Javascript空数组和PHP中的空对象等效(Javascript empty array and empty object equivalent in PHP)

Javascript空数组和PHP中的空对象等效(Javascript empty array and empty object equivalent in PHP)

与PHP中的以下JavaScript代码相同：

[""]

和

{0 : ""}

What will be the equivalent of the following JavaScript code in PHP:

[""]

and

{0 : ""}

最满意答案

第一个是一个元素的数组，是一个空字符串的元素。 在PHP中，它是[""]或array("") 。

<?php $a = [""]; var_dump($a); // array(1) { [0]=> string(0) "" } $b = array(""); var_dump($b); // array(1) { [0]=> string(0) "" }

第二个是键0空字符串值的对象。 在PHP中，它可以表示为： (object)[""]或(object)[0 => ""] 。

<?php $a = (object)[""]; var_dump($a); // object(stdClass)#1 (1) { [0]=> string(0) "" } $b = (object)[0=>""]; var_dump($b); // object(stdClass)#2 (1) { [0]=> string(0) "" } // Also: $c = new \stdClass; $c->{0} = ""; var_dump($c); // object(stdClass)#3 (1) { ["0"]=> string(0) "" }

请阅读有关PHP数组和PHP对象的信息 。

The first one is an Array of one element, being the element an empty string. In PHP it'd be [""] or array("").

<?php $a = [""]; var_dump($a); // array(1) { [0]=> string(0) "" } $b = array(""); var_dump($b); // array(1) { [0]=> string(0) "" }

The second is an object with empty string value for key 0. In PHP it could be represented as: (object)[""] or (object)[0 => ""].

<?php $a = (object)[""]; var_dump($a); // object(stdClass)#1 (1) { [0]=> string(0) "" } $b = (object)[0=>""]; var_dump($b); // object(stdClass)#2 (1) { [0]=> string(0) "" } // Also: $c = new \stdClass; $c->{0} = ""; var_dump($c); // object(stdClass)#3 (1) { ["0"]=> string(0) "" }

Please, read about PHP Arrays and PHP Objects.