php - 如何去除多维数组中重复的键值数组

Question

我有这个数组，如果它的值与其他数组相同，我想删除它

$appointments = array(
                      array('1','Monday', '5:30 PM'),
                      array('2','Friday', '6:00 PM'),
                      array('3','Monday', '5:30 PM'),
                      array('4','Tuesday', '4:15 PM'),
                      array('5','Wednesday', '8:30 PM'),
                      array('6','Thursday', '1:45 PM')
);

我想要这个结果星期一，时间显示两次所以我只需要显示一次我为此使用下面的代码所以请为此提供更好的解决方案

$one_dimension = array_map('serialize', $appointments);
$unique_one_dimension = array_unique($one_dimension);
$unique_multi_dimension = array_map('unserialize', $unique_one_dimension);

echo "<pre>";print_r($unique_multi_dimension);

Answer 1

PHP code demo

<?php

$appointments = array(
                      array('1','Monday', '5:30 PM'),
                      array('2','Friday', '6:00 PM'),
                      array('3','Monday', '5:30 PM'),
                      array('4','Tuesday', '4:15 PM'),
                      array('5','Wednesday', '8:30 PM'),
                      array('6','Thursday', '1:45 PM')
);
//Here we are finding column of week days.


$implodedColumns=  array_map(function($data){
    unset($data[0]);
    return implode(",", array_map('trim', $data));
}, $appointments);
$result=array_unique($implodedColumns); 

array_walk($result, function(&$value,$key){
    $value=  array_merge(array($key),  explode(",", $value));
});

print_r($result); 

输出:

Array
(
    [0] => Array
        (
            [0] => 0
            [1] => Monday
            [2] => 5:30 PM
        )

    [1] => Array
        (
            [0] => 1
            [1] => Friday
            [2] => 6:00 PM
        )

    [3] => Array
        (
            [0] => 3
            [1] => Tuesday
            [2] => 4:15 PM
        )

    [4] => Array
        (
            [0] => 4
            [1] => Wednesday
            [2] => 8:30 PM
        )

    [5] => Array
        (
            [0] => 5
            [1] => Thursday
            [2] => 1:45 PM
        )

)