PHP數組操作問題

比方說有2個數組$a和$b

$a=array("1"=>"123","2"=>"1234","3"=>"1334");


$b=array("1"=>"123,"2"=>"1230");

怎麼得到$c=array("2"=>"12234","3"=>“delete");







因為1對應的123 都是一樣 去掉了 2對應的 因為$b比$a小 所以要保留$a的 3因為不存在 所以 後面變成"delete“

回複討論(解決方案)

$a = array("1"=>"123","2"=>"1234","3"=>"1334");$b = array("1"=>"123","2"=>"1230");$c = array();foreach($a as $k=>$v) {  if(isset($b[$k])) {    if($b[$k] == $v) continue; //相同的不儲存    $c[$k] = max($b[$k], $v); //不相同保留大的  }else $c[$k] = 'delete';}print_r($c);

Array
(
[2] => 1234
[3] => delete
)

$a = array("1"=>"123","2"=>"1234","3"=>"1334");$b = array("1"=>"123","2"=>"1230");$c = array();foreach($a as $key=>$val){if(isset($b[$key])){if($val!=$b[$key]){$c[$key] = $val>$b[$key]? $val : $b[$key];}}else{$c[$key] = 'delete';}}print_r($c);

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