PHP variable with a value of string is not equal in PHP variable with a value of html id from javascript?

Question

This is my example code

<script>
    var item = "yooow";
    jQuery("#view").html(item);
</script>

<?php  $str_html = '<p id="view"></p>';

     echo $str_html; //it will output "yooow" 
?>

but...

when i'm trying to compare this into another php variable

<?php $str_php ="yooow";

    if($str_html == $str_php)
    {
         echo "true";
    }
    else
    {
        echo "false"; 
    }
?>

but it returns to false

how can they be an equal?

You're setting $str_html to '', not 'yooow' — James Donnelly
– James Donnelly, Commented Aug 26, 2014 at 9:08
$str_html is  and $str_php is yooow in your case. — arunrc
– arunrc, Commented Aug 26, 2014 at 9:08
PHP parses the script first. After the HTML (and Javascript_) is loaded in the browser, Jquery works — Ruben
– Ruben, Commented Aug 26, 2014 at 9:13
is there a chance to make them equal since their output is the same? — Aislinn
– Aislinn, Commented Aug 26, 2014 at 9:14

Joey Emery · Accepted Answer · 2014-08-26 09:08:28Z

2

PHP is run serverside which means it's not aware of any changes you make in the DOM using Javascript.

answered Aug 26, 2014 at 9:08

Joey Emery

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Comments

Justinas · Accepted Answer · 2014-08-26 09:13:18Z

1

<script>
var item = "yooow";

Value set only in clinet side, PHP don't know about changes here

jQuery("#view").html(item);   
</script>

<?php  $str_html = '<p id="view"></p>';

WRONG, it will output ""
echo $str_html; //it will output "yooow" ?>

<?php $str_php ="yooow";

Comparing "" and "yoow" and that is not equal!

 if($str_html == $str_php)

answered Aug 26, 2014 at 9:13

Justinas

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2 Comments

Justinas Over a year ago

@Aislinn no, you are setting #view innerHtml to "yoow". Remove JS and will see

Aislinn Over a year ago

i must not remove the JS.

Punitha Subramani · Accepted Answer · 2014-08-26 09:40:52Z

0

Better, you give the item value in cookie/session. And, compare the cookie value with $str_php.

<?php session_start(); ?>
<script>
$(document).ready(function(){
    var item = "<?php  echo $_SESSION['html']="yooow"; ?>";
    $("#view").html(item);
});
</script>
<?php  
    $str_html = '<p id="view"></p>';
    $strHtml=$_SESSION['html'];
    $str_php ="yooow";
    if($strHtml == $str_php)
    {
         echo "true";
    }
    else
    {
        echo "false"; 
    }
?>

edited Aug 26, 2014 at 9:40

answered Aug 26, 2014 at 9:23

Punitha Subramani

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3 Comments

Aislinn Over a year ago

i have another question. how can i pass a string variable from php to javascript then javascript to php ?

Déjà vu Over a year ago

@Aislinn I believe it's impossible to convert javascript to PHP. Since PHP is server side and JavaScript is client side.

Justinas Over a year ago

@Déjàvu how about ajax?

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