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.

Syntax

Following below is the syntax to use this function -

float stats_skew( array $a )


Parameter Details

Sr.NoParameterDescription
1

a

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.

Dependencies

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).

Example1

The below example returns the skewness of values in an array -

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

Output

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

string(11) "1.505674536"

Example2

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

<?php
   // error cases
   var_dump(stats_skew(array())); // empty array
?>

Output

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

bool(false)


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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