converting Javascript variable to PHP variable in two different php file

Question

Can some body help me get the current value from this option tag to account.php as a session variable or anything ..

// loadsubcat.php This code is for dependent dropdown

$query = mysql_query("SELECT * FROM table_cmsjob WHERE VesselID= {$parent_cat}");
while($row = mysql_fetch_array($query))
    {
    echo "<option value='$row[jobName]'>$row[jobName]</option>";
    }

var javascriptVariable = $('#sub_cat').val();

I know this can be solve using ajax but I don't know how.

I will use the javascript variable as a reference for a couple of checkboxes under it but first must be passed as a php variable.

Possible duplicate of jQuery Ajax POST example with PHP

T3 H40
– T3 H40

2015-11-23 06:50:47 +00:00
Commented Nov 23, 2015 at 6:50 — T3 H40
– T3 H40, Commented Nov 23, 2015 at 6:50

Niranjan N Raju · Accepted Answer · 2015-11-23 07:24:17Z

1

you ajax will look like this,

$.ajax({
            type: 'POST',
            url: "account.php",// path to ajax file
            data: {javascriptVariable:javascriptVariable},// you can pass values here in key value pairs.
            success: function(data) {
                alert(data);

            }
        });

You can send n number of key => value pairs.

like

parent_cat:100

Next:

echo $_POST['javascriptVariable'];  // <--- grabbing ajax data here


$query = mysql_query("SELECT * FROM table_cmsjob WHERE VesselID= {$parent_cat}");
while($row = mysql_fetch_array($query))
{
echo "<option value='$row[jobName]'>$row[jobName]</option>";
}

what ever echoed in php file will come in ajax success data,

alert(data) will alert what you had echoed in php. you can use that in your html file.

edited Nov 23, 2015 at 7:24

answered Nov 23, 2015 at 7:05

Niranjan N Raju

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3 Comments

Salvador Mark Anjelo Over a year ago

hey sir may I ask if I use the code above and replace url with my page account.php and data with my javascriptvariable? can I now grab the data using either $_REQUEST or $_POST

Niranjan N Raju Over a year ago

change this line in ajax, data: javascriptVariable , to data: {javascriptVariable:javascriptVariable} ,

Niranjan N Raju Over a year ago

in php use $_POST['javascriptVariable']

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