MY_Email :: initialize（）的声明应该与CI_Email :: initialize（）的声明兼容

A PHP Error was encountered
Severity: Runtime Notice

Message: Declaration of MY_Email::initialize() should be compatible with 
that of CI_Email::initialize()

Filename: libraries/MY_Email_3_1_x.php

Line Number: 1374

Backtrace:

File: C:\xampp\htdocs\e-com\application\libraries\MY_Email.php
Line: 17
Function: _error_handler

File: C:\xampp\htdocs\e-com\application\libraries\MY_Email.php
Line: 17
Function: require_once

File: C:\xampp\htdocs\e-com\application\controllers\User_pannel_controller.php Line: 478 Function: library

File: C:\xampp\htdocs\e-com\index.php Line: 315 Function: require_once

An Error Was Encountered SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

It means your child class is not compatible with the parent. For example:

class CI_Email
{
    public function initialize($a, $b)
    {
        echo 'foo';
    }
}

class MY_Email extends CI_Email
{
    public function initialize($a)
    {
        echo 'bar';
    }
}

This code would cause the ...should be compatible with... error because if you substituted an instance of My_Email for CI_Email, it would be dropping the required parameter $b.

Alter your child class' initialize method so that it contains all the same parameters as the parent class. You can add extra optional parameters, but you can't take them away, so you could do this:

public function initialize($a, $b, $c = 0) ...