我有这个时间表，其中第一个循环来自数据库的一堆成员与while循环。在while环中有一个foreach环。然而，foreach循环使整个时间表非常缓慢，我需要一个不同的方法来解决这个问题。现在的样子
$sql = mysql_query("SELECT * FROM tblstaff ORDER BY strName ASC");
while($row = mysql_fetch_array($sql))
{
$user_id = $row['intId'];
$arr = array($one, $two, $three, $four, $five, $six, $seven);
foreach ($arr as $w) {
$week = $w;
$sql_offtime = mysql_query("SELECT tbloffwork.intId, tbloffwork.intWhoId, tbloffwork.strWeek
FROM tblstaff, tbloffwork
WHERE tbloffwork.intWhoId = '$user_id' AND tbloffwork.strWeek = '$week'");
$rwOff = mysql_fetch_array($sql_offtime);
$sql_work = mysql_query("SELECT DISTINCT tblstaff.intId as staffId, tblstaff.strName, tblworktable.intId, tblworktable.intWhoId, tblworktable.strElapsed, tblworktable.strNotes
FROM tblstaff, tblworktable
WHERE tblworktable.intWhoId = '$user_id' AND tblworktable.strElapsed = '$week'");
$rw_work = mysql_fetch_array($sql_work);
if($rwOff['strWeek'] == $week) {
$td_stat = "timetable-td-background-yellow";
} elseif($rw_work['strElapsed'] != "") {
$td_stat = "timetable-td-background-green";
} else {
$td_week = "timetable-td-background-red";
}
if($rw_work['strNotes'] != ""){
$notes = "<i class='fa fa-pencil-square-o mediumsmall'></i>";
} else { $notes = $null; }
echo "<td align='right' valign='top' id='timetable-td-small-square' class='". $td_week ."''>". $notes ."</td>";
}
}
是否有更好的方法来解决这个问题，而不是用foreach方法?
foreach生成一个集合的副本，您可以使用while代替
while (list($key, $value) = each($arr)) {
echo "Key: $key; Value: $value<br />'n";
}