how to a php function which does not parameters from ajax? - php

Question

I have js function to call a php function via ajax.
$("#history").click(function(){
$.ajax({
url: "./function.php",
type: "POST",
data: {"displayBookingHistory"},
dataType: "JSON",
success: function(data) {
console.log("hellosdasdasds");
$("#universalLogin").append(data);
}
});
})
and php function is
function displayBookingHistory () {
$html = " ";
....
echo json_encode($html);
}
and the call seems to be not successful, even when I try data: "displayBookingHistory",
Anyone knows solutions?

Answer 1

You have a syntax error in your JavaScript: an object needs to consist of a series of property:value pairs.
You can't call a PHP function using Ajax. Only a URL. You need to write your PHP so that it calls the function if you hit that URL.
You are completely ignoring $_POST in your PHP, so there is no reason for it to do anything with the data you are sending to it.

Answer 2

jQuery's AJAX method expects an object with key:value pairs (or a string) for the data field.
Like Quentin said you can't call PHP functions from AJAX, only complete pages. If you want to communicate "run this function" you will have to use $_POST data like this:
$("#history").click(function(){
$.ajax({
url: "./function.php",
type: "POST",
data: {function:"displayBookingHistory"},
dataType: "JSON",
success: function(data) {
console.log("hellosdasdasds");
$("#universalLogin").append(data);
}
});
})
Then in your PHP page:
if(isset($_POST["function"]){
$function = $_POST["function"];
if($function=="displayBookingHistory"){
displayBookingHistory();
}
}

Answer 3

How are you invoking that function?
May be you should have a switch statement that will check the data and call that function.
something like this
if(isset($_POST[data]){
switch($_POST[data]){
case "displayBookingHistory" :
displayBookingHistory();
break;
}
}

Answer 4

your have syntax error ajax send data.
data : {"property:value"} or data : {"property:value" , "property:value" , ...}
problem can be solved in 2 ways:
$ ("# history"). click (function () {
$ .ajax ({
url: "/function.php?action=displayBookingHistory",
type: "POST",
dataType: "JSON",
success: function (data) {
console.log ("hellosdasdasds");
$ ("# universalLogin"). append (data);
return false; //for disable a tag (link) click;
}
});
})
"action" is a parameter used for $_GET type to check php code.
Or
$ ("# history"). click (function () {
$ .ajax ({
url: "/function.php",
type: "POST",
data: {"action":"displayBookingHistory"},
dataType: "JSON",
success: function (data) {
console.log ("hellosdasdasds");
$ ("# universalLogin"). append (data);
return false; //for disable a tag (link) click;
}
});
})
"action" is a parameter used for $_POST type to check php code.
the best way is read a tag href attribute for work in javascript disable.
a tag :
linke
javascript :
$ ("# history"). click (function () {
$ .ajax ({
url: $(this).attr("href"),
type: "POST",
dataType: "JSON",
success: function (data) {
console.log ("hellosdasdasds");
$ ("# universalLogin"). append (data);
return false; //for disable a tag (link) click;
}
});
})
php code :
$action = isset($_GET["action"]) ? $_GET["action"] : "";
if($action == 'displayBookingHistory' )
displayBookingHistory();