<?php
    // Oddly, passing in any parameter into a URL causes PHP to use LESS memory...
echo memory_get_usage(true) . "<br />\n";
    $idmap = array();
    $rows2 = array("_1" => array(), "_2" => array(), "_3" => array(), "_4" => array(), "_5" => array(), "_6" => array(), "_7" => array());
    for ($x = 0; $x < 5000; $x++)
    {
        $idmap[$x] = array("test1");
        $row2 = array("A decent length string." . htmlspecialchars("A decent length string.") . "A decent length string.", $x);
        $options = array();
        $options[] = "A decent length string." . htmlspecialchars("A decent length string.") . "A decent length string.";
        $options[] = "A decent length string." . htmlspecialchars("A decent length string.") . "A decent length string.";
        $options[] = "A decent length string." . htmlspecialchars("A decent length string.") . "A decent length string.";
        $options[] = "A decent length string." . htmlspecialchars("A decent length string.") . "A decent length string.";
        $options[] = "A decent length string." . htmlspecialchars("A decent length string.") . "A decent length string.";
        $options[] = "A decent length string." . htmlspecialchars("A decent length string.") . "A decent length string.";
        $row2[] = implode(" | ", $options);

        $rows2["_6"][] = $row2;
    }

    // About 10MB RAM here with real-world data (the above is about 8MB with the test data - close enough?).
echo memory_get_usage(true) . "<br />\n";

    $rows = array();
    foreach ($rows2 as $key => $rows3)
    {
        foreach ($rows3 as $num => $row)
        {
            // This occasionally (i.e. randomly) leaks memory like crazy in here (> 128MB),
            // despite the exact same data being passed in on the URL *AND* the exact same data in $rows2.
            $row[1] = htmlspecialchars(implode(", ", $idmap[$row[1]]));
            $rows[] = $row;

            // Even weirder, adding a simple if-statement here that does absolutely nothing causes the leak to disappear...
//if ($_SERVER["REMOTE_ADDR"] != "")
//{
//}
echo memory_get_usage(true) . "<br />\n";
        }
    }

    // About 20MB RAM here with real-world data...whenever the foreach() code above doesn't run wild.
echo memory_get_usage(true) . "<br />\n";
echo "Peak: " . memory_get_peak_usage(true) . "<br />\n";
?>