PHP filters two-dimensional and three-dimensional arrays

<span> 1</span> <?<span>php
</span><span> 2</span><span> 3</span><span>$arr</span> =<span> [
</span><span> 4</span>         [1,3,5,7,9],
<span> 5</span>         [2,4,6,8,0<span>]
</span><span> 6</span><span>    ];
</span><span> 7</span><span>$arr2</span> =<span> [
</span><span> 8</span>         'list' =><span> [
</span><span> 9</span>             [1,3,5,7],
<span>10</span>             [2,4,6,8],
<span>11</span>             [3,2,9,0],
<span>12</span><span>        ]
</span><span>13</span><span>    ];
</span><span>14</span><span>$arr3</span> =<span> [
</span><span>15</span>         'list' =><span> [
</span><span>16</span>             [1,3,5,7],
<span>17</span>             [2,4,6,8],
<span>18</span>             [3,2,9,0<span>]
</span><span>19</span><span>        ]
</span><span>20</span><span>    ];
</span><span>21</span><span>22</span><span>$res</span> = <span>array_map</span>(<span>function</span>(<span>$arr</span><span>){
</span><span>23</span><span>return</span><span>array_filter</span>(<span>$arr</span>, <span>function</span>(<span>$v</span><span>) {
</span><span>24</span><span>return</span><span>$v</span> !== 5<span>;
</span><span>25</span><span>        });
</span><span>26</span>     }, <span>$arr</span><span>);
</span><span>27</span><span>28</span><span>$res2</span> = <span>array_map</span>(<span>function</span>(<span>$val</span><span>) {
</span><span>29</span><span>return</span><span>array_filter</span>(<span>$val</span>, <span>function</span>(<span>$v</span><span>) {
</span><span>30</span><span>return</span> !<span>in_array</span>(6, <span>$v</span><span>);
</span><span>31</span><span>        });
</span><span>32</span>     }, <span>$arr2</span><span>);
</span><span>33</span><span>34</span><span>$res3</span> =<span> [];
</span><span>35</span><span>array_walk</span>(<span>$arr3</span>, <span>function</span>(<span>$val</span>, <span>$key</span>) <span>use</span>(&<span>$res3</span><span>) {
</span><span>36</span><span>$res3</span>[<span>$key</span>] = <span>array_filter</span>(<span>$val</span>, <span>function</span>(<span>$v</span><span>) {
</span><span>37</span><span>return</span> !<span>in_array</span>(6, <span>$v</span><span>);
</span><span>38</span><span>        });
</span><span>39</span><span>    });
</span><span>40</span><span>41</span><span>var_dump</span>(<span>$res2</span><span>);
</span><span>42</span><span>var_dump</span>(<span>$res3</span>);

The above introduces PHP filtering two-dimensional arrays and three-dimensional arrays, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.