Call PHP function on button click [duplicate]

Question

This is the PHP function, it is messy right now (redundant lines) that I will clean up after. I am stuck right now, really trying to keep the whole process to one page:

<?php function signpetitiion() {
$API_KEY = 'MYAPIKEY';
$REQUEST_URL = 'https://api.change.org/v1/petitions/get_id';
$PETITION_URL = 'https://www.change.org/p/URLTOMYPETITION';
$parameters = array(
  'api_key' => $API_KEY,
  'petition_url' => $PETITION_URL

}


?>

So this doesn't work because it is browser side:

<form onsubmit="sign_petitiion()">

How do I get this function to run with a button click? Should I convert to a JS script? if so how?

Or call with AJAX? if so how?

if(isset($_POST['go'])){

    <input type="submit" name="go" method="post">

Question closed as I was typing my answer

I know this question (in different ways) has been asked before, I had read through them but the answers were either too complicated for me (NEWB) or just a comment saying you can't.

Any ways I have found my answer,

I had to change these 2 lines

function sign_petitiion() {

to

     if(isset($_POST['go'])){

and then

<form onsubmit="sign_petitiion()">

to

    <form method="Post" class="sign" action="mypage.php">

It doesn't work that way. You can't call a PHP function from Javascript directly. You can either submit to a particular PHP page and refresh the page, or do an Ajax call to a PHP page. But you can't call a PHP function. You'd have to give your submit or Ajax call a parameter to tell what function you want the PHP page to run. — developerwjk
– developerwjk, Commented Dec 10, 2015 at 23:08
So I have been doing a lot of reading and it seems I should use Ajx? I am just a newb working on a personal webpage so its a bit over my head but Ill keep at it. Or, would it be better to convert this php function to a js script? and if so, how would I go about that? Thank you for your time. — Robert Weatherall
– Robert Weatherall, Commented Dec 12, 2015 at 16:00

Kisaragi · Accepted Answer · 2015-12-10 22:54:46Z

1

<!-- HTML-->
<a href='index.php?run=true'>Execute it </a>

//*.php
if($_Get['true']){
    signpetitiion();
}

answered Dec 10, 2015 at 22:54

Kisaragi

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3 Comments

ob_start Over a year ago

Some questions sound like: I want to drive fast around that and than up to full speed and again right and fullspeed again, but, i dont where to put the keys in. Can you help me making that key? :)

Robert Weatherall Over a year ago

Thanx for quick reply, I have tried for 2 days now, but just can't get the function to run I have tried several ways (changed to post as the page is posting) Just no luck, but I will keep trying. eg !code~ <form method="Post" class="sign" action="pet3.php?run=true"> <a href='pet3.php?run=true'>Execute it </a> <?php // if($_get['true']) // sign_petitiion(); if($_Post['true']){ sign_petitiion(); } ?>

Robert Weatherall Over a year ago

original question edited' Thank you @Kisaragi for pointing me in right direction

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