如何在SimpleXMLElement中过去[@attributes]？

Question

目标：使用PHP / CodeIgniter，我需要在可用的数组中获取用户及其自定义字段名称和值的列表。如果我能够找到物品，我可以做我需要的。请参阅OUTPUT以及“//＆lt;＆lt;＆lt;＆lt;”的注释，以便您可以看到我被卡住了。我只是无法通过dang [@attributes]。

我正在使用PHP使用ActiveResource.php及其内置的REST API连接到Redmine。我想获得所有用户的列表，并获得下面的输出。

型号/ Employees_model.php：

<?php
require_once ('ActiveResource.php');

class Employees_model extends ActiveResource {
    var $site = 'http://user:password@localhost:8080/redmine/';
    var $element_name = 'user';
    var $request_format = 'xml';

    function __construct() {
        parent::__construct();
    }       
}
?>

控制器/ employees.php：

public function employees () {
    $employees = new Employees_model();     
    $data['employeeList'] = $employees->find('all');        
    $this->load->view('customers/ajaxEmployees', $data);
}

查看/ ajaxEmployees.php：

<?php
//I can get the following with no problem
echo $employee->id . "<br/>";
echo $employee->firstname . "<br/>";
echo $employee->lastname . "<br/>";

//This is where I'm stuck (see OUTPUT for [@attributes] and "// <<<" notes)
echo $employee->custom_fields->custom_field;
?>

输出：

Array
(
[0] => Employees_model Object
    (
        [id] => 
        [site] => http://user:password@localhost:8080/redmine/
        [element_name] => user
        [request_format] => xml
        [extra_params] => 
        [user] => 
        [password] => 
        [element_name_plural] => users
        [_data] => Array
            (
                [id] => 16
                [login] => jschmoe
                [firstname] => Joe
                [lastname] => Schmoe
                [mail] => joe@example.com
                [created_on] => 2012-08-24T01:58:21Z
                [last_login_on] => SimpleXMLElement Object
                    (
                    )
                [custom_fields] => SimpleXMLElement Object
                    (
                        [@attributes] => Array
                            (
                                [type] => array
                            )

                        [custom_field] => Array
                            (
                                [0] =>     SimpleXMLElement Object
                                    (
                                        [@attributes] => Array
                                            (
                                                [name] => Quality Control //<<< I need this
                                                [id] => 2
                                            )
                                        [value] => 1 //<<< I need this to know that QualityControl = 1
                                    )
                                [1] => SimpleXMLElement Object
                                    (
                                        [@attributes] => Array
                                            (
                                                [name] => Technical Contractor // <<< I need this
                                                [id] => 3
                                            )
                                        [value] => 0  // <<< I need this to know that TechnicalContractor = 0
                                    )
                                [2] => SimpleXMLElement Object
                                    (
                                        [@attributes] => Array
                                            (
                                                [name] => Content //<<< I need this
                                                [id] => 4
                                            )
                                        [value] => 0  // <<< I need this to know Content = 1
                                    )
                            )
                    )
            )
    )
)

非常感谢你的帮助。在浪费了几个小时搜索周围，尝试我遇到的一切以及我能想到的一切 - 我想我最好挥动我的小白旗。 ：（

Answer 1

我认为属性（）函数是您正在寻找的。例如

foreach ($employee->custom_fields->custom_field as $line) {
    echo "[" . $line->attributes()->name . "]" . $line->value . "\n";
}

此外，你可能不得不使用它：

foreach ($employee->_data->custom_fields->custom_field as $line) {

（不确定，试试两者）

Answer 2

$employee->custom_fields->custom_field;是一个数组，您可以foreach使用SimpleXMLElement::attributes()来获取每个name属性及其对应的value。

foreach ($employee->custom_fields->custom_field as $cf) {
  // Loop over the custom field nodes and read the name of each
  switch ($cf->attributes()->name) {
    // Load a variable on each matching name attribute
    // or do whatever you need with them.
    case "Quality Control":
      $quality_control = $cf->value;
      break;
    case "Technical Contractor":
      $technical_contractor = $cf->value;
      break;
    case "Content":
      $content = $cf->value;
      break;
  }
}

或者，如果您事先并不知道所需的所有内容，请将它们加载到数组中：

$employee_attrs = array();
foreach ($employee->custom_fields->custom_field as $cf) {
  // Add an array key of the name, whose value is the value
  $attrs[$cf->attributes()->name] = $cf->value;
}

var_dump($employee_attrs);