怎么隐藏下拉框的值
假设 php网站中
如果在数据库中 有1 服务类 的记录
那么下次提交表单的时候 隐藏 这条
怎么实现?
回复讨论(解决方案)
<?php$exists = array(1,2); // 这个表示从数据库中读取到已经有的记录。放到这个数组中,读数据库你自己写就可以了。?><select id="hangye" name="hangye"><option value="0">请选择</option><?if(!in_array(1, $exists)){?><option value="1">服务类</option><?}?><?if(!in_array(2, $exists)){?><option value="2">制造类</option><?}?><?if(!in_array(3, $exists)){?><option value="3">广告类</option><?}?></select>
<?php$exists = array(1,2); // 这个表示从数据库中读取到已经有的记录。放到这个数组中,读数据库你自己写就可以了。?><select id="hangye" name="hangye"><option value="0">请选择</option><?if(!in_array(1, $exists)){?><option value="1">服务类</option><?}?><?if(!in_array(2, $exists)){?><option value="2">制造类</option><?}?><?if(!in_array(3, $exists)){?><option value="3">广告类</option><?}?></select>
你好聪明啊 我怎么都没想到 in_array() 函数
但是我怎么取值不出来?
假设我的数据表是 TABLE 其中有3条信息
id uid name
1 2 张三
2 8 李四
3 9 王二
$result = mysql_query("SELECT * FROM uid",TABLE);
$row = mysql_num_rows($result);
输出$row不对
$result = mysql_query("SELECT * FROM uid",TABLE);
from uid明显有问题
改为
$uid=xxx; // 要查询的uid
$result = mysql_query("SELECT * FROM TABLE where uid='".$uid."'") or die(mysql_error());
试试
$result = mysql_query("SELECT * FROM uid",TABLE);
from uid明显有问题
改为
$uid=xxx; // 要查询的uid
$result = mysql_query("SELECT * FROM TABLE where uid='".$uid."'") or die(mysql_error());
试试
我不是要查询一条信息 不是你楼上2楼说了吗 我想用这个办法取得 所有uid的数据 输出的结果是 2,8,9 这种类型的数组
再用in_array() 判断下拉框啊
那更简单
$query = mysql_query("select uid from TABLE") or die(mysql_error());$result = array();while($thread=mysql_fetch_assoc($query)){ $result[] = $thread['uid'];}
$result里面就是已经存在的uid了。
那更简单
$query = mysql_query("select uid from TABLE") or die(mysql_error());$result = array();while($thread=mysql_fetch_assoc($query)){ $result[] = $thread['uid'];}
$result里面就是已经存在的uid了。
输出为 Array
怎么解决
那更简单
$query = mysql_query("select uid from TABLE") or die(mysql_error());$result = array();while($thread=mysql_fetch_assoc($query)){ $result[] = $thread['uid'];}
$result里面就是已经存在的uid了。
有不用 while循环 或者 while外部输出的办法吗
把$result带进$exists答案不就出来了?
把$result带进$exists答案不就出来了?
不行的
那更简单
$query = mysql_query("select uid from TABLE") or die(mysql_error());$result = array();while($thread=mysql_fetch_assoc($query)){ $result[] = $thread['uid'];}
$result里面就是已经存在的uid了。
输出为 Array
怎么解决
数组输出当然是Array
这样你应该懂了吧。
$query = mysql_query("select uid from TABLE") or die(mysql_error());$result = array();while($thread=mysql_fetch_assoc($query)){ $result[] = $thread['uid'];} ?>
那更简单
$query = mysql_query("select uid from TABLE") or die(mysql_error());$result = array();while($thread=mysql_fetch_assoc($query)){ $result[] = $thread['uid'];}
$result里面就是已经存在的uid了。
输出为 Array
怎么解决
数组输出当然是Array
这样你应该懂了吧。
$query = mysql_query("select uid from TABLE") or die(mysql_error());$result = array();while($thread=mysql_fetch_assoc($query)){ $result[] = $thread['uid'];} ?>
懂了 好了 谢谢了

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