好的，所以我无法找到解决问题的方法。基本上，我想要完成的是从过去一个月开始的过去十二个月的注册总数。
首先，由于我无法保证每个月都会有回报，所以我构建了一个数组并用我的查询结果填充它。我能够提取所需的所有数据，但是我无法按照您的意愿对其进行“排序”。
我希望能够以这种方式显示它，例如：
目前是10月份所以月份将如下列出：
2014年11月，2014年12月，2015年1月，2015年2月，2015年3月，2015年10月。
使用此阵列
$months = array(
'1'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'2'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'3'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'4'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'5'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'6'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'7'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'8'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'9'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'10'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'11'=>array('TOTAL'=>0, 'YEAR'=>NULL),
'12'=>array('TOTAL'=>0, 'YEAR'=>NULL)
);
用我得到的结果填充它：
key: 1 (January) total: 17 year: 2015
key: 2 (February) total: 20 year: 2015
key: 3 (March) total: 23 year: 2015
key: 4 (April) total: 29 year: 2015
key: 5 (May) total: 26 year: 2015
key: 6 (June) total: 26 year: 2015
key: 7 (July) total: 26 year: 2015
key: 8 (August) total: 24 year: 2015
key: 9 (September) total: 22 year: 2015
key: 10 (October) total: 24 year: 2015
key: 11 (November) total: 30 year: 2014
key: 12 (December) total: 42 year: 2014
这是查询/循环
$query = "SELECT MONTH(DATE_ADDED) as MONTH_NUMBER, MONTHNAME(DATE_ADDED) as MONTH_NAME, COUNT(*) as TOTAL_REGISTRATIONS, YEAR(DATE_ADDED) AS YEAR FROM MEMBERS WHERE DATE_ADDED >= (CURDATE() - INTERVAL (DAY(CURDATE()) - 1) DAY) - INTERVAL 11 MONTH GROUP BY MONTH(DATE_ADDED) ORDER BY DATE_ADDED ASC";
$result = mysql_query($query) or die(mysql_error());
while($row = mysql_fetch_assoc($result)){
$months[$row['MONTH_NUMBER']]['NAME'] = $row['MONTH_NAME'];
$months[$row['MONTH_NUMBER']]['TOTAL'] = $row['TOTAL_REGISTRATIONS'];
$months[$row['MONTH_NUMBER']]['YEAR'] = $row['YEAR'];
$months[$row['MONTH_NUMBER']]['MONTH_NUM'] = $row['MONTH_NUMBER'];
}
foreach($months as $key=>$data){
echo 'key: '.$key. ' ('.$data['NAME'].') total: '.$data['TOTAL'].' year: '.$data['YEAR'].'<br/>';
}
exit;
编辑：到目前为止，我已经能够做到这一点：
key: 12 (December) total: 42 year: 2014
key: 11 (November) total: 30 year: 2014
key: 10 (October) total: 24 year: 2015
key: 9 (September) total: 22 year: 2015
key: 8 (August) total: 24 year: 2015
key: 7 (July) total: 26 year: 2015
key: 6 (June) total: 26 year: 2015
key: 5 (May) total: 26 year: 2015
key: 4 (April) total: 29 year: 2015
key: 3 (March) total: 23 year: 2015
key: 2 (February) total: 20 year: 2015
key: 1 (January) total: 17 year: 2015
使用此代码：
function sortArray(array $a, array $b) {
if($a['YEAR'] <= $b['YEAR'] && $a['MONTH_NUM'] < $b['MONTH_NUM']){
return 1;
}elseif($a['YEAR'] <= $b['YEAR'] && $a['MONTH_NUM'] > $b['MONTH_NUM']){
return -1;
}elseif($a['YEAR'] >= $b['YEAR'] && $a['MONTH_NUM'] > $b['MONTH_NUM']){
return -1;
}elseif($a['YEAR'] >= $b['YEAR'] && $a['MONTH_NUM'] < $b['MONTH_NUM']){
return 1;
} else {
return 0;
}
}
// Sort
uasort($months, 'sortArray');
编辑：您可以看到它按年份排序，但以错误的方式列出月份。
编辑：所需的输出
key: 11 (November) total: 00 year: 2014
key: 12 (December) total: 00 year: 2014
key: 1 (January) total: 00 year: 2015
key: 2 (February) total: 00 year: 2015
key: 3 (March) total: 00 year: 2015
key: 4 (April) total: 00 year: 2015
key: 5 (May) total: 00 year: 2015
key: 6 (June) total: 00 year: 2015
key: 7 (July) total: 00 year: 2015
key: 8 (August) total: 00 year: 2015
key: 9 (September) total: 00 year: 2015
key: 10 (October) total: 00 year: 2015
最终，我将在一个条形图中显示这些内容，显示去年的每月总数。
我不知道这是否是最好的方法，欢迎任何建议。
答案 0 :(得分：1)
我认为您的答案在于“clement.hk”，在 PHP文档 uasort()功能页面上user contribution note。我已经适应了你的问题，它似乎有用了！
<?php
// array reproduction
$months = array(
'1'=>array('TOTAL'=>0, 'YEAR'=>2015),
'2'=>array('TOTAL'=>0, 'YEAR'=>2015),
'3'=>array('TOTAL'=>0, 'YEAR'=>2015),
'4'=>array('TOTAL'=>0, 'YEAR'=>2015),
'5'=>array('TOTAL'=>0, 'YEAR'=>2015),
'6'=>array('TOTAL'=>0, 'YEAR'=>2015),
'7'=>array('TOTAL'=>0, 'YEAR'=>2015),
'8'=>array('TOTAL'=>0, 'YEAR'=>2015),
'9'=>array('TOTAL'=>0, 'YEAR'=>2015),
'10'=>array('TOTAL'=>0, 'YEAR'=>2015),
'11'=>array('TOTAL'=>0, 'YEAR'=>2014),
'12'=>array('TOTAL'=>0, 'YEAR'=>2014)
);
// "clement.hk"'s alternate version of "uasort", where it keeps
// the index order when $a == $b. Credits to him!
function stable_uasort(&$array, $cmp_function) {
if(count($array) < 2) {
return;
}
$halfway = count($array) / 2;
$array1 = array_slice($array, 0, $halfway, TRUE);
$array2 = array_slice($array, $halfway, NULL, TRUE);
stable_uasort($array1, $cmp_function);
stable_uasort($array2, $cmp_function);
if(call_user_func($cmp_function, end($array1), reset($array2)) < 1) {
$array = $array1 + $array2;
return;
}
$array = array();
reset($array1);
reset($array2);
while(current($array1) && current($array2)) {
if(call_user_func($cmp_function, current($array1), current($array2)) < 1) {
$array[key($array1)] = current($array1);
next($array1);
} else {
$array[key($array2)] = current($array2);
next($array2);
}
}
while(current($array1)) {
$array[key($array1)] = current($array1);
next($array1);
}
while(current($array2)) {
$array[key($array2)] = current($array2);
next($array2);
}
return;
}
// the equal comparison is pointless since you have twelve months of the same
// year... we need comparison only when it differs
stable_uasort($months, function ($a, $b) {
/* if($a['YEAR'] == $b['YEAR']) {
return 0;
} */
return ($a['YEAR'] > $b['YEAR']) ? 1 : -1;
});
echo '<pre>';
print_r($months);
输出：
Array
(
[11] => Array
(
[TOTAL] => 0
[YEAR] => 2014
)
[12] => Array
(
[TOTAL] => 0
[YEAR] => 2014
)
[1] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[2] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[3] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[4] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[5] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[6] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[7] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[8] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[9] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
[10] => Array
(
[TOTAL] => 0
[YEAR] => 2015
)
)
似乎uasort在发出多级排序时可能会变得不稳定，而它们在具有相同值时保持数组索引顺序。 talking目前已针对小尺寸阵列（＆lt; 16）固定在PHP7上，所以如果你胆敢的话，可能值得尝试！
答案 1 :(得分：0)
你可以使用usort并在条件中添加你的逻辑。只按总价值排序的例子就是这样。
function sortFunction($item1, $item2)
{
return $item1->TOTAL - $item2->TOTAL;
}
usort($months, "sortFunction");