Call PHP Function from Url

Call PHP function from url?

One quick way is to do things like

something.com/myscript.php?f=your_function_name

then in myscript.php

if(function_exists($_GET['f'])) {
   $_GET['f']();
}

But please, for the love of all kittens, don't abuse this.

Call function and pass parameter over url PHP

It is most certainly wrong and insecure (imagine what would happen if you tried calling it with action=unlink¶m=somefile.php), but you could do something like:

With URL: http://localhost/data.php?action=myFunc¶m=123

<?php

function myFunc($param1)
{
echo $param1;
}

if(isset($_GET['action'])){
    if(function_exists($_GET['action'])) {    
        $_GET['action']($_GET['param']);
    }
}

how to call a php function from address bar?

You can check presence of GET parameter in URL and call function accordingly:

if(isset($_GET['writeMessage'])){
   writeMessage();
}

calling php function by url with no securtiy risk

You are right that the first option is extremely risky, which is why you need to validate user inputs (including GET parameters).

Your second option does exactly that. The code is not perfect but does solve that serious vulnerability.

Best (and secure) way to call javascript function (with arguments) using a url from another page

For example you can append some parameter at the end of your URL
https://your-url/?parameter=hello

When this URL is opened on another webpage you can run JavaScript or a PHP function based on that URL query.

For JavaScript

getUrlParam(slug) {
        let url = new URL(window.location);
        let params = new URLSearchParams(url.search);
        let param = params.get(slug);
        if (param) {
            return param;
        } else {
            return false;
        }
}

console.log(getUrlParam('parameter'));

How to call php function inside ajax method

Generally you will have files that contain functions/definitions and others that handle requests. (This is not necessary, just common practice)

Files that handle requests will include any relevant functions/definitions from those other files

For this case, let's use functions.php to contain your main functions and actions.php as a page to handle requests

See the below setup

// functions.php file
function get_team_members(string $team_name){
    // return a list of members based on $team_name
}

// actions.php file
include "functions.php";

$action = $_POST["action"] ?? "";
$data = null;
switch($action){
    case "get_team_members":
        $data = get_team_members($_POST["team"] ?? "");
        break;
}

echo json_encode($data);

// js file
$(document).ready(function() {
    $("#your_teams234").change(function() {

        var team = $("#your_teams234").val();
        $.ajax({
            url: 'actions.php', // update the url to request from actions.php
            method: 'post',
            data: { // update data to reflect expected data
                action: "get_team_members",
                team: team,
            },
        })
        .done(function(requests) { ... })
    })
})

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