array ( 0 => array ( 'cust_no' => '237109s92b', 'hi_no' => 'mec38-431', 'arr_time' => '30/03/2014 9:00', 'totals' => 15, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 1, 'c_type' => 'd22', ), 1 => array ( 'cust_no' => '237109s92b', 'hi_no' => 'mec38-431', 'arr_time' => '30/03/2014 9:00', 'totals' => 15, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 1, 'c_type' => 'd22', ), 2 => array ( 'cust_no' => '237033aw0a', 'hi_no' => 'bem330-500', 'arr_time' => '30/03/2014 19:00', 'totals' => 15, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 1, 'c_type' => 'x11m', ), 3 => array ( 'cust_no' => '237033aw0a', 'hi_no' => 'bem330-500', 'arr_time' => '30/03/2014 19:00', 'totals' => 45, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 3, 'c_type' => 'x11m', ), 4 => array ( 'cust_no' => '237033aw0a', 'hi_no' => 'bem330-500', 'arr_time' => '30/03/2014 19:00', 'totals' => 45, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 3, 'c_type' => 'x11m', ), 5 => array ( 'cust_no' => '237033aw0a', 'hi_no' => 'bem330-500', 'arr_time' => '1/04/2014 19:00', 'totals' => 45, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 3, 'c_type' => 'x11m', ),)
条件：当arr_time和c_type,snp都相同时，把条件相同的数组合并为新的二维数组，并设定日期形式yyyy-mm-dd_$i为其序号。变成例如
array ( 0 => array ( 'no'=> '2014-04-08_1', 'cust_no' => '237109s92b', 'hi_no' => 'mec38-431', 'arr_time' => '30/03/2014 9:00', 'totals' => 15, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 1, 'c_type' => 'd22', ), 1 => array ( 'no'=> '2014-04-08_1', 'cust_no' => '237109s92b', 'hi_no' => 'mec38-431', 'arr_time' => '30/03/2014 9:00', 'totals' => 15, 'ch_date' => '26/03/2014 0:00', 'snp' => 15, 'mount' => 1, 'c_type' => 'd22', ),)
请问怎么求解？
回复讨论(解决方案) $res = array();foreach($ar as $t) { $k = join('_', array($t['arr_time'], $t['c_type'], $t['snp'])); $res[$k][] = $t;}print_r($res);
得 array( [30/03/2014 9:00_d22_15] => array ( [0] => array ( [cust_no] => 237109s92b [hi_no] => mec38-431 [arr_time] => 30/03/2014 9:00 [totals] => 15 [ch_date] => 26/03/2014 0:00 [snp] => 15 [mount] => 1 [c_type] => d22 ) [1] => array ( [cust_no] => 237109s92b [hi_no] => mec38-431 [arr_time] => 30/03/2014 9:00 [totals] => 15 [ch_date] => 26/03/2014 0:00 [snp] => 15 [mount] => 1 [c_type] => d22 ) ) [30/03/2014 19:00_x11m_15] => array ( [0] => array ( [cust_no] => 237033aw0a [hi_no] => bem330-500 [arr_time] => 30/03/2014 19:00 [totals] => 15 [ch_date] => 26/03/2014 0:00 [snp] => 15 [mount] => 1 [c_type] => x11m ) [1] => array ( [cust_no] => 237033aw0a [hi_no] => bem330-500 [arr_time] => 30/03/2014 19:00 [totals] => 45 [ch_date] => 26/03/2014 0:00 [snp] => 15 [mount] => 3 [c_type] => x11m ) [2] => array ( [cust_no] => 237033aw0a [hi_no] => bem330-500 [arr_time] => 30/03/2014 19:00 [totals] => 45 [ch_date] => 26/03/2014 0:00 [snp] => 15 [mount] => 3 [c_type] => x11m ) ) [1/04/2014 19:00_x11m_15] => array ( [0] => array ( [cust_no] => 237033aw0a [hi_no] => bem330-500 [arr_time] => 1/04/2014 19:00 [totals] => 45 [ch_date] => 26/03/2014 0:00 [snp] => 15 [mount] => 3 [c_type] => x11m ) ))
接下来该怎么做，你应该会的