Get select option value from HTML with php to disable input field - php

Question

I use select as below:
<select name="account_type" required>
<option value="">Choose Account Type</option>
<option value="1">Asset</option>
<option value="2">Bank</option>
<option value="3">Capital</option>
<option value="4">Cash</option>
<option value="5">Expense</option>
<option value="6">Income</option>
<option value="7">Liability</option>
</select>
Now I want to catch those option values using php variable, and here is the important part: I will have an input field, and based on the values I want to enable/disable that input filed.
How can I do that?

Answer 1

Using jQuery give your select an id like below
<select name="account_type" id="account" required>
<option value="">Choose Account Type</option>
<option value="1">Asset</option>
<option value="2">Bank</option>
<option value="3">Capital</option>
<option value="4">Cash</option>
<option value="5">Expense</option>
<option value="6">Income</option>
<option value="7">Liability</option>
</select>
<!--input to be disabled -->
<input type="text" id="disable">
jQuery
$('#account').on('change', function(){
if($(this).val() === '1') {
$("#disable").prop('disabled', true);
//you can also send data to PHP here using AJAX
//var data = {one: $(this).val()};
//$.post( "test.php", data, function( data ) {
//$( ".result" ).html( data );
//});
}else if($(this).val() === '2') {
//code here
}
//check for other values
});
example

Answer 2

You could do this with jQuery. If you don't know jQuery, check this out: jQuery.com
After you "installed" jQuery, you can use this in your js-File. I hope that you know how to create and use a js-File.
The next thing is to implement a good method for your select-button.
This could look like this in your js-File:
$('#my-select').change(function(){ // "#my-select" is the ID of your select. You need to implement a ID.
//do stuff here, eg.
if ($(this).val() == '5') { //check the selected option etc.
$("input").prop('disabled', true);
} else {
$("input").prop('disabled', false);
}
});
Here's a jsFiddle.
Hope this helps you.

Answer 3

html code
<select>
<option data-id="1">1</option>
<option data-id="2">2</option>
</select>
JQuery code
$(document).ready(function(){
$("select").change(function(){
var display= $("select").val();
if(display == 1){
$("select").attr("disabled", 'disabled');
}
});
});
I am not sure what you want exactly.check out this may be it will be helpful for you JSFiddle