php need to sort arrays in array and get respective key

Question

I need to sort the following multidimensional array in php and thereafter get the respective key of any array that I want:

array:3 [▼
  0 => array:1 [▼
    4 => "404"
  ]
  1 => array:1 [▼
    5 => "373"
  ]
  2 => array:1 [▼
    6 => "305"
  ]
]

In the above case, I would like to get the position / key of 5 after sorting 404, 373 and 305.

The result of this should be value 2.

Have you looked into Sorting Arrays and tried it yourself? There is a comparison of sorting functions. — xander
– xander, Commented Aug 11, 2017 at 8:52

M. Eriksson · Accepted Answer · 2017-08-11 09:02:05Z

2

Just do a foreach-loop:

$array = [
  0 => [
    4 => "404"
  ],
  1 => [
    5 => "373"
  ],
  2 => [
    6 => "305"
  ]
];

foreach ($array as $index => $arr) {
    if (array_key_exists(5, $arr)) {
        echo $index + 1;
        break;
    }
}

Demo: https://3v4l.org/HH54K

Even though PHP has a bunch of built in array-functions, they can't do everything, and they are sometimes much slower than a simple foreach.

answered Aug 11, 2017 at 9:02

M. Eriksson

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