Funguo la PHP mysql_num_rows()
Muhtasari na matumizi
Funguo lahi laha linao laha laha kwa mysql_num_rows() kwa kureturna matokeo wa uadilifu wa maelezo.
语法
mysql_num_rows(data)
| 参数 | 描述 |
|---|---|
| data | 必需。结果集。该结果集从 mysql_query() 的调用中得到。 |
说明
mysql_num_rows() 返回结果集中行的数目。此命令仅对 SELECT 语句有效。要取得被 INSERT，UPDATE 或者 DELETE 查询所影响到的行的数目，用 mysql_affected_rows().
Msaada na tahadhari
Tahadhari:Ikiwa inatumiwa mysql_unbuffered_query()Inakubaliana kwamba mysql_num_rows() inaruhusiwa hadi barua zote za kufikia matokeo zote zaidi.
Mfano
<?php
$con = mysql_connect("localhost", "hello", "321");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$db_selected = mysql_select_db("test_db",$con);
$sql = "SELECT * FROM person";
$result = mysql_query($sql,$con);
echo mysql_num_rows($result);
mysql_close($con);
?>
Kichwa cha chapa kama:
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