PHP map()相当于解析$_POST变量到关联数组 - PHP map() equivalent to parse $_POST vars to associative array

PHP map() equivalent to parse $_POST vars to associative array

我需要解析使用jQuery动态创建的$_POST表单变量。变量有一个共同的结构，即text_id。例如:

$_POST[ 'my_app_custom_size_23' ]       = large
$_POST[ 'my_app_custom_color_23' ]      = red
$_POST[ 'my_app_custom_style_23' ]      = classic
$_POST[ 'my_app_custom_size_719' ]      = medium
$_POST[ 'my_app_custom_color_719' ]     = black
$_POST[ 'my_app_custom_style_719' ]     = modern
$_POST[ 'my_app_custom_size_501' ]      = large
$_POST[ 'my_app_custom_color_501' ]     = white
$_POST[ 'my_app_custom_style_501' ]     = classic

请注意末尾的数字标识- 23、719和501。它们需要作为关联数组中的键，例如:

$my_arr = array(
    '23' => array(
        'size'    =>  'large',
        'color'   =>  'red',
        'style'   =>  'classic'
        ),
    '719' => array(
        'size'    =>  'medium',
        'color'   =>  'black',
        'style'   =>  'modern'
        ),
    '501' => array(
        'size'    =>  'large',
        'color'   =>  'white',
        'style'   =>  'classic'
        )
    );

所以我可以引用类似的数据:

$size = $my_arr['719']['size']

每个var都以一个可预测的名称开始，以下划线和一个重要的数字id结束。

如何使用PHP完成?

一个简单的正则表达式解决方案(尽管这个正则表达式相当昂贵):

foreach ($_POST as $key => $value) {
    if (preg_match('/([^_]+)_([^_]+)$/', $key, $match)) {
        echo $my_arr[$match[2]][$match[1]];
    }
}

您可以简单地遍历数组并使用explosion()函数。

foreach ($_POST as $k => $v) {
    $keys = explode('_', $k);  // Results in Array ( [0] => my [1] => app [2] => custom [3] => size [4] => 23 ) 
    /* end($keys) would retrieve the last value i.e 23 for first one $keys[3] retrieves result like size, color etc. */
    $result[end($keys)][$keys[3]] = $v; 
}