How should I execute my php code using AJAX? - php

Question

I've written the conditions down in JavaScript and if it's a down arrow then I want to update the database whereas currently it's not falling into the javascript condition and updating the database at server level. Any help will be appreciated.
Code:
<script language="javascript">
$(document).ready(function() {
totalgames=<?= $totalgames ?>;
//scoress = 0;
previous_s=0;
for(xx=totalgames; xx>=1; xx--){
score_ele = 'scores'+xx;
tdid_ele = 'tdid'+xx;
var tdd = document.getElementById(tdid_ele);
var scoress = document.getElementById(score_ele);
if(previous_s == 0){
tdd.innerHTML = "<img src='images/bullet.png'/>";
}else{
if(parseFloat(previous_s) > parseFloat(scoress.value)){
tdd.innerHTML = "<img src='images/arrow_up.png'/>";
}else if(parseFloat(previous_s) < parseFloat(scoress.value)){
tdd.innerHTML = "<img src='images/arrow_down.png'/>";
<?php
//Selecting from table teams
$sql_sel_amnt = "Select * from teams where t_name='".$t_name."'";
$result_sel = $db1->getResult($sql_sel_amnt);
$row_sel = mysql_fetch_assoc($result_sel);
//Selecting from table profitnloss
$sql_pnl = "Select * from profitnloss where t_name='".$t_name."' and username='".$abc."'";
$result_pnl = $db1->getResult($sql_pnl);
$row_pnl = mysql_fetch_assoc($result_pnl);
$transact_money = $row_pnl['pnl_amount'];
$pnl_results = $row_pnl['pnl'];
$profit = 0;
$loss = 0;
$transact_money = explode("|", $transact_money);
$pnl_results = explode("|", $pnl_results);
for($i=0; $i<count($transact_money); $i++){
if($pnl_results[$i]=='P'){
$profit = $profit + $transact_money[$i];
}else{
$loss = $loss + $transact_money[$i];
}//end if
}//end for..
$money_results_total = $profit - $loss;
$pnl_date = date("d-m-Y H:i:s");
$pnl_amount = $row_sel['c_amount'];//total amount lost
$t_amount = $money_results_total + $row_pnl['t_amount'] + $pnl_amount;
$noofplayers = mysql_num_rows($result_sel)-1;//total no of players
$company_share = 17;//charity percentage
$company_share_amnt = $company_share*$pnl_amount/100;
$pnl_amount_remaining = $pnl_amount - $company_share_amnt;
$charity = substr($row_sel['charity'], 0, 2);//charity percentage
$charity_amount = $charity*$pnl_amount_remaining/100;
$sharing_amount = $pnl_amount-$charity_amount-$company_share_amnt;
$pnl_profit = round($sharing_amount/$noofplayers, 2);
echo "noofplayers=> ".$noofplayers.", company_share=> ".$company_share.", company_share_amnt=> ".$company_share_amnt.", charity=> ".$charity."%, charity_amount=> ".$charity_amount.", sharing_amount=> ".$sharing_amount.", pnl_profit=> ".$pnl_profit;
$sql_updt_loss = "UPDATE profitnloss SET game_date = '".$serial_date."', pnl_date = CONCAT(pnl_date, '$pnl_date|'), pnl_amount = CONCAT(pnl_amount, '$pnl_amount|'), pnl = CONCAT(pnl, 'Loss|'), t_amount='".$t_amount."' where username='".$abc."' and t_name='".$t_name."'";
//echo $updt_pnl;
//$result_loss = $db1->getResult($sql_updt_loss);
$sql_updt_profit = "UPDATE profitnloss SET pnl_date = CONCAT(pnl_date, '$pnl_date|'), pnl_amount = CONCAT(pnl_amount, '$pnl_profit|'), pnl = CONCAT(pnl, 'Profit|') where username not like'".$abc."' and t_name='".$t_name."'";
//echo $updt_pnl;
//$result_profit = $db1->getResult($sql_updt_profit);
?>
}else if(parseFloat(previous_s) == parseFloat(scoress.value)){
tdd.innerHTML = "<img src='images/bullet.png'/>";
}//end if
}//end if 0..
previous_s = document.getElementById(score_ele).value;
}//end for
})//emd document ready..
</script>

Answer 1

The way you should execute you PHP-code using ajax is by moving the server side code to a separate file which you call apon in the ajax-request, the url.
One example is using jQuery.
$.ajax({
type: "POST",
url: "some.php",
data: { name: "John", location: "Boston" }
}).done(function( msg ) {
alert( "Data Saved: " + msg );
});
This documentation is located here
You send the information needed to execute the PHP-code in the data. These are then accessed by $_POST or $_GET depending on which type you chose.
If you're not intending to use jQuery, you can look here: Getting Started with AJAX - Updating Form via PHP.
Here are some good practices using ajax