PHP四维数组、三维数组封装遍历

傷城~ 2023-03-06 08:14 17阅读 0赞

<?php
    
    header("Content-type: text/html; charset=utf-8");
    $gold = [];
    $m_array = array();
    $all_gold = array();
    // 1维数组
    $m_date1 = array(
        'price' => '279',
        'product' => '金条',
        'shop' => '老庙',
    );
    $m_date2 = array(
        'price' => '322',
        'product' => '金条',
        'shop' => '老凤祥',
    );
    $m_date3 = array(
        'price' => '299',
        'product' => '黄金',
        'shop' => '老庙',
    );
    $m_date4 = array(
        'price' => '300',
        'product' => '金条',
        'shop' => '六福',
    );
    $m_date5 = array(
        'price' => '299',
        'product' => '黄金',
        'shop' => '老凤祥',
    );
    // 组装2维数组
    array_push($m_array, $m_date1, $m_date2, $m_date3, $m_date4, $m_date5);
    echo '二维数组：',"\n";
    var_dump($m_array);
    
    // 组装3维数组；
    for ($i = 0; $i < count($m_array); $i++) { 
        if (array_key_exists($m_array[$i]['shop'], $gold)) { 
            // echo "该数组中包含了'key'";
            array_push($gold[$m_array[$i]['shop']], $m_array[$i]);
        } else { 
            $gold[$m_array[$i]['shop']][0] = $m_array[$i];
        }
    }
    echo "三维数组：","\n";
    var_dump($gold);
    // 定义一个3维数组
    $pt = array(
        '六福' =>
            array(
    
                'price' => '310',
                'product' => 'pt999',
                'shop' => '六福',
    
            ),
        '老凤祥' =>
            array(
                array(
                    'price' => '300',
                    'product' => 'pt995',
                    'shop' => '老凤祥',
                ),
                array(
                    'price' => 'pt',
                    'product' => '黄金',
                    'shop' => '老凤祥',
                )
            )
    );
    // 组装成4维数组
    $all_gold = array(
        'pt' => $pt,
        'gold' => $gold
    );
    echo "四维数组：","\n";
    var_dump($all_gold);
    ?>

测试运行：

二维数组：
    array(5) {
      [0]=>
      array(3) {
        ["price"]=>
        string(3) "279"
        ["product"]=>
        string(6) "金条"
        ["shop"]=>
        string(6) "老庙"
      }
      [1]=>
      array(3) {
        ["price"]=>
        string(3) "322"
        ["product"]=>
        string(6) "金条"
        ["shop"]=>
        string(9) "老凤祥"
      }
      [2]=>
      array(3) {
        ["price"]=>
        string(3) "299"
        ["product"]=>
        string(6) "黄金"
        ["shop"]=>
        string(6) "老庙"
      }
      [3]=>
      array(3) {
        ["price"]=>
        string(3) "300"
        ["product"]=>
        string(6) "金条"
        ["shop"]=>
        string(6) "六福"
      }
      [4]=>
      array(3) {
        ["price"]=>
        string(3) "299"
        ["product"]=>
        string(6) "黄金"
        ["shop"]=>
        string(9) "老凤祥"
      }
    }
    三维数组：
    array(3) {
      ["老庙"]=>
      array(2) {
        [0]=>
        array(3) {
          ["price"]=>
          string(3) "279"
          ["product"]=>
          string(6) "金条"
          ["shop"]=>
          string(6) "老庙"
        }
        [1]=>
        array(3) {
          ["price"]=>
          string(3) "299"
          ["product"]=>
          string(6) "黄金"
          ["shop"]=>
          string(6) "老庙"
        }
      }
      ["老凤祥"]=>
      array(2) {
        [0]=>
        array(3) {
          ["price"]=>
          string(3) "322"
          ["product"]=>
          string(6) "金条"
          ["shop"]=>
          string(9) "老凤祥"
        }
        [1]=>
        array(3) {
          ["price"]=>
          string(3) "299"
          ["product"]=>
          string(6) "黄金"
          ["shop"]=>
          string(9) "老凤祥"
        }
      }
      ["六福"]=>
      array(1) {
        [0]=>
        array(3) {
          ["price"]=>
          string(3) "300"
          ["product"]=>
          string(6) "金条"
          ["shop"]=>
          string(6) "六福"
        }
      }
    }
    四维数组：
    array(2) {
      ["pt"]=>
      array(2) {
        ["六福"]=>
        array(3) {
          ["price"]=>
          string(3) "310"
          ["product"]=>
          string(5) "pt999"
          ["shop"]=>
          string(6) "六福"
        }
        ["老凤祥"]=>
        array(2) {
          [0]=>
          array(3) {
            ["price"]=>
            string(3) "300"
            ["product"]=>
            string(5) "pt995"
            ["shop"]=>
            string(9) "老凤祥"
          }
          [1]=>
          array(3) {
            ["price"]=>
            string(2) "pt"
            ["product"]=>
            string(6) "黄金"
            ["shop"]=>
            string(9) "老凤祥"
          }
        }
      }
      ["gold"]=>
      array(3) {
        ["老庙"]=>
        array(2) {
          [0]=>
          array(3) {
            ["price"]=>
            string(3) "279"
            ["product"]=>
            string(6) "金条"
            ["shop"]=>
            string(6) "老庙"
          }
          [1]=>
          array(3) {
            ["price"]=>
            string(3) "299"
            ["product"]=>
            string(6) "黄金"
            ["shop"]=>
            string(6) "老庙"
          }
        }
        ["老凤祥"]=>
        array(2) {
          [0]=>
          array(3) {
            ["price"]=>
            string(3) "322"
            ["product"]=>
            string(6) "金条"
            ["shop"]=>
            string(9) "老凤祥"
          }
          [1]=>
          array(3) {
            ["price"]=>
            string(3) "299"
            ["product"]=>
            string(6) "黄金"
            ["shop"]=>
            string(9) "老凤祥"
          }
        }
        ["六福"]=>
        array(1) {
          [0]=>
          array(3) {
            ["price"]=>
            string(3) "300"
            ["product"]=>
            string(6) "金条"
            ["shop"]=>
            string(6) "六福"
          }
        }
      }
    }

其他：

/** * 将二维数组组装成三维数组（根据某个key） * @param $arr * @param $key * @date 2020/8/6 * @time 10:13 * @return array */
    function changeTwoToThree($arr, $key) { 
        $new = [];
        for ($i = 0; $i < count($arr); $i++) { 
            if (array_key_exists($arr[$i][$key], $new)) { 
                array_push($new[$arr[$i][$key]], $arr[$i]);
            } else { 
                $new[$arr[$i][$key]][0] = $arr[$i];
            }
        }
        return $new;
    }
    
    /** * 将数组的key恢复成数字序列（兼容多维数组） * @param $arr * @return array * @date 2020/8/6 * @time 10:46 * @author zzy */
    function restore_array($arr){ 
        if (!is_array($arr)){  return $arr; }
        $c = 0; $new = array();
        foreach ($arr as $key => $value) { 
            if (is_array($value)){ 
                $new[$c] = restore_array($value);
            }
            else {  $new[$c] = $value; }
            $c++;
        }
        return $new;
    }
    /** 将一维数组的key恢复成数字序列 */
    function restore_array2($arr) { 
        foreach($arr as $value){ 
            $new[] = $value;
        }
        return $new;
    }
    // 二维
    function restore_array3($arr) { 
        for($i=0;$i<count($arr);$i++) { 
             $arr[$i] = restore_array2($arr[$i]);
        }
        return $arr;
    }

**参考链接：**

*  [https://www.cnblogs.com/dengcw/p/5514453.html][https_www.cnblogs.com_dengcw_p_5514453.html]
 *  [https://www.jb51.net/article/65053.htm][https_www.jb51.net_article_65053.htm]
 *  [https://www.cnblogs.com/richerdyoung/p/11765206.html][https_www.cnblogs.com_richerdyoung_p_11765206.html]

[https_www.cnblogs.com_dengcw_p_5514453.html]: https://www.cnblogs.com/dengcw/p/5514453.html
[https_www.jb51.net_article_65053.htm]: https://www.jb51.net/article/65053.htm
[https_www.cnblogs.com_richerdyoung_p_11765206.html]: https://www.cnblogs.com/richerdyoung/p/11765206.html