Question

首先，感谢您的关注！

运行查询后，我得到如下结果：

--------------------------------------
|post_id|   meta_key   |  meta_value |
--------------------------------------
|   1   |     name     |    jeff     |
--------------------------------------
|   1   |     email    |  x@mail.com |
--------------------------------------
|   1   |     color    |     blue    |
--------------------------------------
|   2   |     name     |    mary     |
--------------------------------------
|   2   |     email    |  y@mail.com |
--------------------------------------
|   2   |     color    |     pink    |
--------------------------------------

数组

array(6) 
{ 
    [0]=> object(stdClass)#448 (3) 
        { 
            ["post_id"]     => string(1) "1" 
            ["meta_key"]    => string(4) "name" 
            ["meta_value"]  => string(4) "jeff" 
        } 
    [1]=> object(stdClass)#449 (3) 
        { 
            ["post_id"]     => string(1) "1" 
            ["meta_key"]    => string(4) "email" 
            ["meta_value"]  => string(10) "x@mail.com" 
        } 
    [2]=> object(stdClass)#450 (3) 
        { 
            ["post_id"]     => string(1) "1" 
            ["meta_key"]    => string(5) "color" 
            ["meta_value"]  => string(4) "blue" 
        } 
    [3]=> object(stdClass)#448 (3) 
        { 
            ["post_id"]     => string(1) "2" 
            ["meta_key"]    => string(4) "name" 
            ["meta_value"]  => string(4) "mary" 
        } 
    [4]=> object(stdClass)#449 (3) 
        { 
            ["post_id"]     => string(1) "2" 
            ["meta_key"]    => string(4) "email" 
            ["meta_value"]  => string(10) "y@mail.com" 
        } 
    [5]=> object(stdClass)#450 (3) 
        { 
            ["post_id"]     => string(1) "2" 
            ["meta_key"]    => string(5) "color" 
            ["meta_value"]  => string(4) "pink" 
        }

}

好吧，我有1个ID用于3个标签和3个值。使用PHP，我需要知道如何做foreach或每个打印这样的数据：

---------------------------------------------------
|post_id|    name      |    email    |   color    |
---------------------------------------------------
|   1   |    jeff      |  x@mail.com |   blue     |
---------------------------------------------------
|   2   |    mary      |  y@mail.com |   pink     |
---------------------------------------------------

现在，在Kostas Mitsarakis的帮助下，我有一个代码，但在我的例子中，这个代码返回NULL值。

代码：

global $wpdb;

$meta_value = interested_get_meta( 'interested_email' );
$results = $wpdb->get_results( 
       'SELECT post_id, meta_key, meta_value 
        FROM wp_postmeta 
        WHERE post_id 
        IN (    SELECT post_id 
                FROM wp_postmeta 
                WHERE meta_value = "'.$meta_value.'"
            )', OBJECT
);

$data = array();
$result = array($results);

foreach($result as $key => $value) {
    if (!in_array($value['post_id'], $data)) {
        $data[$value['post_id']]['post_id'] = $value['post_id'];
    }
    if ($value['meta_key'] != 'post_id') {
        $data[$value['post_id']][$value['meta_key']] =     $value['meta_value'];
    }
}

var_dump($data);

var_dump的回报：

array(1) { [""]=> array(2) { ["post_id"]=> NULL [""]=> NULL } }

Answer 1

您可以使用简单的foreach转换数组：

$output = array();
foreach ($input as $data) {
    $output[$data['id']]['id'] = $data['id'];
    $output[$data['id']][$data['label']] = $data['value'];
}

Answer 2

我同意@KostasMitsarakis在上面的评论中说这可能在sql级别上做得更好。

但是这里是您可能正在寻找的PHP代码：

<?php

$input = [
    [
        'id'    => 1,
        'name'  => 'jeff',
        'email' => 'x@mail.com',
        'color' => 'blue',
    ],
    [
        'id'    => 2,
        'name'  => 'mary',
        'email' => 'y@mail.c',
        'color' => 'pink',
    ]
];

$output = [];
foreach ($input as $entry) {
    $element = [];
    foreach($entry as $key=>$val) {
        $element[$key] = $val;
    }
    $output[] = $element;
}


var_dump($output);

这个的输出是：

array(2) {
  [0] =>
  array(4) {
    'id' =>
    int(1)
    'name' =>
    string(4) "jeff"
    'email' =>
    string(10) "x@mail.com"
    'color' =>
    string(4) "blue"
  }
  [1] =>
  array(4) {
    'id' =>
    int(2)
    'name' =>
    string(4) "mary"
    'email' =>
    string(8) "y@mail.c"
    'color' =>
    string(4) "pink"
  }
}

Answer 3

尝试使用ARRAY_A将结果作为数组。

$meta_value = interested_get_meta( 'interested_email' );
$results = $wpdb->get_results( 
       'SELECT post_id, meta_key, meta_value 
        FROM wp_postmeta 
        WHERE post_id 
        IN (    SELECT post_id 
                FROM wp_postmeta 
                WHERE meta_value = "'.$meta_value.'"
            )', ARRAY_A
);

$data = array();
$result = json_decode($results , true); //Return results as array

foreach($result as $key => $value) {
    if (!in_array($value['post_id'], $data)) {
        $data[$value['post_id']]['post_id'] = $value['post_id'];
    }
    if ($value['meta_key'] != 'post_id') {
        $data[$value['post_id']][$value['meta_key']] = $value['meta_value'];
    }
}
echo 'id name email color <br />';
foreach($data as $key => $value) {
    echo $value['post_id'].' '.$value['name'].' '.$value['email'].' '.$value['color'].'<br />';
}

var_dump($data);

结果（表格）

id name email color
1 jeff x@mail.com blue
2 mary y@mail.com pink

结果（var_dump）

array (size=2)
  1 => 
    array (size=4)
      'post_id' => int 1
      'name' => string 'jeff' (length=4)
      'email' => string 'x@mail.com' (length=10)
      'color' => string 'blue' (length=4)
  2 => 
    array (size=4)
      'post_id' => int 2
      'name' => string 'mary' (length=4)
      'email' => string 'y@mail.com' (length=10)
      'color' => string 'pink' (length=4)

Answer 4

好吧，经过几个小时和咖啡，在这里写的所有人的帮助下，我找到了解决方案。

var dataString = $('#appForm').serialize(); //alert (dataString);return false; 
$.ajax({ 
    type: "POST", 
    url: "application_form_params.php", 
    data: dataString, 
    dataType: 'json',
    success: function (data) { 
        window.location.reload(); 
        $('.register-alert').html("You have successfully registered an   applicant with rand " + data.rand); 
    } 
});

感谢所有以任何方式提供帮助的人！

PHP每个或foreach打印数据

4 个答案: