Here are a few title options, keeping in mind the question format and the article\'s content: Direct and Clear: * How to Find Minimum and Maximum Values in a PHP Array by Key? * What are the Differe

Determining Minimum and Maximum Values in a PHP Array

When working with multidimensional arrays in PHP, extracting the minimum and maximum values for a specific key can be a common task. Suppose you have an array containing objects or arrays with "Weight" as one of the keys, like the example provided:

$array = [
    ['Weight' => 200],
    ['Weight' => 180],
    ['Weight' => 175],
    ['Weight' => 195]
];

To obtain the minimum and maximum values of "Weight," you can utilize several approaches:

Option 1: Using array_column() and Array Functions

Extract the weights into a new array using array_column() and then find the min and max values:

$weights = array_column($array, 'Weight');
$min = min($weights);
$max = max($weights);

Option 2: Mapping and Array Functions

Similarly, map over the array to extract the weights and then use array functions:

$weights = array_map(function ($item) {
    return $item['Weight'];
}, $array);

$min = min($weights);
$max = max($weights);

Option 4: Using array_reduce()

If you need only the minimum or maximum value, array_reduce() offers a faster alternative:

$min = array_reduce($array, function ($min, $item) {
    return min($min, $item['Weight']);
}, PHP_INT_MAX);

For the maximum value, start with 0 or -PHP_INT_MAX.

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