'从外部获取变量时， [英] Getting variable in a loop from outside while 'function'

问题描述

我有一个while循环将用户ID分配给一个变量。该变量是一个数组。当我在这样的链接中将变量赋值给另一个变量时：它会在点击时返回正确的ID，但只有当链接处于while循环时也是如此。如何（有可能）将链接放置在while循环之外并获取变量所保存的相同ID数据？

此代码有效：

  while（$ row = mysqli_fetch_array（$ sql））{
 $ variable = $ row ['user_id']; 
 echo< a href ='index.php？var = $ variable'>< / a>; 
} 
  

这种情况下不会出现这种情况：

PHP：

  while（$ row = mysqli_fetch_array（$ sql））{
 $ variable []。= $ row ['user_id']; 
} 
  

HTML：

<$ （$ i = 0; $ i <100; $ i ++）; p $ p>
< a href ='index.php？var = $ variable [$ i]'>< / a>


感谢您的评论..

解决方案

  while（$ row = mysqli_fetch_array（$ sql））{
 $ variable []。= $ row ['user_id']; //错误
 $ variable [] = $ row ['user_id']; //正确
} 
 
 foreach（$ variable as $ value）{
 echo< a href ='index.php？var = $ value'>< / A>中; //确保使用双引号
} 
  

I have a while loop that assigns user ID's to a variable. The variable is an array. When I assign the variable to another in a link like this: it returns proper ID's on the click but only when the link is in a while loop as well. How ( is it possible ) to place the link outside the while loop and get the same ID data the variable holds ?

This code works:

while ( $row = mysqli_fetch_array($sql)) { 
    $variable = $row['user_id'];
    echo "<a href='index.php?var=$variable'></a>";
} 

This one doesn't in this case:

PHP:

while ( $row = mysqli_fetch_array($sql)) { 
    $variable[] .= $row['user_id'];
} 

HTML:

for ($i = 0 ; $i <100 ; $i++ );
<a href='index.php?var=$variable[$i]'></a>

Thanks for comments..

解决方案

while ( $row = mysqli_fetch_array($sql)) { 
    $variable[] .= $row['user_id']; //Wrong
    $variable[] = $row['user_id']; //Correct
}

foreach($variable as $value) {
    echo "<a href='index.php?var=$value'></a>"; // Be sure to use double quotes
}

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