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# mysql_num_rows

(PHP 3, PHP 4 , PHP 5)

mysql_num_rows -- Get number of rows in result

## Description

int mysql_num_rows ( resource result)

mysql_num_rows() returns the number of rows in a result set. This command is only valid for SELECT statements. To retrieve the number of rows affected by a INSERT, UPDATE or DELETE query, use mysql_affected_rows().

示範 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"; ?>`

> 備注: 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.

See also mysql_affected_rows(), mysql_connect(), mysql_data_seek(), mysql_select_db() and mysql_query().

For downward compatibility mysql_numrows() can also be used. This is deprecated however.

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