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PHP | stats_skew() Function

PHP stats_skew() 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_skew() Function.

The built-in stats_skew() function computes the skewness of the data in the array.


Following below is the syntax to use this function -

float stats_skew( array $a )

Parameter Details



The input array

Return Value

This PHP function returns the skewness of values in a or false if a is empty or is 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 below example returns the skewness of values in an array -

   var_dump(sprintf("%2.9f", stats_skew(array(99,333,5, 7, 2, 4))));


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

string(11) "1.505674536"


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

   // error cases
   var_dump(stats_skew(array())); // empty array


The above code will produce the following result and a warning in logs PHP Warning: stats_skew(): 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 will be studying about the PHP stats_standard_deviation() Function.

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