diff --git a/app/time_conditions/time_condition_edit.php b/app/time_conditions/time_condition_edit.php
index 41e0201dcb..0b2649273b 100644
--- a/app/time_conditions/time_condition_edit.php
+++ b/app/time_conditions/time_condition_edit.php
@@ -62,7 +62,7 @@
 	unset($preset_region);
 
 //set the action as an add or an update
-	if (is_uuid($_REQUEST["id"])) {
+	if (!empty($_REQUEST["id"]) && is_uuid($_REQUEST["id"])) {
 		$action = "update";
 		$dialplan_uuid = $_REQUEST["id"];
 	}
@@ -84,7 +84,7 @@
 		if (permission_exists('time_condition_context')) {
 			$dialplan_context = $_POST["dialplan_context"];
 		}
-		$dialplan_enabled = $_POST["dialplan_enabled"] ?: 'false';
+		$dialplan_enabled = $_POST["dialplan_enabled"] ?? 'false';
 		$dialplan_description = $_POST["dialplan_description"];
 
 		if (!permission_exists('time_condition_domain')) {
@@ -218,7 +218,7 @@
 			//remove presets not checked, restructure variable array
 			if (is_array($_REQUEST['variable']['preset'])) {
 				foreach ($_REQUEST['variable']['preset'] as $group_id => $conditions) {
-					if (!is_array($_REQUEST['preset']) || !in_array($group_id, $_REQUEST['preset'])) {
+					if (empty($_REQUEST['preset']) || !is_array($_REQUEST['preset']) || !in_array($group_id, $_REQUEST['preset'])) {
 						unset($_REQUEST['variable']['preset'][$group_id]);
 						unset($_REQUEST['value'][$group_id]);
 						unset($_REQUEST['dialplan_action'][$group_id]);
@@ -275,8 +275,8 @@
 			if (is_array($_REQUEST['variable'])) {
 				foreach ($_REQUEST['variable'] as $group_id => $meh) {
 					if (
-						(is_array($_REQUEST['preset']) && in_array($group_id, $_REQUEST['preset']) && $_REQUEST['dialplan_action'][$group_id] == '' && $_REQUEST['default_preset_action'] == '' && $_REQUEST['dialplan_anti_action'] == '') ||
-						((!is_array($_REQUEST['preset']) || !in_array($group_id, $_REQUEST['preset'])) && $_REQUEST['dialplan_action'][$group_id] == '')
+						(!empty($_REQUEST['preset']) && is_array($_REQUEST['preset']) && in_array($group_id, $_REQUEST['preset']) && $_REQUEST['dialplan_action'][$group_id] == '' && $_REQUEST['default_preset_action'] == '' && $_REQUEST['dialplan_anti_action'] == '') ||
+						((empty($_REQUEST['preset']) || !is_array($_REQUEST['preset']) || !in_array($group_id, $_REQUEST['preset'])) && $_REQUEST['dialplan_action'][$group_id] == '')
 						) {
 						unset($_REQUEST['variable'][$group_id]);
 						unset($_REQUEST['value'][$group_id]);
@@ -298,10 +298,10 @@
 					$group_conditions_exist[$group_id] = false;
 
 					//determine if preset
-					$is_preset = (is_array($_REQUEST['preset']) && in_array($group_id, $_REQUEST['preset'])) ? true : false;
+					$is_preset = !empty($_REQUEST['preset']) && is_array($_REQUEST['preset']) && in_array($group_id, $_REQUEST['preset']) ? true : false;
 
 					//set group and order number
-					$dialplan_detail_group_user = $_POST["group_$group_id"];
+					$dialplan_detail_group_user = $_POST['group_'.$group_id] ?? null;
 					if ($dialplan_detail_group_user != '') {
 						$dialplan_detail_group = $dialplan_detail_group_user;
 					}
@@ -524,13 +524,13 @@
 			}
 
 		//redirect the browser
-			header("Location: time_condition_edit.php?id=".$dialplan_uuid.($app_uuid != '' ? "&app_uuid=".$app_uuid : null));
+			header("Location: time_condition_edit.php?id=".$dialplan_uuid.(!empty($app_uuid) && is_uuid($app_uuid) ? "&app_uuid=".$app_uuid : null));
 			exit;
 
 	}
 
 //get existing data to pre-populate form
-	if (is_uuid($dialplan_uuid) && $_POST["persistformvar"] != "true") {
+	if (!empty($dialplan_uuid) && is_uuid($dialplan_uuid) && (empty($_POST["persistformvar"]) || $_POST["persistformvar"] != "true")) {
 
 		//get main dialplan entry
 			$sql = "select * from v_dialplans ";
@@ -595,7 +595,7 @@
 					if ($row['dialplan_detail_group'] > $dialplan_detail_group_max) { $dialplan_detail_group_max = $row['dialplan_detail_group']; }
 				}
 				//reorder any invalid preset dialplan detail groups
-				if (is_array($invalid_presets_dialplan_detail_groups) && @sizeof($invalid_presets_dialplan_detail_groups) != 0) {
+				if (isset($invalid_presets_dialplan_detail_groups) && is_array($invalid_presets_dialplan_detail_groups) && @sizeof($invalid_presets_dialplan_detail_groups) != 0) {
 					foreach ($dialplan_details as $i => $row) {
 						if (in_array($row['dialplan_detail_group'], $invalid_presets_dialplan_detail_groups)) {
 							$dialplan_details[$i]['dialplan_detail_group'] = $dialplan_detail_group_max + 5;
@@ -609,12 +609,12 @@
 							$dialplan_anti_action = $row['dialplan_detail_type'].($row['dialplan_detail_data'] != '' || $row['dialplan_detail_type'] == 'hangup' ? ':'.$row['dialplan_detail_data'] : null);
 						}
 						else {
-							$dialplan_detail_group = $dialplan_detail_group_preset[$row['dialplan_detail_group']] ?: $row['dialplan_detail_group'];
+							$dialplan_detail_group = $dialplan_detail_group_preset[$row['dialplan_detail_group']] ?? $row['dialplan_detail_group'];
 							$dialplan_actions[$dialplan_detail_group] = $row['dialplan_detail_type'].($row['dialplan_detail_data'] != '' || $row['dialplan_detail_type'] == 'hangup' ? ':'.$row['dialplan_detail_data'] : null);
 						}
 					}
 					else if ($row['dialplan_detail_tag'] == 'condition') {
-						$dialplan_detail_group = $dialplan_detail_group_preset[$row['dialplan_detail_group']] ?: $row['dialplan_detail_group'];
+						$dialplan_detail_group = $dialplan_detail_group_preset[$row['dialplan_detail_group']] ?? $row['dialplan_detail_group'];
 						$current_conditions[$dialplan_detail_group][$row['dialplan_detail_type']] = $row['dialplan_detail_data'];
 					}
 				}
@@ -632,7 +632,7 @@
 									if (is_array($condition_variables)) {
 										foreach ($condition_variables as $condition_variable_name => $condition_variable_value) {
 											//count matching variable values
-											if ($preset_variables[$condition_variable_name] == $condition_variable_value) { $matches++; }
+											if (isset($preset_variables[$condition_variable_name]) && $preset_variables[$condition_variable_name] == $condition_variable_value) { $matches++; }
 										}
 									}
 									//if all preset variables found, then condition is a preset
@@ -710,7 +710,7 @@
 		$time_condition_vars["date-time"] = $text['label-date-and-time'];
 		if (is_array($time_condition_vars)) {
 			foreach ($time_condition_vars as $var_name => $var_label) {
-				echo "html += \"	<option value='".$var_name."' ".(($custom_conditions[$c]['var'] == $var_name) ? "selected='selected'" : null).">".$var_label."</option>\";";
+				echo "html += \"	<option value='".$var_name."'>".$var_label."</option>\";";
 			}
 		}
 		?>
@@ -963,7 +963,7 @@ echo "<td width='30%' class='vncellreq' valign='top' align='left' nowrap>\n";
 echo "    ".$text['label-name']."\n";
 echo "</td>\n";
 echo "<td width='70%' class='vtable' align='left'>\n";
-echo "    <input class='formfld' type='text' name='dialplan_name' maxlength='255' value=\"".escape($dialplan_name)."\">\n";
+echo "    <input class='formfld' type='text' name='dialplan_name' maxlength='255' value=\"".escape($dialplan_name ?? null)."\">\n";
 echo "	<br />\n";
 echo "	".$text['description-name']."\n";
 echo "<br />\n";
@@ -976,7 +976,7 @@ echo "<td class='vncellreq' valign='top' align='left' nowrap>\n";
 echo "	".$text['label-extension']."\n";
 echo "</td>\n";
 echo "<td class='vtable' align='left'>\n";
-echo "	<input class='formfld' type='text' name='dialplan_number' id='dialplan_number' maxlength='255' value=\"".escape($dialplan_number)."\">\n";
+echo "	<input class='formfld' type='text' name='dialplan_number' id='dialplan_number' maxlength='255' value=\"".escape($dialplan_number ?? null)."\">\n";
 echo "	<br />\n";
 echo "	".$text['description-extension']."<br />\n";
 echo "</td>\n";
@@ -1024,14 +1024,14 @@ if ($action == 'update') {
 	$largest_group_id = 0;
 	if (is_array($current_conditions)) {
 		foreach ($current_conditions as $group_id => $conditions) {
-			if (!is_array($current_presets) || (is_array($current_presets) && !in_array($group_id, $current_presets))) {
+			if (empty($current_presets) || (is_array($current_presets) && !in_array($group_id, $current_presets))) {
 				add_custom_condition($destination, $group_id, $dialplan_actions[$group_id]);
 				if (is_array($conditions)) {
 					foreach ($conditions as $cond_var => $cond_val) {
 						$range_indicator = ($cond_var == 'date-time') ? '~' : '-';
 						$tmp = explode($range_indicator, $cond_val);
 						$cond_val_start = $tmp[0];
-						$cond_val_stop = $tmp[1];
+						$cond_val_stop = $tmp[1] ?? null;
 						unset($tmp);
 
 						//convert minute-of-day to time-of-day values
@@ -1093,7 +1093,7 @@ if ($action == 'update') {
 			foreach ($available_presets as $preset_number => $preset) {
 				if (is_array($preset)) {
 					foreach ($preset as $preset_name => $preset_variables) {
-						$checked = is_array($current_presets) && in_array($preset_name, $current_presets) ? "checked='checked'" : null;
+						$checked = !empty($current_presets) && is_array($current_presets) && in_array($preset_name, $current_presets) ? "checked='checked'" : null;
 						$preset_group_id = $preset_number * 5 + 100;
 						if (!empty($text['label-preset_'.$preset_name])) {
 							$label_preset_name = $text['label-preset_'.$preset_name];
@@ -1115,21 +1115,21 @@ if ($action == 'update') {
 						echo "		</tr>";
 						echo "		<tr>";
 						echo "			<td colspan='4' style='padding-top: 10px;'>";
-						echo 				$destination->select('dialplan', 'dialplan_action['.$preset_group_id.']', $dialplan_actions[$preset_name]);
+						echo 				$destination->select('dialplan', 'dialplan_action['.$preset_group_id.']', $dialplan_actions[$preset_name] ?? null);
 						echo "			</td>";
 						echo "		</tr>";
 						echo "	</table>";
 						echo "	<br />";
 						echo "</div>";
 
-						if ($action == 'update' && is_array($current_presets) && in_array($preset_name, $current_presets)) {
+						if (!empty($action) && $action == 'update' && !empty($current_presets) && is_array($current_presets) && in_array($preset_name, $current_presets)) {
 							//add (potentially customized) preset conditions and populate
 							if (is_array($current_conditions[$preset_name])) {
 								foreach ($current_conditions[$preset_name] as $cond_var => $cond_val) {
 									$range_indicator = ($cond_var == 'date-time') ? '~' : '-';
 									$tmp = explode($range_indicator, $cond_val);
 									$cond_val_start = $tmp[0];
-									$cond_val_stop = $tmp[1];
+									$cond_val_stop = $tmp[1] ?? null;
 									unset($tmp);
 
 									//convert minute-of-day to time-of-day values
@@ -1166,7 +1166,7 @@ if ($action == 'update') {
 									$range_indicator = ($preset_variable == 'date-time') ? '~' : '-';
 									$tmp = explode($range_indicator, $preset_value);
 									$preset_value_start = $tmp[0];
-									$preset_value_stop = $tmp[1];
+									$preset_value_stop = $tmp[1] ?? null;
 									unset($tmp);
 									echo "<script>\n";
 									echo "	condition_id = add_condition(".$preset_group_id.",'preset');\n";
@@ -1190,7 +1190,7 @@ if ($action == 'update') {
 		echo "			<td>";
 		echo button::create(['type'=>'button','label'=>$text['button-advanced'],'icon'=>'tools','onclick'=>"$(this).fadeOut(400, function() { $('#default_preset_destination').fadeIn(400); document.getElementById('default_preset_destination_description').innerHTML += '<br>".$text['description-presets_advanced']."'; });"]);
 		echo "				<span id='default_preset_destination' style='display: none;'>";
-		echo 				$destination->select('dialplan', 'default_preset_action', $dialplan_action);
+		echo 				$destination->select('dialplan', 'default_preset_action', $dialplan_action ?? null);
 		echo "				</span>";
 		echo "			</td>";
 		echo "		</tr>";
@@ -1206,7 +1206,7 @@ if ($action == 'update') {
 	echo "	".$text['label-alternate-destination']."\n";
 	echo "</td>\n";
 	echo "<td class='vtable' align='left'>\n";
-	echo "	".$destination->select('dialplan', 'dialplan_anti_action', $dialplan_anti_action);
+	echo "	".$destination->select('dialplan', 'dialplan_anti_action', $dialplan_anti_action ?? null);
 	echo "</td>\n";
 	echo "</tr>\n";
 
@@ -1293,7 +1293,7 @@ if ($action == 'update') {
 	echo "	".$text['label-description']."\n";
 	echo "</td>\n";
 	echo "<td colspan='4' class='vtable' align='left'>\n";
-	echo "	<input class='formfld' type='text' name='dialplan_description' maxlength='255' value=\"".escape($dialplan_description)."\">\n";
+	echo "	<input class='formfld' type='text' name='dialplan_description' maxlength='255' value=\"".escape($dialplan_description ?? null)."\">\n";
 	echo "<br />\n";
 	echo "</td>\n";
 	echo "</tr>\n";
@@ -1311,4 +1311,4 @@ if ($action == 'update') {
 //include the footer
 	require_once "resources/footer.php";
 
-?>
+?>
\ No newline at end of file