maxdb_num_rows
(PECL)
maxdb_num_rows --
Gets the number of rows in a result
Description
Procedural style:
mixed
maxdb_num_rows ( resource result )
Object oriented style (property):
class
maxdb {
mixed num_rows
}
Returns the number of rows in the result set.
The use of maxdb_num_rows() depends on whether you use
buffered or unbuffered result sets.
In case you use unbuffered resultsets maxdb_num_rows()
will not correct the correct number of rows until all the rows in the result
have been retrieved.
返回值
Returns number of rows in the result set.
注:
If the number of rows is greater than maximal int value, the number
will be returned as a string.
Example
例子 1. Object oriented style
<?php $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); }
if ($result = $maxdb->query("SELECT cno, name FROM hotel.customer ORDER BY name")) {
/* determine number of rows result set */ $row_cnt = $result->num_rows;
printf("Result set has %d rows.\n", $row_cnt);
/* close result set */ $result->close(); }
/* close connection */ $maxdb->close(); ?>
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例子 2. Procedural style
<?php $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); }
if ($result = maxdb_query($link, "SELECT cno, name FROM hotel.customer ORDER BY name")) {
/* determine number of rows result set */ $row_cnt = maxdb_num_rows($result);
printf("Result set has %d rows.\n", $row_cnt);
/* close result set */ maxdb_free_result($result); }
/* close connection */ maxdb_close($link); ?>
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The above examples would produce the following output: