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fbsql_num_rows

(PHP 4 >= 4.0.6, PHP 5)

fbsql_num_rowsدریافت 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.

Parameters

result

A result identifier returned by fbsql_query() or fbsql_db_query().

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

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User Contributed Notes 1 note

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daggillies at yahoo dot com
12 years ago
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
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