Added version 1.0.0

Author: KSym04

core/cvwp-helpers-function.php

@@ -0,0 +1,65 @@
+<?php
+/**
+ * Helpers
+ *
+ * @package Count Visitors WP
+ * @since 1.0.0
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Get visitor original IP address.
+ *
+ * @since 1.0.0
+ *
+ * @param  bool $validate   True if wants some validations.
+ * @return string           String formatted IP address of user.
+ */
+function count_visitors_get_ip( $validate = true ) {
+	// ipkeys.
+	$ipkeys = array(
+		'REMOTE_ADDR',
+		'HTTP_CLIENT_IP',
+		'HTTP_X_FORWARDED_FOR',
+		'HTTP_X_FORWARDED',
+		'HTTP_FORWARDED_FOR',
+		'HTTP_FORWARDED',
+		'HTTP_X_CLUSTER_CLIENT_IP',
+	);
+
+	$ip = array();
+	foreach ( $ipkeys as $keyword ) {
+		if ( ! empty( $_SERVER[ $keyword ] ) ) {
+			$server_keyword = sanitize_text_field( wp_unslash( $_SERVER[ $keyword ] ) );
+			if ( $validate ) {
+				if ( count_visitors_validate_ip( $server_keyword ) ) {
+					$ip[] = $server_keyword;
+				}
+			} else {
+				$ip[] = $server_keyword;
+			}
+		}
+	}
+
+	$ip = ( empty( $ip ) ? 'Unknown' : implode( ', ', $ip ) );
+	return $ip;
+}
+
+/**
+ * Validate IP address.
+ *
+ * @since 1.0.0
+ *
+ * @param   string $ip     String IP address of user.
+ * @return  bool            Return status validity of IP address.
+ */
+function count_visitors_validate_ip( $ip ) {
+	if ( filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE ) ) {
+		return true;
+	} else {
+		return false;
+	}
+}