How to force printing errors in php

How to set up php to force printing errors: first find and open the "php.ini" configuration file; then set the display error message; finally print out all error messages through "error_reporting(-1);" .

#The operating environment of this article: Windows7 system, PHP7.1, Dell G3 computer.

PHP forces output error message

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

2. PHP file output

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

Online The server turns off PHP error prompts. When you need to debug online code, you can dynamically turn it on. Just add the following code to index.php

ini_set('display_errors', true);
error_reporting(E_ALL ^ E_WARNING ^ E_NOTICE);

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