sort speed is better than MySQL sort speed, refresh the NN only 1 times is php slow MySQL, please test it


  Date_default_timezone_set (' Asia/shanghai ');?
$link = mysql_connect (' localhost ', ' root ');
mysql_select_db (' Test ');

$timeS 1 = microtime ();
$sql = "SELECT * from ' lean ' WHERE ID in (5,7,1,10,3,8) ORDER by Find_in_set (ID, ' 5,7,1,10,3,8 ')";
for ($i = 1, $i <= 100, $++) {
$result = mysql_query ($sql);
while ($row = Mysql_fetch_array ($result))
{

}
//}
$timeE 1 = microtime ();
echo ' self-processing by the database the start and end time difference is: '. ($timeE 1-$timeS 1). '
';

Release the PHP memory first, lest the previous variables affect the efficiency
Unset ($timeS 1);
Unset ($timeS 2);
Unset ($link); The active database has been automatically set, and the current debugging does not have to pass this, so let's release it.
Unset ($sql);
Unset ($result);
Unset ($row);



//////////////////////
$timeS 2 = Microtime ();
$sql = "SELECT * from ' lean ' WHERE ID in (5,7,1,10,3,8)";
$result = mysql_query ($sql);
$data = Array ();
$i = 0;
while ($row = Mysql_fetch_array ($result))
{
$data [$row [' id ']] = $row;
$i + +;
}

$r = Sortdata ($data, Array (5,7,1,10,3,8));

$timeE 2 = Microtime ();
Echo ' Starting and ending time handled by PHP is: '. ($timeE 2-$timeS 2);

Echo '
Sort results
';
Print_r ($R);
Echo '
';

Sort function
function Sortdata ($arr, er) {
$r = Array ();
$i = 0;
foreach ($arr as $key = = $value) {
$r [er [$i]] = $value;
$i + +;
}
return $r;
}
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