How to print error message in php

How to print error information in php: 1. Modify the content of php.ini such as "display_startup_errors = On"; 2. Add "error_reporting(-1);" to the first line of the php file that needs to be debugged.

The operating environment of this article: Windows 7 system, PHP version 7.1, Dell G3 computer.

php How to print error message?

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 learning: "

PHP video tutorial"

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