fbsql_num_fields
Note that this function will not always return the actual size of a result set. For example, if you are doing a two-table join along the lines of "SELECT * FROM T1,T2 where T1.x=T2.x" you will get a result of -1. This is due to the 'lazy execution' model in FrontBase whereby result rows are only returned as you request them. If you absolutely have to have the number of rows in advance then you will have to use COUNT(*) first. Most of the time you do not need to know the exact number of rows; it is good enough to know if the size of the result set is non-zero.
David Gillies
San Jose
Costa Rica
fbsql_num_rows
(PHP 4 >= 4.0.6, PHP 5)
fbsql_num_rows — دریافت تعداد ردیفهای نتیجه
Description
int fbsql_num_rows
( resource $result
)
دریافت تعداد ردیفهای مجموعه result.
این تابع تنها برای عبارات SELECT صحیح است. برای دریافت تعداد ردیفهای بازگردانده شده از INSERT، UPDATE یا DELETE، fbsql_affected_rows() را استفاده کنید.
Return Values
بازگرداندن تعداد ردیفها در آخرین عبارت SELECT.
Examples
Example #1 fbsql_num_rows() example
<?php
$link = fbsql_connect("localhost", "username", "password");
fbsql_select_db("database", $link);
$result = fbsql_query("SELECT * FROM table1;", $link);
$num_rows = fbsql_num_rows($result);
echo "$num_rows Rows\n";
?>
See Also
- fbsql_affected_rows() - Get number of affected rows in previous FrontBase operation
- fbsql_connect() - Open a connection to a FrontBase Server
- fbsql_select_db() - انتخاب پایگاه داده FrontBase
- fbsql_query() - Send a FrontBase query
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User Contributed Notes
fbsql_num_rows - [1 notes]
daggillies at yahoo dot com ¶
11 years ago