Give the script enough time to complete the task in PHP

<?php/*www .  ja  v  a  2  s  . c o m*/

    // Give the script enough time to complete the task
    ini_set("max_execution_time", 120);

    // Define scan range
    $rangeStart = 0;
    $rangeStop = 1024;

    // Which server to scan?
    $target = "localhost";
  
    // Build an array of port values
    $range =range($rangeStart, $rangeStop);

    echo "<p>Scan results for $target</p>";

    // Execute the scan
    foreach ($range as $port) {
        $result = @fsockopen($target, $port,$errno,$errstr,1);
        if ($result) echo "<p>Socket open at port $port</p>";
    }

?>