[Trigunflame]

Eh pretty simple

PHP Code:

$html = "
    <table width='50%'>
    <tr>
        <td class='gSGRowEven'>
        Testing1
        </td>
        <td class='gSGRowOdd'>
        Testing2
        </td>
        <td class='gSGRowEven'>
        Testing3
        </td>
        <td class='gSGRowMessedup'>
        Testing4
        </td>
    </tr>
    </table>
";

$regex = '#class=[\'"]gSGRow(?:Even|Odd)[\'"]>(.+)</td>#isU';
preg_match_all($regex, $html, $matches);  
print_r($matches);