Solutions to some errors encountered in PHP development

This article mainly introduces the solutions to some errors encountered in PHP development. It has certain reference value. Now I share it with you. Friends in need can refer to it

In program development and debugging During the error process, we will always encounter various error, some error will affect the execution of the code, and some will just give a WARNING or NOTICE will not affect the continued execution of the following code.

PHP provides an error control operator @, which when placed before a PHP expression, Any error messages that may be generated by the expression are ignored. If you want to control the type of output error, you can tell the compiler what kind of error should be reported through the error_reporting() function.

int error_reporting ([ int $level ] ): Set what kind of PHP errors should be reported
$level is the error level, returning the old [error_reporting] level, or the current level if the level parameter is not given.

<?php // 关闭所有PHP错误报告
error_reporting(0);

// Report simple running errors
error_reporting(E_ERROR | E_WARNING | E_PARSE);

// 报告 E_NOTICE也挺好 (报告未初始化的变量或者捕获变量名的错误拼写)
error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);

// 除了 E_NOTICE，报告其他所有错误
error_reporting(E_ALL ^ E_NOTICE);

// 报告所有 PHP 错误 (参见 changelog)
error_reporting(E_ALL);

// 报告所有 PHP 错误
error_reporting(-1);

// 和 error_reporting(E_ALL); 一样
ini_set(&#39;error_reporting&#39;, E_ALL);

?>

The error levels and constants are defined in the predefined constants of PHP:

We often encounter them in development The ones are E_ERROR, E_WARNING, E_PARSE, E_NOTICE.

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