PHP提交的复选框值是字符串还是布尔值？

Question

Do you guys know when you submit a form via PHP, is the form checkbox value being treated as the string "true" or boolean true? Assuming my checkbox value attribute was set to "true".

Answer 1

When you submit a checkbox, the value will be whatever you set the value attribute as, and will be a string when PHP parses the form data and populates $_REQUEST and friends.

If you don't specify a value in the form, then browsers default to "on", not "true" (this is being made standard behaviour in HTML 5).