如果数组键的名称中包含短划线,如何呈现数组值的值?
我有这个片段:
$snippet = "
{{ one }}
{{ four['five-six'] }}
{{ ['two-three'] }}
";
$data = [
'one' => 1,
'two-three' => '2-3',
'four' => [
'five-six' => '5-6',
],
];
$twig = new \Twig_Environment(new \Twig_Loader_String());
echo $twig->render($snippet, $data);
输出
1
5-6
Notice: Array to string conversion in path/twig/twig/lib/Twig/Environment.php(320) : eval()'d code on line 34
它使four['five-six']
变得很好。但是在['two-three']
上会抛出错误。
答案 0 :(得分:19)
这不起作用,因为你不应该在变量名中使用本机运算符--Twig内部编译为PHP,因此无法处理它。
对于属性(PHP对象的方法或属性,或PHP数组的项),有一种解决方法,from the documentation:
当属性包含特殊字符时(比如 - 那将是 解释为减号运算符),改为使用属性函数 访问变量属性:
{# equivalent to the non-working foo.data-foo #} {{ attribute(foo, 'data-foo') }}
答案 1 :(得分:6)
实际上这可行,并且有效:
$data = [
"list" => [
"one" => [
"title" => "Hello world"
],
"one-two" => [
"title" => "Hello world 2"
],
"one-three" => [
"title" => "Hello world 3"
]
]
];
$theme = new Twig_Loader_Filesystem("path_to_your_theme_directory");
$twig = new Twig_Environment($theme, array("debug" => true));
$index = "index.tmpl"; // your index template file
echo $this->twig->render($index, $data);
要在模板文件中使用片段:
{{ list["one-two"]}} - Returns: Array
{{ list["one-two"].title }} - Returns: "Hello world 2"