ajax - How can I get a radio attribute name by unqie ID with jQuery using regex? -

i have following input elements:

<input name="option[100]" value="first" type="radio" checked="checked"/> <input name="option[100]" value="second" type="radio" /> <input name="option[100]" value="third" type="radio"/> 

i able use

    myoption = $('input[name^=\'option\']:checked').val(); 

to value of radio button.

however, want know name id 100, how able it?

i want submit ajax array post form

 $.ajax({             url: 'product/product/add',             type: 'post',             data: { product_id: product_id,  option: myoption },             datatype: 'text', 

the php post need $myoption[100]=first;

you may element name using attr('name') , use simple regex - /\d+/:

var myoption_name = $('input[name^=\'option\']:checked').attr('name');  console.log(myoption_name.match(/\d+/)[0]);  // or  // console.log(myoption_name.replace(/^option\[(\d+)]$/, "$1"));  // or  // console.log(myoption_name.match(/^option\[(\d+)]$/)[1]);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <input name="option[100]" value="first" type="radio" checked="checked"/>  <input name="option[100]" value="second" type="radio" />  <input name="option[100]" value="third" type="radio"/>

if want make sure name follows specific pattern may use

/^option\[(\d+)]$/ 

and either use match or replace (see commented code in snippet above).

details:

• ^ - start of string
• option\[ - option[ substring
• (\d+) - group 1 capturing 1 or more digits
• ] - closing ]
• $ - end of string.