Question

我想制作如下数组：

array(

 0 => array (   0 => array (q,a,alt),
                1 => array (q,a,alt),
                2 => array (q,a,alt)
            ),

 1 => array (   0 => array (q,a,alt),
                1 => array (q,a,alt),
                2 => array (q,a,alt)
            ),

 2 => array (   0 => array (q,a,alt),
                1 => array (q,a,alt),
                2 => array (q,a,alt)
            )

  );

我遍历了所有地方都找不到解决方案。下面是我的代码：

<?php 

$mainArray = array();

$ans = array('q', 'a', 'att');

for($i = 0; $i < 3; $i++) {
    $mainArray[$i] = array();

    for($j = 0; $j < 3; $j++) {
        $mainArray[$i][$j] = array('q','a','att');
    }
}

print_r($mainArray);

?>

我得到的是错误的东西。

下面是我的输出：

Array ( [0] => Array ( [0] => Array ( [0] => q [1] => a [2] => att ) [1] => Array ( [0] => q [1] => a [2] => att ) [2] => Array ( [0] => q [1] => a [2] => att ) ) [1] => Array ( [0] => Array ( [0] => q [1] => a [2] => att ) [1] => Array ( [0] => q [1] => a [2] => att ) [2] => Array ( [0] => q [1] => a [2] => att ) ) [2] => Array ( [0] => Array ( [0] => q [1] => a [2] => att ) [1] => Array ( [0] => q [1] => a [2] => att ) [2] => Array ( [0] => q [1] => a [2] => att ) ) )

Answer 1

实际上比您想象的要容易得多。

PHP具有一个名为array_fill的函数，该函数将创建一个从'键'到'有'值'的数组。

$ans = array('q', 'a', 'att');
$no = 3;

$arr = array_fill(0, $no, $ans);
var_dump($arr);

输出：

array(3) {
  [0]=>
  array(3) {
    [0]=>
    string(1) "q"
    [1]=>
    string(1) "a"
    [2]=>
    string(3) "att"
  }
  [1]=>
  array(3) {
    [0]=>
    string(1) "q"
    [1]=>
    string(1) "a"
    [2]=>
    string(3) "att"
  }
  [2]=>
  array(3) {
    [0]=>
    string(1) "q"
    [1]=>
    string(1) "a"
    [2]=>
    string(3) "att"
  }
}

https://3v4l.org/abRfp

在关联数组内的指定索引处插入简单数组

1 个答案: