更好的方法来检查按键是否所有的数组值是空的？

Question

我创建了函数来检查给定键的所有值是否为空。它工作正常，但我想知道这个功能是否可以优化或减少？

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; 
} 

例子：

$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

你可以像下面： -

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

输出： - https://eval.in/842810

Answer 2

您可以将功能减少到单行像这样：

<?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')); 

输出：

1