PHP | stats_rand_gen_funiform() Function

PHP stats_rand_gen_funiform() 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_rand_gen_funiform() Function.

The built-in PHP stats_rand_gen_funiform() function generates uniform float between low (exclusive) and high (exclusive).

Syntax

Following below is the syntax to use this function -

float stats_rand_gen_funiform( float $low, float $high )


Parameter Details

Sr.NoParameterDescription
1

low

The lower bound (inclusive)

2

high

The upper bound (exclusive)


Return Value

This built-in PHP function returns a random deviate from uniform distribution from low to high.

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

Following example computes the random deviation from the uniform distribution by passing $low < $high-

<?php
   $x = stats_rand_gen_funiform(1.5, 2.5);
   var_dump(is_float($x));
   var_dump($x > 1.5);
   var_dump($x < 2.5);
?>

Output

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

bool(true)
bool(true)
bool(true)
bool(true)

Example2

Following example computes the random deviation from the uniform distribution -

<?php
   $x = stats_rand_gen_funiform(1.5, 1.5);
   var_dump($x);
?>

Output

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

float(1.5)

Example3

The following below is an error case. In the below example, we have passed low > high. A warning is shown in logs -

<?php
   // error cases
   var_dump(stats_rand_gen_funiform(2.5, 1.5));    // low > high
?>

Output

The above code will produce the following result and a warning in logs PHP Warning: stats_rand_gen_funiform(): low greater than high. low: 2.500000E+0 high: 1.500000E+0

bool(false)


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 built-in stats_rand_gen_gamma() Function.

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