CODEWITHSUNDEEP
javascriptphpjquery
phpnoob
phpnoob

Reputation: 141

How to get a variable from a php file with javascript?

What I'm trying to do is query a variable in my check.php file and pull that variable to my index.php file, compare it to a different variable, and reload the page if they don't match. This is what I have so far:

check.php:

some query
echo json_encode($checknew);

index.php:

var checkold = "<?php echo $old['ertek'];?>"; 

function checkupdates() {
  setInterval(function() {
    $.ajax({
        type: 'POST',
        url: 'check.php',
        dataType: 'json'});

        if (checkold != checknew){
            location.reload(); 
       }  
    , 3000)}
};

$( document ).ready( checkupdates );

How do I "catch" the $checknew variable from php and turn it into a variable for my function?

Upvotes: 0

Views: 83

Answers (1)

milan kyada
milan kyada

Reputation: 579

In your check.php you are echoing json_encode($checknew). Be specific what you are writing if it is only one value then you can simply write echo $checknew;.
And your JAVASCRIPT should be like this

var checkold = "<?php echo $old['ertek'];?>"; 

function checkupdates() {
  setInterval(function() {
    $.ajax({
        type: 'POST',
        url: 'check.php', 
        success:function(checknew){
          if (checkold != checknew){
            location.reload(); 
          }  
        }
    });

     },3000);
}

$( document ).ready( checkupdates() );

Upvotes: 2

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