mysql_num_rows
(PHP 4, PHP 5, PECL mysql:1.0)
mysql_num_rows — Get number of rows in result
說明
int mysql_num_rows
( resource $result
)
Retrieves the number of rows from a result set. This command is only valid for statements like SELECT or SHOW that return an actual result set. To retrieve the number of rows affected by a INSERT, UPDATE, REPLACE or DELETE query, use mysql_affected_rows().
Return值
The number of rows in a result set on success, or FALSE on failure.
範例
Example#1 mysql_num_rows() example
<?php
$link = mysql_connect("localhost", "mysql_user", "mysql_password");
mysql_select_db("database", $link);
$result = mysql_query("SELECT * FROM table1", $link);
$num_rows = mysql_num_rows($result);
echo "$num_rows Rows\n";
?>
註釋
Note: If you use mysql_unbuffered_query(), mysql_num_rows() will not return the correct value until all the rows in the result set have been retrieved.
Note: 為了保證向下相容性，可以使用下面的別名，但不贊成使用它： mysql_numrows()