检查键是否所有数组值都为空的更好方法？

Question

I created function to check if all values for given key are empty. It work fine but I would like to know if this function can be optimized or reduced ?

function array_key_empty($array, $key)
{
    if (is_array($array)) {
        foreach ($array as $item) {
            if (array_key_exists($key, $item)) {
                if (!empty(trim($item[$key]))) {
                    return false;
                }
            }
        }
    }

    return true;
}

Examples :

$array = [
    ['code' => '', 'description' => 'Oh there is a beautiful product !', 'price' => 10],
    ['code' => '', 'description' => 'Another beautiful product', 'price' => 20],
    ['code' => '', 'description' => 'Hey where will you stop ?!', 'price' => 30]
];

array_key_empty($array, 'code'); // true because all code are empty

$array = [
    ['code' => 'Yup !', 'description' => 'Oh there is a beautiful product !', 'price' => 10],
    ['code' => '', 'description' => 'Another beautiful product', 'price' => 20],
    ['code' => '', 'description' => 'Hey where will you stop ?!', 'price' => 30]
];

array_key_empty($array, 'code'); // false because Yup...

Answer 1

You can do it like below:-

if(count(array_filter( array_map('trim',array_column($array,'code'))))==0){
  echo "all values are empty";
}

Output:- https://eval.in/842810

Answer 2

you can reduce your function to a single line like this :

<?php

$array = [
    ['code' => '', 'description' => 'Oh there is a beautiful product !', 'price' => 10],
    ['code' => '', 'description' => 'Another beautiful product', 'price' => 20],
    ['code' => '', 'description' => 'Hey where will you stop ?!', 'price' => 30]
];


function array_key_empty($array, $key)
{
     return is_array($array) && empty(array_map('trim', array_filter(array_column($array, $key))));
}

echo "<pre>";
print_r(array_key_empty($array, 'code'));

output:

1