PHP : timezone_name_from_abbr() always return false
<p><strong>Code</strong></p>

<pre><code>$c_tme = -330;
$this-&gt;_CLIENT_T_Z = timezone_name_from_abbr("", $c_tme*-60, 1);
if( $this-&gt;_CLIENT_T_Z == FALSE ){
    $this-&gt;_CLIENT_T_Z = timezone_name_from_abbr("", $c_tme*-60, 0);
}
</code></pre>

<p>This code is working fine in local. But after uploading to server it always returns false. Is that bcoz of any coding issue ?</p>
