Custom Class not displaying echo - php

Question

I have been trying to write a class to be used for displaying errors and error log.
class CError {
//Error Logging
var $Log;
public function Log($Comment, $Detail = ""){
$Log .= $Comment . "\n";
if ($Detail !== ""){
$Log .= "--" . $Detail . "--\n";
}
}
public function Clear_Log(){
$Log = "";
}
public function Display_Log(){
echo $this->Log;
}
//Error Display
var $ErrorCode = array(
0 => "0: No Error Code found, so either you got here by some rogue code or ...",
1 => "1: General Error, if you are here something went wrong",
2 => "2: Invalid information provided",
3 => "3: Alternate path taken, check message for details",
42 => "42: Here is your answer, but do you know the question?",
50 => "50: You messed with the Creepers without your Diamond Sword, didn't you",
9001 => "9001: Its over 9000... or more likely a value used was to large",
418 => "418: I'm a Teapot, found the error that drove you crazy"
);
public function Error($Error = 0, $ShowLog = false){
if ($Error === ""){
$Error = 0;
}
foreach ($ErrorCode as $key => $value){
if($key == $Error){
echo "<h3 style='color:red'>" . $value . "</h3><br />";
}
}
if($ShowLog == true){
echo $this->Log;
}
}
}
This is how I use the error class
include 'CError.php';
$Error = new CError;
$Error->Log("Email is Required");
$Error->Display_Log();
$Error->Error(2,true);
The problem is, nothing is displayed when used. It is skipped I think but not sure. I do not have access to the error logs for the server so I do not know if an error is being produced or not but the code will run through to the exit points in my main code(irrelevant to the class)
--EDIT--
The answers that tell to change $Log with $this->Log has fixed the issue with the $Log variable. It still has not fixed the issue with the error code array being displayed in the foreach loop.
--EDIT--
I solved the issue by adding $this->ErrorCode to the foreach loop.

Answer 1

You need to access class variable like $this->Log() in Log and Clear_Log() functions.
Try:
public function Log($Comment, $Detail = ""){
$this->Log .= $Comment . "\n";
if ($Detail !== ""){
$this->Log .= "--" . $Detail . "--\n";
}
}
public function Clear_Log(){
$this->Log = "";
}

Answer 2

You should modify $this->Log in methods Log and Clear_Log, like you access it in Display_Log. And you just access a local variable.

Answer 3

you're using the name Log for both function as well as variable. try changing the name for any one.