How to make a checkbox inactive?

Question

PHP

I have an input with a checkbox , I need to make the checkbox inactive if the condition is true.

Answer 1

Not active means disabled .
<input type="checkbox" disabled>

Answer 2

if(your_condition_with_true) $(".my_input").attr("disabled");
More or less like this. Without your code I can't make the example clearer.

Answer 3

<input type="checkbox" id="chbx" >

if (1==1) document.getElementById('chbx').disabled = true;