huge php array

[eluser]Reynolds[/eluser]
is this test code correct?
for just a hundred thousand, it result to 14,076,923.00 bytes

Code:

<?php
    
    
    $top_num = 100000; // hundred thousand
    
    if(isset($_GET['n']))
    {
        $top_num = $_GET['n'];
    }
    $t = array();
    for($i=0;$i<=$top_num;$i++) //
    {
        $t[$i][0] = "skjdahld ahsjdh a;sdjah ;dha ldah sldahdl adhal dhak djahj ahdslj hasdlkhj adlkjh aldkah lskdh adklh aldh adh";
        $t[$i][1] = "skjdahld ahsjdh a;sdjah ;dha ldah sldahdl adhal dhak djahj ahdslj hasdlkhj adlkjh aldkah lskdh adklh aldh adh";
        $t[$i][2] = "skjdahld ahsjdh a;sdjah ;dha ldah sldahdl adhal dhak djahj ahdslj hasdlkhj adlkjh aldkah lskdh adklh aldh adh";
        $t[$i][3] = "skjdahld ahsjdh a;sdjah ;dha ldah sldahdl adhal dhak djahj ahdslj hasdlkhj adlkjh aldkah lskdh adklh aldh adh";
        $t[$i][4] = "skjdahld ahsjdh a;sdjah ;dha ldah sldahdl adhal dhak djahj ahdslj hasdlkhj adlkjh aldkah lskdh adklh aldh adh";
    }
    echo number_format((memory_get_usage()/8),2) . " bytes"; // in bytes
?&gt;