Running Out of RAM - PHP

Linux file structure contains within it a special area called /proc. Now, some believe that there's black magic in that directory. For those who know better than to fear the /proc, there awaits much good magic, in the form of server info. Looking for a way to retrieve real-time server information and display it to users in your Web application? Today's your lucky day! Take a look at the patSysinfo PHP class, which lets you do that and a whole lot more.

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By: icarus, (c) Melonfire

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February 16, 2004

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Detailed memory usage can be obtained via the very cool getMem() method, which provides data on current memory usage and available resources. Take a look:

<?php // include class include("patSysinfo.php"); // instantiate object $sys = new patSysinfo(); // get memory information $mem = $sys->getMem(); // print data print_r($mem); ? >

Here's the output:

Array
(
    [0] => Array
        (
            [type] => mem
            [total] => 123.73 MByte
            [used] => 36.02 MByte
            [free] => 87.71 MByte
            [shared] => 0.00 Byte
            [buffers] => 1.56 MByte
            [cached] => 22.25 MByte
            [percent] => 10
        )
    [1] => Array
        (
            [type] => swap
            [total] => 0.00 Byte
            [used] => 0.00 Byte
            [free] => 0.00 Byte
            [shared] => NA
            [buffers] => NA
            [cached] => NA
            [percent] => 0
        )
)

This usually looks a lot nicer when it's properly formatted into an HTML table, as in this revision of the script above:

<html> <head> </head> <body> <table border="1" cellspacing="0" cellpadding="5"> <tr> <td>Type</td> <td>Total memory</td> <td>Used memory</td> <td>Free memory</td> <td>Shared</td> <td>Buffers</td> <td>Cached</td> </tr> <?php // include class include("patSysinfo.php"); // instantiate object $sys = new patSysinfo(); // get memory information $mem = $sys->getMem(); // output memory information foreach($mem as $m) { echo "<tr>"; echo "<td>" . $m['type'] . "</td>"; echo "<td>" . $m['total'] . "</td>"; echo "<td>" . $m['used'] . "</td>"; echo "<td>" . $m['free'] . "</td>"; echo "<td>" . $m['shared'] . "</td>"; echo "<td>" . $m['buffers'] . "</td>"; echo "<td>" . $m['cached'] . "</td>"; echo "</tr>"; } ? > </body> </html>