Parse error: syntax error, unexpected '$os' (T_VARIABLE) PHP Error

Question

I'm using the following code to try and print the operating system of the user:

Header:

<?php
$user_agent = getenv("HTTP_USER_AGENT");

if (strpos($user_agent, "Win") !== FALSE)
$os = "Windows"; 
else (strpos($user_agent, "Mac") !== FALSE)
$os = "Mac";
?>

Body:

<?php
if($os = "Windows")
{

}
elseif($os == "Mac")
{

} 
?>

I get the error

Parse error: syntax error, unexpected '$os' (T_VARIABLE) in C:\xampp\xamppfile\htdocs\ProjectSite\includes\identifier.php on line 7

(a) Which is line 7? (b) How do you handle the case where the $user_agent is neither Mac nor Windows? That will lead to an undefined $os, won't it? — TRiG
– TRiG, Commented Mar 11, 2014 at 11:27

Rikesh · Accepted Answer · 2014-03-11 11:22:39Z

1

You cannot have condition in else statement should use else if and also have practice of declaring your variable before using it,

$os = "";
if (strpos($user_agent, "Win") !== FALSE)
$os = "Windows"; 
else if(strpos($user_agent, "Mac") !== FALSE)
$os = "Mac";

answered Mar 11, 2014 at 11:22

Rikesh

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Osama Jetawe · Accepted Answer · 2014-03-11 11:23:31Z

0

<?php
$user_agent = getenv("HTTP_USER_AGENT");

if (strpos($user_agent, "Win") !== FALSE) {
    $os = "Windows"; 

}
else if(strpos($user_agent, "Mac") !== FALSE) {
    $os = "Mac";
}

?>

answered Mar 11, 2014 at 11:23

Osama Jetawe

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1 Comment

Our Man in Bananas Over a year ago

this is not helpful unless you add some explanation of what the questioner was doing wrong and what your proposed code does

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