WordPress helper conditionals to run code in certain environments.

wordpress-environment-conditionals.php

<?php
/**
 * Helper conditionals to run code in certain environments.
 */

if ( ! defined( 'RH_ENV' ) ) {
	$hostname = $_SERVER['HTTP_HOST'];
	if ( isset( $_SERVER['HTTP_X_FORWARDED_HOST'] ) && ! empty( $_SERVER['HTTP_X_FORWARDED_HOST'] ) ) {
	    $hostname = $_SERVER['HTTP_X_FORWARDED_HOST'];
	}
	if ( strstr( $hostname, '.dev' ) ) {
		define( 'RH_ENV', 'dev' );
	} else {
		define( 'RH_ENV', 'production' );
	}
}

/**
 * Is the enviornment production?
 * @return boolean
 */
function rh_is_production() {
	if ( 'production' === RH_ENV ) {
		return true;
	}
	return false;
}

/**
 * Alias of rh_is_production().
 * @return boolean
 */
function rh_is_prod() {
	return rh_is_production();
}

/**
 * Is the environment staging?
 * @return boolean
 */
function rh_is_staging() {
	if ( 'staging' === RH_ENV ) {
		return true;
	}
	return false;
}

/**
 * Alias of rh_is_staging().
 * @return boolean
 */
function rh_is_stage() {
	return rh_is_staging();
}

/**
 * Is the environment dev?
 * @return boolean
 */
function rh_is_dev() {
	if ( 'dev' === RH_ENV ) {
		return true;
	}
	return false;
}