Php Code: Get Visitors Information

It is important to know your site visitors information and save them, sometimes.
This script allows you to obtain visitors IP address, operating system, web browser name and its version, and the page they come from to the current page. This script is run on a local system and the results are shown on the following image.

<!-- This Script is from www.phpfreecpde.com, Coded by: Kerixa Inc-->

<?php
	    $u_agent = $_SERVER['HTTP_USER_AGENT'];
	    $bname = 'Unknown';
	    $platform = 'Unknown';
	    $version= "";
	 
	    //First get the platform?
	    if (preg_match('/linux/i', $u_agent)) {
	        $platform = 'linux';
	    }
	    elseif (preg_match('/macintosh|mac os x/i', $u_agent)) {
	        $platform = 'mac';
	    }
	    elseif (preg_match('/windows|win32/i', $u_agent)) {
	        $platform = 'windows';
	    }
	 
	    // Next get the name of the useragent yes seperately and for good reason
	    if(preg_match('/MSIE/i',$u_agent) && !preg_match('/Opera/i',$u_agent))
	    {
	        $bname = 'Internet Explorer';
	        $ub = "MSIE";
	    }
	    elseif(preg_match('/Firefox/i',$u_agent))
	    {
	        $bname = 'Mozilla Firefox';
	        $ub = "Firefox";	        
	    }
	    elseif(preg_match('/Chrome/i',$u_agent))
	    {
	        $bname = 'Google Chrome';
	        $ub = "Chrome";
	    }
	    elseif(preg_match('/Safari/i',$u_agent))
	    {
	        $bname = 'Apple Safari';
	        $ub = "Safari";
	    }
	    elseif(preg_match('/Opera/i',$u_agent))
	    {
	        $bname = 'Opera';
	        $ub = "Opera";
	    }
	    elseif(preg_match('/Netscape/i',$u_agent))
	    {
	        $bname = 'Netscape';
	        $ub = "Netscape";
	    }
	 
	    // finally get the correct version number
	    $pos=strpos($u_agent,$ub);
	    $m=$pos+strlen($ub)+1;
	    if ($ub=='MSIE')
	    	$l=strpos($u_agent,';',$m)-$m;
	    else
		    $l=strpos($u_agent,' ',$m)-$m;
		if ($l<=0) $l=10;
		$version=substr($u_agent,$m,$l);
?>
<table style="border: 1px solid #000000;width: 600px" align="center">
	<tr>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 17pt;text-align: center;width: 298px; color: #2214B9;border-style: solid;border-width: 1px;">
		<strong>Your Information</strong></td>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 17pt;text-align: center;color: #2214B9;border-style: solid;border-width: 1px; width: 298px;">
		<strong>Value</strong></td>
	</tr>
	<tr>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; width: 298px; color: #2214B9;border-style: solid;border-width: 1px;">
		IP Address</td>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; color: #2214B9;border-style: solid;border-width: 1px; width: 298px;">
		<?php echo $_SERVER['REMOTE_ADDR']?></td>
	</tr>
	<tr>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; width: 298px; color: #2214B9;border-style: solid;border-width: 1px;">
		Operating System</td>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; color: #2214B9;border-style: solid;border-width: 1px; width: 298px;">
		<?php echo $platform ?></td>
	</tr>
	<tr>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; width: 298px; color: #2214B9;border-style: solid;border-width: 1px;">
		Web Browser Name</td>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; color: #2214B9;border-style: solid;border-width: 1px; width: 298px;">
		<?php echo $bname?></td>
	</tr>
	<tr>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; width: 298px; color: #2214B9;border-style: solid;border-width: 1px;">
		Web Browser Version</td>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; color: #2214B9;border-style: solid;border-width: 1px; width: 298px;">
		<?php echo $version ?></td>
	</tr>
	<tr>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; width: 298px; color: #2214B9;border-style: solid;border-width: 1px;">
		Page Refered to this page</td>
		<td style="font-family: 'Times New Roman', Times, serif;font-size: 15pt;text-align: left; color: #2214B9;border-style: solid;border-width: 1px; width: 298px;">
		<?php if (isset( $_SERVER["HTTP_REFERER"])) echo $_SERVER["HTTP_REFERER"]; else echo '<i>None</i>'?></td>
	</tr>
</table>

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