PHP：基于值分离数组

Question

I have got the following array:

$raw = [
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'used'
    ],
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'used'
    ],
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'used'
    ],
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'used'
    ],
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'used'
    ],
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'new'
    ],
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'new'
    ],
    [
        'prop1' => 'somevalue',
        'prop2' => 'anothervalue',
        'path' => 'new'
    ],
];

I need to filter through this array, preferably using filter_array to keep the code cleaner, I need to filter based on the path property. So I would end up with:

$filtered = [
    'used' => [
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'used'
        ],
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'used'
        ],
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'used'
        ],
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'used'
        ],
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'used'
        ]
    ],
    'new' => [
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'new'
        ],
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'new'
        ],
        [
            'prop1' => 'somevalue',
            'prop2' => 'anothervalue',
            'path' => 'new'
        ]
    ]
];

Answer 1

Your code lacks commas, so it's syntactically invalid. See the updated corrected code in the demo below. You just need this simple code:

<?php
  $filtered = array();
  foreach ($raw as $item) {
    $filtered[$item["path"]][] = $item;
  }

Output

Array
(
    [used] => Array
        (
            [0] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => used
                )

            [1] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => used
                )

            [2] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => used
                )

            [3] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => used
                )

            [4] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => used
                )

        )

    [new] => Array
        (
            [0] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => new
                )

            [1] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => new
                )

            [2] => Array
                (
                    [prop1] => somevalue
                    [prop2] => anothervalue
                    [path] => new
                )

        )

)

Demo: https://eval.in/1047516