PHP向数组中添加另一项

Question

我想从html表单向数组中添加新元素，但我不知道如何使用此结构将新元素添加到主数组中我尝试过array_push，但失败了

$menu = array(
               "1" => array (
                               "title" => 'Glowna',
                               "page"  => 'home', 
                               "url"   => "index.php",
                                ),
               "2" => array (
                               "title" => "Cennik",
                               "page"  => 'services',
                               "url"   => "index.php"            
                                       ),                                      
               "3" => array (
                               "title" => 'Portfolio',
                               "page"  => 'portfolio',
                               "url"   => "index.php"           
                                       ),
               "4" => array (
                               "title" => 'O nas',
                               "page"  => 'about',
                               "url"   => "index.php"               
                                       ),                      
               "5" => array (
                               "title" => 'Kontakt',
                               "page"  => 'contact',
                               "url"   => "index.php"             
                                       )
);
?>

Answer 1

您将需要定义一个键，它很可能是"6"，然后提供一个数组作为值。您的代码可能如下所示：

$menu['6'] = array( 'title' => "Archives",
                    'page'  => "archives",
                    'url'   => "archives.php");

非那样做不行。

Answer 2

您的$menu数组被称为关联数组，因为它具有键的字符串值。

对于关联数组，不能使用array_push。

你能做的是

$menu["key"] = array("title" => 'Kontakt',"page" => 'contact',"url" => "index.php")

但是查看您的数组，您可以使用数字索引而不是字符串。如果使用以下结构，则可以使用array_push

$menu = array(array ("title" => 'Glowna',
                     "page"  => 'home', 
                     "url"   => "index.php"),
              array ( "title" => "Cennik",
                      "page"  => 'services',
                      "url"   => "index.php"))

注意删除了“字符串键”(例如："1" => array())，

现在你可以使用array_push了；

array_push($menu, array("title" => "Cennik", "page"  => 'services', "url"   => "index.php"))

Answer 3

我试着用你的例子做array_push，它工作得很好，有什么问题吗？

考虑到下面其他人所说的，如果字符串键是数字的，php似乎仍然可以识别它们，因为即使数组键是数字字符串，数组推送也可以很好地工作。他们所说的，，，可能适用于真正的字符串，或者不是数字顺序的键。

$menu = array(
        "1" => array (
                        "title" => 'Glowna',
                        "page"  => 'home', 
                        "url"   => "index.php",
                         ),
        "2" => array (
                        "title" => "Cennik",
                        "page"  => 'services',
                        "url"   => "index.php"            
                                ),                                      
        "3" => array (
                        "title" => 'Portfolio',
                        "page"  => 'portfolio',
                        "url"   => "index.php"           
                                ),
        "4" => array (
                        "title" => 'O nas',
                        "page"  => 'about',
                        "url"   => "index.php"               
                                ),                      
        "5" => array (
                        "title" => 'Kontakt',
                        "page"  => 'contact',
                        "url"   => "index.php"             
                                )
);

array_push($menu, array("title" => 'number 6', "page"  => 'something', "url"   => "works.php"));

var_export($menu);

结果：

array (
  1 => 
  array (
    'title' => 'Glowna',
    'page' => 'home',
    'url' => 'index.php',
  ),
  2 => 
  array (
    'title' => 'Cennik',
    'page' => 'services',
    'url' => 'index.php',
  ),
  3 => 
  array (
    'title' => 'Portfolio',
    'page' => 'portfolio',
    'url' => 'index.php',
  ),
  4 => 
  array (
    'title' => 'O nas',
    'page' => 'about',
    'url' => 'index.php',
  ),
  5 => 
  array (
    'title' => 'Kontakt',
    'page' => 'contact',
    'url' => 'index.php',
  ),
  6 => 
  array (
    'title' => 'number 6',
    'page' => 'something',
    'url' => 'works.php',
  ),
)

现场演示：http://sandbox.onlinephpfunctions.com/code/76d5dab43255459455f2e80e37ab281486009fc4