遍历多维（嵌套）数组

Question

我有一个像下面的数组，并想创建一个<html>表单。 我试图做到这一点，但我似乎无法弄清楚如何遍历具有我要使用的值的内部/嵌套数组。

谁能帮我吗？ 为了清楚起见，我想要一个类似html的输出：

<form method="get">
    <h2>I have</h2>
    <input type="checkbox" value="own studio">own studio<br>
    <input type="checkbox" value="mobile studio">mobile studio<br>
    <input type="checkbox" value="makeup artist">makeup artist<br>
    <h2>Customers</h2>
    <select>
        <option value="Private">Private</option>
        <option value="Business">Business</option>
    </select>
</form>

功能

<?php
function get_listing_cfs() {
global $wpdb; 
$serialized=$wpdb->get_var("SELECT meta_value FROM $wpdb->postmeta WHERE meta_key='va_form'"); 
$array=unserialize($serialized);
$source = array_filter($array, function($el) {
    return !(
            $el['props']['label'] == 'Exclude' ||
            $el['props']['label'] == 'Exclude 2'
            );
});
//echo '<pre>'.print_r($source, true).'</pre>';
$toreturn = '<form method="get">';
    foreach ($source as $key => $item) {
    $toreturn .= '<h2>'.$source[$key]['props']['label'].'</h2>';
        if ($source[$key]['type'] == 'select'){
        $toreturn .= '<select>';
        // Scan through inner loop
            foreach ($item as $value =>$data) {
               $toreturn .='<option value="'.$value['props']['options'].'">'.$value['props']['options'].'</option>';
            }
        $toreturn .='</select>';    
        }
        if ($source[$key]['type'] == 'checkbox'){
        // Scan through inner loop
            foreach ($item as $value =>$data) {
               $toreturn .='<input type="checkbox" value="'.$value['props']['options'].'">'.$value['props']['options'].'<br />';
            }
        }
    }
    $toreturn .= '</form>';
return $toreturn;
}
?>

排列

Array
(
    [0] => Array
        (
            [id] => app_i_have
            [type] => checkbox
            [props] => Array
                (
                    [required] => 0
                    [label] => I have
                    [tip] => 
                    [options] => Array
                        (
                            [0] => Array
                                (
                                    [baseline] => 0
                                    [value] => mobile studio
                                )

                            [1] => Array
                                (
                                    [baseline] => 0
                                    [value] => own studio
                                )

                            [2] => Array
                                (
                                    [baseline] => 0
                                    [value] => makeup artist
                                )

                        )

                )

        )

    [1] => Array
        (
            [id] => app_customers
            [type] => select
            [props] => Array
                (
                    [required] => 0
                    [label] => Customers
                    [tip] => 
                    [options] => Array
                        (
                            [0] => Array
                                (
                                    [baseline] => 0
                                    [value] => Private
                                )

                            [1] => Array
                                (
                                    [baseline] => 0
                                    [value] => Business
                                )

                        )

                )

        )

)

Answer 1

您根本没有考虑数据结构。

foreach ($item as $value =>$data) {
    $toreturn .='<option value="'.$value['props']['options'].'">'.$value['props']['options'].'</option>';
}

在这里， $item是

[props] => Array
    (
        [required] => 0
        [label] => I have
        [tip] => 
        [options] => Array

因此，遍历它就是遍历属性，而不是遍历值。 您想循环$item['options'] 。

总的来说，如果您不熟悉数组（PHP中的基本类型和必要类型），建议您先尝试一些入门材料，然后再尝试类似的事情。