Passing values from PHP into JavaScript

Question

I am trying to open a new window, with its content coming from PHP code. I need to have the value $MsgWindow passed to the: myWindow.document.write(something); statement in the JavaScript. So far I've been unsuccessful in doing it. Any suggestions?

<!DOCTYPE html>
<html>
<?php>
     $info = array($_GET["airport"],
                   $_GET["state"],
                   $_GET["distance"],
                   $_GET["price"]);
    $fin=array();
    foreach ($info as $value) {
        $value = substr($value, 2);
        $value=substr($value, 0, -2);
        array_push($fin,$value);
    }
    $airport = $fin['0'];
    $state   = $fin['1'];
    $distance= $fin['2'];
    $price   = $fin['3'];
    $MsgWindow="Your estimate to ".$airport."  ".$state. " is ".$price;
    echo $MsgWindow;
    echo "<br>";
?>
<p>Click the button to write some text in the new window and the source (parent) window.</p>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction()
{
   var myWindow = window.open("", "myWindow", "width=200, height=100");
    myWindow.document.write(something);
    myWindow.opener.document.write("<p>This is the source window!</p>");
}
</script>
</html>

Uhm myWindow.document.write("<?php echo $MsgWindow; ?>"); ? — adeneo
– adeneo, Commented Oct 21, 2015 at 21:28
This <?php> will give a PHP compilation error: remove the >. — Kenney
– Kenney, Commented Oct 21, 2015 at 21:28

Connor Lester · Accepted Answer · 2015-10-21 21:29:29Z

2

You could do the following. The variable is proccessed by php, and it appears as valid javascript code:

<script type="text/javascript">
   var php_var = "<?php echo $MsgWindow; ?>";
</script>

I would like to note that if $MsgWindow has quotes, it will break the script. You will have to use addshlashes to get around that.

answered Oct 21, 2015 at 21:29

Connor Lester

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2 Comments

Andrew Coder Over a year ago

This is the correct answer for this case. Another method would be to add text into the path URL and use JS to manipulate that url string to obtain what you want.

Yossi Minz Manor Over a year ago

RiggsFolly · Accepted Answer · 2015-10-21 21:37:57Z

Because you are building the javascript code as part of the execution of the PHP script, you can simply echo out the PHP variable where you want to use it in the javscript fragment.

Like this :

<!DOCTYPE html>
<html>
<?php
     $info = array($_GET["airport"],
                   $_GET["state"],
                   $_GET["distance"],
                   $_GET["price"]);
    $fin=array();
    foreach ($info as $value) {
        $value = substr($value, 2);
        $value=substr($value, 0, -2);
        array_push($fin,$value);
    }
    $airport = $fin['0'];
    $state   = $fin['1'];
    $distance= $fin['2'];
    $price   = $fin['3'];
    $MsgWindow="Your estimate to $airport $state is $price";
    echo $MsgWindow;
    echo "<br>";
?>
<p>Click the button to write some text in the new window and the source (parent) window.</p>

<button onclick="myFunction()">Try it</button>

<script type="text/javascript">
function myFunction()
{
   var myWindow = window.open("", "myWindow", "width=200, height=100");

       // Change here
       myWindow.document.write("<?php echo $MsgWindow; ?>");
       myWindow.opener.document.write("<p>This is the source window!</p>");
}
</script>
</html>

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