Working with multidimensional arrays in PHP is a common task. Sometimes, you may need to find the highest value in a multidimensional array. In this tutorial, you will learn how to get the maximum or highest value from the multidimensional array in PHP.
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How to Find/Get the Highest Value in Multidimensional Array?
Here are some simple methods and examples:
- Method 1: Using a ForEach Loop with Max
- Method 2: Using the max function and array_merge
- Method 3: Using array_reduce and max
- Method 4: Using for loop with max
Method 1: Using a ForEach Loop with Max
A loop is one of the simplest methods to find the highest value in a multidimensional array. Here’s an example code:
// Define a sample multidimensional array
$array = array(
array(5, 10, 15),
array(20, 25, 30),
array(35, 40, 45),
);
// Initialize the maximum variable to the first element
$max = $array[0][0];
// Loop through each element in the multidimensional array
foreach($array as $sub_array) {
foreach($sub_array as $element) {
if($element > $max) {
$max = $element;
}
}
}
// Print the maximum value
echo $max;
Output:
45
Method 2: Using the max function and array_merge
You can also use php built-in max() function to find the highest value in a multidimensional array Here’s an example code:
// Define a sample multidimensional array
$array = array(
array(5, 10, 15),
array(20, 25, 30),
array(35, 40, 45),
);
// Merge all sub-arrays into a single array
$merged_array = call_user_func_array('array_merge', $array);
// Find the maximum value using the max function
$max = max($merged_array);
// Print the maximum value
echo $max;
Output:
45
Method 3: Using array_reduce and max
Another method is named array_reduce() to find the highest value in a multidimensional array. Here’s an example code:
// Define a sample multidimensional array
$array = array(
array(5, 10, 15),
array(20, 25, 30),
array(35, 40, 45),
);
// Define a callback function to find the maximum value
$callback = function($carry, $item) {
return max($carry, max($item));
};
// Use array_reduce to apply the callback function to each sub-array
$max = array_reduce($array, $callback, PHP_INT_MIN);
// Print the maximum value
echo $max;
Output:
45
Method 4: Using for loop with max
Let’s take the second example, to get the highest value in the multidimensional array using for loop in PHP.
<?php
//get the max value from multi dimenstion array in php
$array = [[100, 200, 600],[205, 108, 849, 456],[548, 149, 7840]];
$max = 0;
for($i=0;$i<count($array);$i++)
{
for($j=0;$j<count($array[$i]);$j++)
{
if ($array[$i][$j] > $max)
{
$max = $array[$i][$j];
}
}
}
print $max;
?>
The output of the above code is: 7840
Conclusion
In this tutorial, you have learned how to get the maximum or highest value from the multidimensional array in PHP.
