php 如何在php while循环中找到数组的索引
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How to find Index of an array in php while loop
提问by zzzzz
I am fetching data from MySQL database... I want to check index of each row... e.g
我正在从 MySQL 数据库中获取数据......我想检查每一行的索引......例如
while($row=mysql_fetch_array($result)
{
i want index of $row in each row... (current Index).
}
Please Help me. Thanks
请帮我。谢谢
回答by Andrei Durduc
If you want the index from the database:
如果你想要数据库中的索引：
<?php
...
$result = mysql_query("SELECT * FROM whatever");
while($row = mysql_fetch_array($result)) {
echo $row['index'];
# Where index is the field name containing the item ID from your database
}
...
?>
Or, if you want to count the number of items based on the output:
或者，如果您想根据输出计算项目数：
<?php
..
$result = mysql_query("SELECT * FROM whatever");
$index = 0;
while($row = mysql_fetch_array($result)) {
echo $index.' '.$row['whatever'];
$index++;
}
..
?>
That's what I understood from your question..
这就是我从你的问题中了解到的..
回答by ivarni
If I understood you correctly you want something like this
如果我理解正确，你想要这样的东西
<?PHP
$i=0;
while($someThingIsTrue) {
echo $i;
$i++;
}
?>
回答by Your Common Sense
$row is not a member of any array. So, it has no index at all.
And, I suppose, you don't need it either
$row 不是任何数组的成员。所以，它根本没有索引。
而且，我想，你也不需要它
