How to Efficiently Find Minimum and Maximum Values in a Multidimensional PHP Array?

Finding Minimum and Maximum Values in a Multidimensional PHP Array

You have an array with multiple subarrays containing key-value pairs. Your goal is to extract the minimum and maximum values for a specific key, in this case, 'Weight'.

Option 1: Using Array Functions

To obtain the list of weights without the rest of the details, use array_column:

<code class="php">$weights = array_column($array, 'Weight');</code>

Then, determine the minimum and maximum weights:

<code class="php">$min_value = min($weights);
$max_value = max($weights);</code>

Option 2: Array Reduction

Instead of converting the array to an array of weights, you can perform the min/max calculation directly using array_reduce:

<code class="php">$min_value = array_reduce($array, function($min, $details) {
  return min($min, $details['Weight']);
}, PHP_INT_MAX);

$max_value = array_reduce($array, function($max, $details) {
  return max($max, $details['Weight']);
}, PHP_INT_MIN);</code>

This approach iterates over each subarray to find the overall minimum or maximum weight.

Option 3: Looping Through Subarrays

If you do not have the previously mentioned array functions available, you can manually loop through the subarrays and track the minimum and maximum values:

<code class="php">$min_value = PHP_INT_MAX;
$max_value = PHP_INT_MIN;

foreach ($array as $subarray) {
  $min_value = min($min_value, $subarray['Weight']);
  $max_value = max($max_value, $subarray['Weight']);
}</code>

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