added random string and echo/log functions

opnsense-carp-dhcp-master.php

@@ -45,6 +45,17 @@ if (count($argv) > 1){
     }
 }
 
+function getRandString($n) {
+    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+    $randomString = '';
+  
+    for ($i = 0; $i < $n; $i++) {
+        $index = rand(0, strlen($characters) - 1);
+        $randomString .= $characters[$index];
+    }
+  
+    return $randomString;
+}
 
 function write_config_and_restart_services ($interface) {
     write_config();
@@ -58,6 +69,24 @@ function write_config_and_restart_services ($interface) {
     rrd_configure(true);
 }
 
+function echo_write_log ($randomString, $message) {
+    $dateTime = date("Y-m-d H:i:s");
+    $folder = '/var/log/opnsense_carp_dhcp';
+    $message = $dateTime . " - " . $randomString . " - " . $message . "\n";
+    if (!is_dir($folder)) {
+        mkdir($folder);
+    }
+    file_put_contents("$folder/log_".date("Ymd").".log", $message, FILE_APPEND);
+    echo $message;
+}
+
+$randomString = getRandString(5);
+
+echo_write_log($randomString, "Start of Script " . $argv[0]);
+echo_write_log($randomString, "WAN Interface: " . $wanInterface);
+echo_write_log($randomString, "Name of static WAN Gateway: " . $gatewayName);
+
+
 printf("Trying to ping sync host, %s. \n", $syncIP);
 exec("ping -c 4 " . $syncIP, $output, $result);
 if ($result == 0) {