如何从PHP中的复杂数组中提取数据？

发布于 2024-10-06 18:48:04 字数 758 浏览 0 评论 0原文

我正在以以下形式创建帖子：

while ( $tracks = mysql_fetch_array($trackstring) ){
    $tracks = mysql_fetch_array($trackstring) ){
echo "<li class="tracklist">
<input type="text" name="tracknum-[$tracks['song_id']]" 
value="".$tracks['song_tracknumber']"/> 
<input type="text" name="trackname[$tracks['song_id']]" 
value="".$tracks['song_title'].""/> 
</li>";
    }

它正在创建一个看起来像这样的 $_POST 数组：

Array ( [tracknum] => Array ( [13] => 1 [14] => 2 [15] => 3 ) [trackname] => Array ( [13] => One Beat [14] => Faraway [15] => Oh! )

本质上我想要
1 - 一拍即可进入 id=13 2 - 遥远地进入 id=14

我可以看到那里的所有数据，但我不太确定如何操作它......我对数组不太热衷。如何使用涉及 id 值的 $_POST['??????'] 引用这些

原文

I am creating the post in the following form:

while ( $tracks = mysql_fetch_array($trackstring) ){
    $tracks = mysql_fetch_array($trackstring) ){
echo "<li class="tracklist">
<input type="text" name="tracknum-[$tracks['song_id']]" 
value="".$tracks['song_tracknumber']"/> 
<input type="text" name="trackname[$tracks['song_id']]" 
value="".$tracks['song_title'].""/> 
</li>";
    }

it's creating a $_POST array that looks like this:

Array ( [tracknum] => Array ( [13] => 1 [14] => 2 [15] => 3 ) [trackname] => Array ( [13] => One Beat [14] => Faraway [15] => Oh! )

essentially I want
1 - One Beat to go into id=13
2 - Faraway to go into id=14

I can see all the data there, but I'm not really sure how to manipulate it... I'm not so hot with arrays. How do I reference these with $_POST['????'] involving the id values

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蓬勃野心 2024-10-13 18:48:05

用于

$_POST['trackname'][13]

获得“One Beat”。

use

$_POST['trackname'][13]

to get "One Beat".

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胡大本事 2024-10-13 18:48:05

尝试使用

print_r($_POST);

这将为您的 POST 提供清晰的缩进，以便您可以轻松地浏览它。

然后，如果您仍然需要帮助，请编辑您的问题，使其听起来更清晰。

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宣告ˉ结束 2024-10-13 18:48:05

非常感谢 sitepoint 论坛上的 cranial-bore :)

$tracknum = $_POST['tracknum'];
$trackname = $_POST['trackname'];
if(count($tracknum) == count($trackname)){ // make sure both the array have same elements
    foreach($tracknum as $songid=>$tracknumber){
        $song_tracknumber = $tracknum[$songid];
        $song_title = $trackname[$songid];
        $sql = "UPDATE songs SET song_tracknumber='$song_tracknumber', song_title='$song_title' WHERE song_id=$songid";
    }
}

big thanks to cranial-bore at the sitepoint forums :)

$tracknum = $_POST['tracknum'];
$trackname = $_POST['trackname'];
if(count($tracknum) == count($trackname)){ // make sure both the array have same elements
    foreach($tracknum as $songid=>$tracknumber){
        $song_tracknumber = $tracknum[$songid];
        $song_title = $trackname[$songid];
        $sql = "UPDATE songs SET song_tracknumber='$song_tracknumber', song_title='$song_title' WHERE song_id=$songid";
    }
}

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