X-Git-Url: https://git.mxchange.org/?p=mailer.git;a=blobdiff_plain;f=inc%2Ffunctions.php;h=5fb35afd9f707113a8e54ec8c0466baff0661b9b;hp=806bf7da525c2ca3c7513677bac2f5d9e2372435;hb=96d8f54d3fee1d51c38dd6b79c28215f7f5c83ec;hpb=da50e51b98ba0901d6251b7f36e138ac6f63518d

diff --git a/inc/functions.php b/inc/functions.php
index 806bf7da52..5fb35afd9f 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -330,7 +330,7 @@ function translateMenuVisibleLocked ($content, $prefix = '') {
 }
 
 // Generates an URL for the dereferer
-function generateDerefererUrl ($url) {
+function generateDereferrerUrl ($url) {
 	// Don't de-refer our own links!
 	if (substr($url, 0, strlen(getUrl())) != getUrl()) {
 		// Encode URL
@@ -2396,6 +2396,18 @@ function memberListBuilder ($listType, $tableName, $columns, $filterFunctions, $
 	doGenericListBuilder('member', $listType, $tableName, $columns, $filterFunctions, $extraValues, $idColumn, $userIdColumn, $rawUserId);
 }
 
+// Checks whether given address is IPv4
+function isIp4AddressValid ($address) {
+	// Is there cache?
+	if (!isset($GLOBALS[__FUNCTION__][$address])) {
+		// Determine it ...
+		$GLOBALS[__FUNCTION__][$address] = preg_match('/((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9]))/', $address);
+	} // END - if
+
+	// Return cache
+	return $GLOBALS[__FUNCTION__][$address];
+}
+
 // ----------------------------------------------------------------------------
 //              "Translatation" functions for points_data table
 // ----------------------------------------------------------------------------