重力形式将jQuery变量转换为PHP变量动态填充

Question

I would like to pass a jQuery variable to php variable, in purpose to make a database selection. Im using gravity forms for the process, the jQuery code get the data from the drop down(2) and add it to another field(5), but i need the selected data from the dropdown to use in database selection:

SELECT Title FROM table WHERE Status= $variable

and the selected value to add to the field 5 in gravity forms.

---

    add_filter("gform_pre_render_1", "monitor_dropdown");
    function monitor_dropdown($form){

        ?>
            <script type="text/javascript">
            jQuery(document).ready(function(){

                jQuery('#input_1_2').bind('change', function()
                {
                    //get selected value from drop down;
                    var selectedValue = jQuery("#input_1_2").val();
        $.post("hold.php", {"data": selectedValue}, function (txt) {
    alert(txt);
});
                    //populate a text field with the selected drop down value
                    //jQuery("#input_1_5").val(selectedValue);
                });
            });
            </script>

        <?php
        return $form;
        }

hold.php

    add_filter( 'gform_field_value_url_data', 'populate_date' );
    function populate_date( $value) {
    $value2 = $_POST['data'];
    return $value2 ;
       }
// OR
       $value3 = $_POST['data'];
       return $value3;

Even after adding the ajax im not still what i need, is the ajax right? Or where im wrong ?

Answer 1

You can handle the Form submission in the $POST macro variable.

Your Form must look like this :

<form action="link_to_your_php" method="post">
    <input id="input_1_5" name="input_1_5" />
    <input type="submit" value="Find" />
</form>

Then you can handle the variable like this.

<?php
    $variable = $POST['input_1_5'];
?>

And then make your query

SELECT Title FROM table WHERE Status=$variable