Question

找到解决方案并投票

这是我的代码：

//go through each question
foreach($file_data as $value) {
    //separate the string by pipes and place in variables
    list($title, $content, $date_posted) = explode('|', $value);

    //create an associative array for each input
    $file_data_array['title'] = $title;
    $file_data_array['content'] = $content;
    $file_data_array['date_posted'] = $date_posted;

}

会发生的是，关键值会被删除。有没有办法让值附加到数组？如果没有，我怎么能这样做？

Answer 1

您可以使用以下内容附加到$file_data_array数组：

foreach($file_data as $value) {
    list($title, $content, $date_posted) = explode('|', $value);
    $item = array(
        'title' => $title, 
        'content' => $content, 
        'date_posted' => $date_posted
    );
    $file_data_array[] = $item;
}

（可以避免使用临时$item变量，同时在$file_data_array末尾执行数组声明和效果

有关更多信息，请查看手册的以下部分：Creating/modifying with square bracket syntax

Answer 2

是否要将关联数组附加到$file_data_array？

如果是这样的话：

//go through each question
foreach($file_data as $value) {
    //separate the string by pipes and place in variables
    list($title, $content, $date_posted) = explode('|', $value);

    //create an associative array for each input
    $file_data_array[] = array(
        "title" => $title,
        "content" => $content,
        "date_posted" => $date_posted,
    );

}

Answer 3

你需要一把额外的钥匙。

//go through each question
$x=0;
foreach($file_data as $value) {
    //separate the string by pipes and place in variables
    list($title, $content, $date_posted) = explode('|', $value);

    //create an associative array for each input
    $file_data_array[$x]['title'] = $title;
    $file_data_array[$x]['content'] = $content;
    $file_data_array[$x]['date_posted'] = $date_posted;
    $x++;
}

Answer 4

试试这个：

$file_data_array = array(
     'title'=>array(),
     'content'=>array(),
     'date_posted'=>array()
);
//go through each question
foreach($file_data as $value) {
    //separate the string by pipes and place in variables
    list($title, $content, $date_posted) = explode('|', $value);

    //create an associative array for each input
    $file_data_array['title'][] = $title;
    $file_data_array['content'][] = $content;
    $file_data_array['date_posted'][] = $date_posted;

}

你最终的数组看起来像：

$file_data_array = array(
   'title' => array ( 't1', 't2' ),
   'content' => array ( 'c1', 'c2' ),
   'date_posted' => array ( 'dp1', 'dp2' )
)

这是一个演示：

http://codepad.org/jdFabrzE

使用foreach向关联数组添加值？

4 个答案: