我一直在使用一个有点借贷系统的。它产生我从这个数组中得到的每日事务。'
$trans_arr = array(
0 => array(
'2015-21-11',
'credit#50',
'debit#70'
),
1 => array(
'2015-21-11',
'credit#80',
'debit#30'
),
3 => array(
'2015-22-11',
'credit#80',
'debit#90'
),
4 => array(
'2015-22-11',
'credit#30',
'debit#80'
),
5 => array(
'2015-23-11',
'credit#65',
'debit#34'
),
);
我的目标是将这个数组重新排列成这样，相同的日期成为一个键，找到日期的匹配数组成为它的后续数组。
array(
'2015-21-11' => array(
0 => array(
'2015-21-11',
'credit#50',
'debit#70'
),
1 => array(
'2015-21-11',
'credit#80',
'debit#30'
)
),
'2015-22-11' => array(
0 =>array(
'2015-22-11',
'credit#80',
'debit#90'
),
1 => array(
'2015-22-11',
'credit#30',
'debit#80'
),
),
'2015-23-11' => array(
0 => array(
'2015-23-11',
'credit#65',
'debit#34'
)
),
)；
目前我无法按特定日期对交易进行分组。如果我可以将数组重新排列为我喜欢的数组，这将帮助我向用户显示特定日期的事务。
您只需遍历您的数组，然后在新数组中随意重新排列即可。它可能不是最快的代码，但它非常灵活且易于理解。
http://php.net/manual/en/control-structures.foreach.php
//create the array containing the newly sorted data
$trans_sorted = [];
//go through each element of our array
foreach ($trans_arr as $trans) {
//check if entry with that date exists already
//$trans[0] is the date
If (!isset($trans_sorted[$trans[0]])) {
//if it does not exist yet, initialize an empty array
$trans_sorted[$trans[0]] = [];
}
//add our transaction to this date
$trans_sorted[$trans[0]][] = $trans;
}
//print_r($trans_sorted)