比如原数组是这样的
array(3) {
[0] => array(6) {
["pla_id"] => string(3) "298"
["user_id"] => string(1) "1"
["due_in"] => string(15) "8.33"
}
[1] => array(6) {
["pla_id"] => string(3) "976"
["user_id"] => string(1) "1"
["due_in"] => string(15) "338.90"
}
[2] => array(6) {
["pla_id"] => string(3) "56"
["user_id"] => string(1) "2"
["due_in"] => string(15) "25.6"
}}
因为数组中的user_id=1 是一样的
要得到最后这样数组，要怎么写(就是把user_id相同的其他元素拼接在一起)？
array(3) {
[0] => array(6) {
["pla_id"] => string(3) "298,976"
["user_id"] => string(1) "1"
["due_in"] => string(15) "8.33,338.90"
}
[1] => array(6) {
["pla_id"] => string(3) "56"
["user_id"] => string(1) "2"
["due_in"] => string(15) "25.6"
}}
$a = array( array( "pla_id" => "298", "user_id" => "1", "due_in" => "8.33", ), array( "pla_id" => "976", "user_id" => "1", "due_in" => "338.90", ), array( "pla_id" => "56", "user_id" => "2", "due_in" => "25.6", ));$b = array();foreach($a as $v) { if(! isset($b[$v['user_id']])) $b[$v['user_id']] = $v; else $b[$v['user_id']]["due_in"] .= ',' . $v["due_in"];}var_dump(array_values($b));array(2) { [0]=> array(3) { ["pla_id"]=> string(3) "298" ["user_id"]=> string(1) "1" ["due_in"]=> string(11) "8.33,338.90" } [1]=> array(3) { ["pla_id"]=> string(2) "56" ["user_id"]=> string(1) "2" ["due_in"]=> string(4) "25.6" }}
$a = array( array( "pla_id" => "298", "user_id" => "1", "due_in" => "8.33", ), array( "pla_id" => "976", "user_id" => "1", "due_in" => "338.90", ), array( "pla_id" => "56", "user_id" => "2", "due_in" => "25.6", ));$b = array();foreach($a as $v) { if(! isset($b[$v['user_id']])) $b[$v['user_id']] = $v; else $b[$v['user_id']]["due_in"] .= ',' . $v["due_in"];}var_dump(array_values($b));array(2) { [0]=> array(3) { ["pla_id"]=> string(3) "298" ["user_id"]=> string(1) "1" ["due_in"]=> string(11) "8.33,338.90" } [1]=> array(3) { ["pla_id"]=> string(2) "56" ["user_id"]=> string(1) "2" ["due_in"]=> string(4) "25.6" }}
