数组转换问题

array (0 => array ( 59 => '1', 17 => '1', 23 => '2', 35 => '3', 36 => '1', 40 => '4',43 => '1,3,7', 44 => '1,2,6,9', 70 => '15345178810', ), )
上面的数组如何转换成下面的
array (0 => array ( 59 => '1', 17 => '1', 23 => '2', 35 => '3', 36 => '1', 40 => '4',  43_1 => '1',43_3 => '1',43_7 => '1', 44_1 => '1',44_2 => '1',44_6 => '1',44_9 => '1', 70 => '15345178810', ), )

回复讨论(解决方案)

$a = array (0 => array ( 59 => '1', 17 => '1', 23 => '2', 35 => '3', 36 => '1', 40 => '4',43 => '1,3,7', 44 => '1,2,6,9', 70 => '15345178810', ), );$R = array();foreach($a[0] as $k=>$v) {  if(strpos($v, ',') !== false) {    foreach(explode(',', $v) as $i) $r["{$k}_$i"] = 1;  }else $r[$k] = $v;}print_r(array($r));

Array(    [0] => Array        (            [59] => 1            [17] => 1            [23] => 2            [35] => 3            [36] => 1            [40] => 4            [43_1] => 1            [43_3] => 1            [43_7] => 1            [44_1] => 1            [44_2] => 1            [44_6] => 1            [44_9] => 1            [70] => 15345178810        ))

$a = array (0 => array ( 59 => '1', 17 => '1', 23 => '2', 35 => '3', 36 => '1', 40 => '4',43 => '1,3,7', 44 => '1,2,6,9', 70 => '15345178810', ), );$R = array();foreach($a[0] as $k=>$v) {  if(strpos($v, ',') !== false) {    foreach(explode(',', $v) as $i) $r["{$k}_$i"] = 1;  }else $r[$k] = $v;}print_r(array($r));

Array(    [0] => Array        (            [59] => 1            [17] => 1            [23] => 2            [35] => 3            [36] => 1            [40] => 4            [43_1] => 1            [43_3] => 1            [43_7] => 1            [44_1] => 1            [44_2] => 1            [44_6] => 1            [44_9] => 1            [70] => 15345178810        ))

如果$a数组$a = array (0 =>array（）1=>array().....)有多个是不是改成

$R = array();		$h=0;		foreach($arr[$h] as $k=>$v) {			if(strpos($v, ',') !== false) {				foreach(explode(',', $v) as $i) $r["{$k}_$i"] = 1;			}else $r[$k] = $v;			$h++;		}		print_r(array($r));

那需要再套一层循环