How to post the parameter in ajax call of jquery datatable

Just pass it like a normal jQuery ajax in POST fashion.

The structure should look like this:

ajax: { type: 'POST', url: <path>, data: { your desired data } }

Example:

var $table = $('#example').dataTable(     "processing": true,    "serverSide": true,    "bDestroy": true,    "bJQueryUI": true,    "ajax": {        'type': 'POST',        'url': 'getResult.php',        'data': {           formName: 'afscpMcn',           action: 'search',           // etc..        },    }});

In PHP, just access the POST indices as usual (just the straightforward approach):

getResult.php

$form_name = $_POST['formName'];// the rest of your values ...

DataTables manual entry

You can try this way:

$('#example').dataTable( {  "ajax": {    "url": "data.json",    "data": function ( d ) {        d.extra_search = $('#extra').val();    }  }});

https://datatables.net/reference/option/ajax.data

$("#tbl").dataTable({            oLanguage: {                sProcessing: '<div id="loader"></div>'            },            bProcessing: true,            "bServerSide": true,            "iDisplayLength": pageSize,            "sAjaxSource": " /PurchaseOrder/AddVendorItems", // url getData.php etc            "fnServerData": function ( sSource, aoData, fnCallback, oSettings ) {                aoData.push({ "name": "where", "value": ID +" AND ISNULL(IsFinal,0) = "+ ($("#chkFinal").bootstrapSwitch('state') == true ? 1 : 0) });                aoData.push({"name": "PackIDFK", "value": $("#PackIDFK").val()}) //pushing custom parameters                oSettings.jqXHR = $.ajax( {                    "dataType": 'json',                    "type": "POST",                    "url": sSource,                    "data": aoData,                    "success": fnCallback                } );            } });

This is real time example.The aoData contains all the parameters which is required on server side and you can also push your own custom parameters