php 給一個有序數組 空的key賦值

有一個數組=>

$arr = array(        '0' => 'a value',        '1' => 'a value',        '2' => 'a value',        '4' => 'a value',        '5' => 'a value',        '7' => 'a value',        '10' => 'a value',        '11' => 'a value',        '12' => 'a value',    );

同時，我有一個

$num

假定

$num=15

此時，我想得到這個數組=>

$arr = array(        '0' => 'a value',        '1' => 'a value',        '2' => 'a value',        '3' => 'kong',        '4' => 'a value',        '5' => 'a value',        '6' => 'kong',        '7' => 'a value',        '8' => 'kong',        '9' => 'kong',        '10' => 'a value',        '11' => 'a value',        '12' => 'a value',        '13' => 'kong',        '14' => 'kong',        '15' => 'kong',    );

請問有什麼便捷、快速的方法，產生這個數組

回複討論(解決方案)

$arr = array('0' => 'a value','1' => 'a value','2' => 'a value','4' => 'a value','5' => 'a value','7' => 'a value','10' => 'a value','11' => 'a value','12' => 'a value',);$num=15;$tmp = range(0,$num);$keys = array_keys($arr);$kongArr = array_fill_keys(array_diff($tmp,$keys),'kong');//因為是數字索引，若使用 array_merge 會重新索引，不能排序foreach($kongArr as $k=>$v){$arr[$k] = $v;}ksort($arr);echo "
";print_r($arr);echo "
";/*Array(    [0] => a value    [1] => a value    [2] => a value    [3] => kong    [4] => a value    [5] => a value    [6] => kong    [7] => a value    [8] => kong    [9] => kong    [10] => a value    [11] => a value    [12] => a value    [13] => kong    [14] => kong    [15] => kong)*/

沒那麼複雜

$arr = array(  '0' => 'a value',  '1' => 'a value',  '2' => 'a value',  '4' => 'a value',  '5' => 'a value',  '7' => 'a value',  '10' => 'a value',  '11' => 'a value',  '12' => 'a value',);$num = 15;$b = $arr + array_fill(0, $num+1, 'kong');ksort($b);print_r($b);

Array(    [0] => a value    [1] => a value    [2] => a value    [3] => kong    [4] => a value    [5] => a value    [6] => kong    [7] => a value    [8] => kong    [9] => kong    [10] => a value    [11] => a value    [12] => a value    [13] => kong    [14] => kong    [15] => kong)

