How does js limit the number of checkbox checks and how php acquires multiple checkbbox

This article is about how js limits the number of checkbox check boxes and how php can get multiple checkbbox. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

The first is the code that js restricts the number of checkbbox checks:

The code is as follows:

Limit the number of check box selections

Function checkDate (n) {

Var checkedCount=0

For (var iTunin) {

Alert ("cannot take more than three courses")

Return false

}

}

Please choose the courses for this semester (up to three courses):

Language

Mathematics

English

Chemistry

Physics

Politics

Then there is the method of getting the checkbbox from the php file:

The code is as follows:

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