求一个简单的流程控制语句:如何判断MYSQL数据库不为空,立即结贴 while($rs=mysql_fetch_object($open)){$ifhave=1;echo "<option w_id=".$rs->w_id.">".$rs->w_name."</option>";}if(!ifhave) echo"数据库为空"; 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 $connect=mysql_connect("localhost","root","");mysql_select_db("work");$sql="select count(*) from work";$open=mysql_query($sql);$num=mysql_num_rows($open);if($num<=0){ echo"数据库为空"}else {while($rs=mysql_fetch_object($open)) { echo "<option w_id=".$rs->w_id.">".$rs->w_name."</option>";}} $connect=mysql_connect("localhost","root","");mysql_select_db("work");$sql="select * from work";$open=mysql_query($sql);$row=mysql_fetch_array($open);if(!$row[id]){ echo"数据库为空"}else {while($rs=mysql_fetch_array($open)) { echo "<option w_id=".$rs->w_id.">".$rs->w_name."</option>";}} $sql="select * from work";$open=mysql_query($sql);if(mysql_num_rows($open) < 1) echo "data is empty!";else{ while($rs=mysql_fetch_object($open)) echo "<option w_id=".$rs->w_id.">".$rs->w_name."</option>";} 累得我死去活来,原理这么简单发邮件 谁用过Paypal,着急啊! 请教4个简答题。 PHP unescape函数怎么样才能解所有语言,例如ISO-8859-1的图标就无法解开 Fso抓取问题。很懂的进 请教一个表单提交问题 谁有类似血型的测试程序,或者在哪里下载?我自己写了一个测试体重的请大家帮忙测试! 请问PHP中怎么完成asp中的response.expires=0,用什么,谢谢! 在window 2000 为什么连 MYSQL不上呢,应该怎样设置 ,急,帮帮忙 请问那个phpmyadmin是怎么用的..我已经解压了.. 新手请教php安装问题 如何操作HTML文本域的问题
mysql_select_db("work");
$sql="select count(*) from work";
$open=mysql_query($sql);
$num=mysql_num_rows($open);if($num<=0){
echo"数据库为空"
}
else
{
while($rs=mysql_fetch_object($open))
{
echo "<option w_id=".$rs->w_id.">".$rs->w_name."</option>";
}}
mysql_select_db("work");
$sql="select * from work";
$open=mysql_query($sql);
$row=mysql_fetch_array($open);
if(!$row[id]){
echo"数据库为空"
}
else
{
while($rs=mysql_fetch_array($open))
{
echo "<option w_id=".$rs->w_id.">".$rs->w_name."</option>";
}}
$open=mysql_query($sql);
if(mysql_num_rows($open) < 1)
echo "data is empty!";
else{
while($rs=mysql_fetch_object($open))
echo "<option w_id=".$rs->w_id.">".$rs->w_name."</option>";
}