How to output errors to the page in php

How to output errors to the page in php: 1. Modify the content in php.ini to "display_errors=On"; 2. Add "ini_set('display_startup_errors',1" to the first line of the php file that needs to be debugged );".

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

php outputs all error messages

Method 1 Modify php.ini

;显示错误信息
display_errors = On
;显示php开始错误信息
display_startup_errors = On
;日志记录错误信息
log_errors = On

Method 2 Add

ini_set('display_errors',1);            //错误信息
ini_set('display_startup_errors',1);    //php启动错误信息
error_reporting(-1);                    //打印出所有的 错误信息
ini_set('error_log', dirname(__FILE__) . '/error_log.txt'); //将出错信息输出到一个文本文件

to the first line of the php file that needs to be debugged [Recommended study: "PHP Video Tutorial》】

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