Put integers in quotes as well. Proper JSON has all values in quotes. This is important because integers like 0123 are invalid

scripts/ZoneMinder/lib/ZoneMinder/General.pm

@@ -432,13 +432,13 @@ our $testedJSON = 0;
 our $hasJSONAny = 0;
 
 sub _testJSON {
-  return if ( $testedJSON );
+  return if $testedJSON;
   my $result = eval {
     require JSON::MaybeXS;
     JSON::MaybeXS->import();
   };
   $testedJSON = 1;
-  $hasJSONAny = 1 if ( $result );
+  $hasJSONAny = 1 if $result;
 }
 
 sub _getJSONType {
@@ -451,40 +451,41 @@ sub _getJSONType {
   return 'string';
 }
 
-sub jsonEncode;
-
 sub jsonEncode {
   my $value = shift;
 
   _testJSON();
   if ($hasJSONAny) {
-    my $string = eval { JSON::MaybeXS->encode_json( $value ) };
-    Fatal( "Unable to encode object to JSON: $@" ) unless( $string );
-    return( $string );
+    my $string = eval {
+      JSON::MaybeXS->encode_json($value);
+    };
+    Error('Unable to encode object to JSON: '.$@) unless $string;
+    return $string;
   }
 
   my $type = _getJSONType($value);
   if ($type eq 'integer' || $type eq 'double') {
-    return( $value );
+    return '"'.$value.'"';
   } elsif ($type eq 'boolean') {
-    return( $value?'true':'false' );
+    return $value ? 'true' : 'false';
   } elsif ( $type eq 'string' ) {
     $value =~ s|(["\\/])|\\$1|g;
     $value =~ s|\r?\n|\n|g;
-    return( '"'.$value.'"' );
+    return '"'.$value.'"';
   } elsif ( $type eq 'null' ) {
-    return( 'null' );
+    return 'null';
   } elsif ( $type eq 'array' ) {
-    return( '['.join( ',', map { jsonEncode( $_ ) } @$value ).']' );
+    return '['.join( ',', map { jsonEncode( $_ ) } @$value ).']';
   } elsif ( $type eq 'hash' ) {
     my $result = '{';
     while ( my ( $subKey=>$subValue ) = each(%$value) ) {
       $result .= ',' if ( $result ne '{' );
       $result .= '"'.$subKey.'":'.jsonEncode($subValue);
     }
-    return( $result.'}' );
+    return $result.'}';
   } else {
-    Fatal( "Unexpected type '$type'" );
+    Error("Unexpected type '$type'");
+    return '';
   }
 }