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PHP | stats_harmonic_mean() Function

PHP stats_harmonic_mean() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP stats_harmonic_mean() Function.

The built-in stats_harmonic_mean() function in PHP is used to return the harmonic mean of an array of values.


Following below is the syntax to use this function -

number stats_harmonic_mean( array $a )

Parameter Details



The input array

Return Value

This built-in function returns the harmonic mean of values in a or false if a is empty or not an array.


This built-in function was first introduced in statistics extension (PHP version 4.0.0 and PEAR v1.4.0). In this tutorial guide, we used the latest release of stats-2.0.3 (PHP v7.0.0 or newer and PEAR version 1.4.0 or newer).


The following example below computes the harmonic mean of an array -

   var_dump(sprintf("%2.9f", stats_harmonic_mean(array(1,3,5,7))));


When the above code is executed, it will produce the following result -

string(11) "2.386363636"


Following example below is an error case, in the below example, we passed an empty array. A warning is shown in logs -

   // error cases


The above code will produce the following result and a warning in logs PHP Warning: stats_harmonic_mean(): The array has zero elements


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP stats_kurtosis() Function.

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