在FireFox中，我有一个无线电输入，它的值设置为字符串“false”（不确定是否与布尔值false有任何可能的区别）。
<input name="test_1" type="radio" value="false" />
当我张贴表格时，我会得到：
print_r($_POST["test_1"]);
Array
(
[test_1] =>
)
这表明浏览器将字符串“false”强制转换为布尔值false或NULL。
预期的行为是什么？
如果我特别希望返回字符串“false”，该怎么办？
我的理解是，如果选中单选按钮，则值将被POST，否则将发送一个空字符串。在您的情况下，如果单选按钮被选中，将发送“false”，否则将发送一个空字符串。
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