PHP - 自定义错误处理程序不调用方法

Question

I'm new to error handling technique. I just created a custom error handler by following this manual similar to below,

<?php

public function customErrorHandler($errno, $errstr, $errfile, $errline) {
 //log error
}

set_error_handler([$this, 'customErrorHandler'])

?>

This works fine.

When I set error types to false then my custom error handler method doesn't get invoked! I don't know what I'm missing since new to handling errors.

<?php

public function customErrorHandler($errno, $errstr, $errfile, $errline) {
 //log error
}

set_error_handler([$this, 'customErrorHandler'], false)

?>