将PHP数组排序为列

Question

我有一个包含字段的mysql表:

名称 - 年份 - 说明

我希望按年顺序显示,但希望按十年分成列.我的PHP技能非常弱,所以我只知道如何做到这一点,我根据年份范围进行单独的查询:

<?php
echo "<div><h3>1950</h3>";
    $list1950 = mysql_query("SELECT * FROM people WHERE class_year1 > '1949' AND class_year1 < '1960' ORDER BY class_year1, last_name",$db);

    while ($thearray = mysql_fetch_array($list1950)) {
        echo "<div>$thearray[name] - $thearray[class_year1]<br />$thearray[description]</div>"; 
    }
echo "</div>";
echo "<h3>1960</h3><div>";
    $list1960 = mysql_query("SELECT * FROM people WHERE class_year1 > '1959' AND class_year1 < '1970' ORDER BY class_year1, last_name",$db);

    while ($thearray = mysql_fetch_array($list1960)) {
        echo "<div>$thearray[name] - $thearray[class_year1]<br />$thearray[description]</div>"; 
    }
echo "</div>";
?>

我知道有一种简单/更有效的方法可以做到这一点.有帮助吗？

谢谢

Answer 1

我会做这样的事情:

$list = mysql_query("SELECT * FROM people ORDER BY class_year1, last_name",$db);

$decade = false;
while ($thearray = mysql_fetch_array($list)) {

    // checks if decade is diferent, if so updates and prints it
    if( $decade != substr($thearray['class_year'], 2, 1) ) {
        // every time we change decade we print a DIV
        if($decade!==false) echo "</div>";

        $decade = substr($thearray['class_year'], 2, 1);
        echo "<div><h3>19".$decade."0</h3>";
    }

    // prints info for each row
    echo "<div>".$thearray['name']." - ".$thearray['class_year1']."<br />".$thearray['description']."</div>"; 

}

// we print another DIV in the end to close it right
echo "</div>";

通过这种方式,您可以轻松更新显示1800年和2000年的功能,而且您无需一直对其进行硬编码.

希望能帮助到你!