How do I use Javascript in PHP?

Question

I have got PHP code to show a JavaScript button to the logged in users and it wont display anything if they are not logged in. But it only gives me a white page? The code itself is working because I've used it before but not with javascript.

<div align="center">
    <?php
        session_start();
        if (!isset($_SESSION['user'])) 
        { 
           echo "<a href=\"" target=\"_blank\"></a>"; 

        }else{
           echo"<div align="right">
                   <input type="button" onclick="document.title = 'Google';" value="Change Title to Google">";
        }
    ?>

You need to escape the double quotes in your echo. Or put the echoed string between single quotes. After that it might work. — putvande
– putvande, Commented Dec 9, 2013 at 10:15
set error_reporting to E_ALL and display_errors to true to see when things go wrong. — Maxim Khan-Magomedov
– Maxim Khan-Magomedov, Commented Dec 9, 2013 at 10:16
echo "<div align=\"right\"><input type=\"button\" onclick=\"document.title = 'Google';\" value=\"Change Title to Google\">"; — skos
– skos, Commented Dec 9, 2013 at 10:17

Krish R · Accepted Answer · 2013-12-09 10:16:36Z

3

YOUR CODE HAving ERROS with quotes, added \,

<?php
session_start();
if (!isset($_SESSION['user'])) 
{ 
   echo "<a href=\"\" target=\"_blank\"></a>"; 

}else{
        echo "<div align=\"right\">
           <input type=\"button\" onclick=\"document.title = 'Google';\" value=\"Change Title to Google\">";
   }
?>

answered Dec 9, 2013 at 10:16

Krish R

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Comments

arnaudbey · Accepted Answer · 2013-12-09 10:19:54Z

1

Another solution would be to close your php when you don't need it :

<?php
session_start();
if (!isset($_SESSION['user'])) 
{ 
?>
<a href="" target="_blank"></a>
<?php
}else{
?>
 <div align="right"> ....
<?php
}
?>

answered Dec 9, 2013 at 10:19

arnaudbey

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1 Comment

p0rsche Over a year ago

I suggest more convenient method by using another syntax: <?php if(...): ?>  <?php else: ?> <?php endif; ?>

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