Generic PHP Debug function

<?php
## Remember to define the debug constant accordingly
## For dev and local enviroments:
define('API_DEBUG_MODE', TRUE);

## For live environments DO NOT DEFINE THE CONSTANT

/**
 * Reducing code smells and making more readable;
 * Usage:
 * Replace
 *  if($value === false){ ... }
 * with
 *  if(isFalse($value)){ ... }
 *
 * @param mixed $value
 * @author Shaun B
 * @date 4 Jul 2018 16:28:20
 * @return bool
 */
function isFalse($value = false): bool
{
    return (bool) ($value === FALSE) ? 1 : 0;
}

/**
 * Reducing code smells and making more readable;
 * Usage:
 * Replace
 * if($value === true){ ... }
 * with
 * if(isTrue($value)){ ... }
 *
 * @param mixed $value
 * @author Shaun B
 * @date 4 Jul 2018 16:29:27
 * @return boolean
 */
function isTrue($value = true): bool
{
    return (bool) ($value === TRUE) ? 1 : 0;
}

/**
 * Generic debug to see the contents of an object, resource or scalar
 * Not intended to be deployed live
 *
 * @param mixed $value
 * @param bool $die
 * @param string $message
 * @param string $file
 * @param string $line
 * @param string $header
 * @author Shaun B
 * @date 3 Apr 2018 13:37:42
 * @return void
 */
function debug($value = null, bool $die = false, string $message = null, string $file = null, string $line = null, string $header = null): void
{
    if (isTrue(defined('API_DEBUG_MODE'))) {
        $openDiv = '<div>';
        $closeDiv = '</div>';
        $openPre = '<pre>';
        $closePre = '</pre>';

        echo (strlen($header) > 0) ? "{$openDiv}<h1>{$header}</h1>" : "";
        echo $openPre . print_r($value, true) . $closePre;
        echo (! empty($file)) ? $openPre . 'File: ' . print_r($file, true) . $closePre : "";
        echo (! empty($line)) ? $openPre . 'Line: ' . print_r($line, true) . $closePre : "";
        echo (strlen($header) > 0) ? "{$closeDiv}" : "";
        if ($die === true) {
            die($message ?? '');
        }
    }
}