PHP配列

PHP数组

Array
(
    [0] => pid=2
    [1] => action=save
    [2] => 9=a
    [3] => 10=a
    [4] => 14=a
    [5] => 20=a
    [6] => 15=a
    [7] => 15=b
    [8] => 21=a
    [9] => 21=b
    [10] => 16=c
    [11] => 16=d
    [12] => 19=c
    [13] => 19=d
    [14] => 17=we
    [15] => 22=keywork
    [16] => 18=you
    [17] => 23=thanks 
)

上面数组，如何把它转成下面样子:

Array
(
    [0] => pid=2
    [1] => action=save
    [2] => 9=a
    [3] => 10=a
    [4] => 14=a
    [5] => 20=a
    [6] => 15=ab
    [7] => 21=ab
    [8] => 16=cd
    [9] => 19=cd
    [10] => 17=we
    [11] => 22=keywork
    [12] => 18=you
    [13] => 23=thanks 
)

回复讨论(解决方案)

$a = array(  'pid=2',  'action=save',  '9=a',  '10=a',  '14=a',  '20=a',  '15=a',  '15=b',  '21=a',  '21=b',  '16=c',  '16=d',  '19=c',  '19=d',  '17=we',  '22=keywork',  '18=you',  '23=thanks',);foreach($a as $v) list($b[$v][],$v) = array_reverse(explode('=', $v));array_walk($b, create_function('&$v,$k', '$v="$k=".join("",$v);'));print_r(array_values($b));

Array(    [0] => pid=2    [1] => action=save    [2] => 9=a    [3] => 10=a    [4] => 14=a    [5] => 20=a    [6] => 15=ab    [7] => 21=ab    [8] => 16=cd    [9] => 19=cd    [10] => 17=we    [11] => 22=keywork    [12] => 18=you    [13] => 23=thanks)