mysql_num_rows 可得到查询记录数
mysql_num_rows()或者select count(*) from table;#
<?php
$con= <a class="baidu-highlight" href="https://www.baidu.com/s?wd=mysql_connect&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao" data-ke-src="https://www.baidu.com/s?wd=mysql_connect&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao" target="_blank">mysql_connect</a>(``"localhost", ``"hello", ``"321");
if(!``$con)
{
die``('Could not connect: '``. mysql_error());
}
$db_selected= <a class="baidu-highlight" href="https://www.baidu.com/s?wd=mysql_select_db&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao" data-ke-src="https://www.baidu.com/s?wd=mysql_select_db&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao" target="_blank">mysql_select_db</a>(``"test_db",``$con);
$sql= ``"SELECT * FROM person";
$result= mysql_query(``$sql,``$con);
echo<a class="baidu-highlight" href="https://www.baidu.com/s?wd=mysql_num_rows&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao" data-ke-src="https://www.baidu.com/s?wd=mysql_num_rows&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao" target="_blank">mysql_num_rows</a>(``$result);
mysql_close($con``);
?>
