PHP mysql_num_rows() ফাংশন
অর্থনীতি ও প্রয়োগ
mysql_num_rows() ফাংশন ফলাফলের রেকর্ডের সংখ্যা ফিরিয়ে দেয়。
Syntax
mysql_num_rows(data)
| Parameter | Description |
|---|---|
| data | Required. Result set. This result set is obtained from the mysql_query() call. |
Description
mysql_num_rows() returns the number of rows in the result set. This command is only valid for SELECT statements. To get the number of rows affected by an INSERT, UPDATE, or DELETE query, use mysql_affected_rows().
Tips and Comments
Note:If used mysql_unbuffered_query()，then mysql_num_rows() returns the correct value only after all the rows in the result set are extracted.
Example
<?php
$con = mysql_connect("localhost", "hello", "321");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$db_selected = mysql_select_db("test_db",$con);
$sql = "SELECT * FROM person";
$result = mysql_query($sql,$con);
echo mysql_num_rows($result);
mysql_close($con);
?>
Output like:
3
