How to get the maximum value of an array in PHP?

You can use the built-in max function in PHP to find the maximum value of an array. The max function takes one or more parameters and returns the highest value among them.

For example, when you have an array of integers, you can use the following code to find the maximum value:

$array = [1, 2, 3, 4, 5];
$maxValue = max($array);
echo $maxValue;  // 输出 5

One option to convert an associative array into an indexed array is to use the array_values function, and then use the max function.

$array = ['a' => 1, 'b' => 2, 'c' => 3];
$maxValue = max(array_values($array));
echo $maxValue;  // 输出 3

If there are strings in the array, the max function will convert them to numbers for comparison. If the array is empty, the max function will return -∞ (negative infinity).

$array = ['10', '-2', '5'];
$maxValue = max($array);
echo $maxValue;  // 输出 10

It’s important to note that the max function can only find the maximum value of a one-dimensional array. If you need to find the maximum value of a multi-dimensional array, you can use recursion or loops to achieve this.