Pass PHP variable to Javascript?

[bstonehill]

I need to open a popup to the current router ip address which is extracted through php and stored in the array $gateway[1]. I can open a popup to a specific location but I do not even get a popup at all if I try to use the PHP variable as the location. Here is where I am at:



<?php

$ipconfig = shell_exec('ipconfig /all');
$explode = explode(':', $ipconfig);
$gateway = explode(" ", $explode[14]);

echo('<script type="text/javascript">);
echo("window.open(\"$gateway[1]\");");
echo('</script>');

 

[sleipnir214]

You're probably fighting getting all the interior quotes escaped right. Try the heredoc syntax for printing this kind of stuff:

<?php 
$gateway = array ('foo', 'bar', 'baz');

echo <<< EOL
window.open("$gateway[1]");
EOL;
?>

Outputs:

[tt]window.open("bar");[/tt]


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[bstonehill]

That was actually part of an IF statement. Now I get an error...

Parse error: parse error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in C:\Program Files\Abyss Web Server\htdocs\102.53.94.50\htdocs\webpass.php on line 53

which is this line:
If($_POST['password'] == Null) {}

The full php segment is:

If($_POST['password'] == 'sentrytech') {

echo <<< EOL
window.open("$router");
EOL;

}

Else {
If($_POST['password'] == Null) {}
Else {
echo('<h3>Invalid Password</h3>');
}
}

Do I still have to start a script with this method? i.e. echo "<script type='text/javascript'>";

Also would be curious to know what the "echo <<< EOL" actually does.

Thanks a lot for the help!

 

[sleipnir214]

You need to read up on people's solutions and not implement them blindly. The PHP online manual entry on heredoc has the warning:

It is very important to note that the line with the closing identifier contains no other characters, except possibly a semicolon (. That means especially that the identifier may not be indented, and there may not be any spaces or tabs after or before the semicolon.

(Emphasis from the manual)


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[bstonehill]

Thanks!