在后阵列中没有正确地获得单选按钮

Question

I have block of code which is loaded while clicking a particular button through Ajax.

I have given each input a name like txtname[], country[] and also radiobtn[].

The problem is, when I am filling these 3 fields twice and selecting a radio button in the second iteration and then printing post array through print_r($_POST);

is showing the following results below:

[txtname] => Array ( [0] => xyz[1] => abc)[country] => Array ( [0] => India[1] => United Kingdom ) [radiobtn] => Array ( [0] => true )

It shouldn't show like:

[txtname] => Array ( [0] => xyz[1] => abc)[country] => Array ( [0] => India[1] => United Kingdom ) [radiobtn] => Array ( [0] => ""[1] => true)

So how to go about knowing which iteration radio button is selected? Any help appreciated.

HTML

<input type="radio"  name="radiobtn[]" value="true">
<input  type="text" name="txtname[]" >
   <select name="country[]"> 
<option value="country" selected="selected">Select Country</option> 
<option value="United States" >India </option> 
<option value="United Kingdom">United Kingdom</option> 
   </select>

Answer 1

You are expecting two values from radiobtn which is of type radio. The radio button type is supposed to force the selection of only one item, therefore the radiobtn[] array you are trying to populate will always contain only one value, which is true. And that is correctly shown by the result:

[radiobtn] => Array ( [0] => true )

Your radiobtn[] array is overwritten at each iteration, leading to only the last result being stored in the $_POST global variable. Therefore the [] in radiobtn[] is pointless since there will never be more than one value.

For multiple selections you may want to take a look at type="checkbox" which can store multiple values for the same name. An example would be:

<input type="checkbox" name="btn[]" value="A">A</input>
<input type="checkbox" name="btn[]" value="B">B</input>
<input type="checkbox" name="btn[]" value="C">C</input>