php中组合数组的方法

<?php

$a = [1,2,3,'a'=>1];

$b = [2,2,4,'a'=>6,'b'=>9];

$d = [1,6,7,8,'b'=>10];

$c = $a+$b+$d;

var_dump($c);

//输出

array(6) {

  [0]=> int(1)

  [1]=>int(2)

  [2]=>int(3)

  ["a"]=>int(1)

  ["b"]=>int(9)

  [3]=>int(8)

}

?>

$a = [1,2,3,'a'=>1];

$b = [2,2,4,5,'a'=>2];

$c = array_merge($a,$b);

var_dump($c);

array(8) {

  [0]=>int(1)

  [1]=> int(2)

  [2]=> int(3)

  ["a"]=> int(2)

  [3]=> int(2)

  [4]=> int(2)

  [5]=> int(4)

  [6]=> int(5)

}