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Editor to share with you how to deal with errors in PHP warning, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

PHP error warning solution: 1, in the warning page to add "error_reporting (E_ALL ^ E_DEPRECATED);"; 2, modify php.ini file screen error.

This article operating environment: windows7 system, PHP5.5 version, DELL G3 computer

PHP error what to do with warning?

Resolve problems such as PHP display Warning and Notice

After PHP is installed, errors, reminders, warnings and other ways will be set in the php.ini file, so that we can timely understand the problems existing in the program when debugging PHP programs. Then, sometimes we don't need reminders, warnings, etc. For example, when we use PHP5.5 (or higher) and use the older MySql connection method with the MySql development environment, PHP will prompt: please use the latest MySql connection method. When you use it to read database content as json format (or other) to return to the foreground, the content will often have an error.

How to shield this error, there are the following ways:

1. Add masking error reminders on pages where reminders, or errors, or warnings may have occurred:

Error_reporting (E_ALL ^ E_DEPRECATED)

/ / in this version of php5.5, the old mysql connection method is no longer recommended

/ / but speedPHP still uses the old-fashioned connection method. At this time, php will report the E_deprecated prompt. If you turn off the prompt at this time, you can also Ok it.

/ / php is placed in deployment mode (non-development mode), but the best solution is to adopt the latest speedPHP

Generally speaking, you can also use the following to solve some problems such as notice waring.

Ini_set ("display_errors", 0)

Error_reporting (E_ALL ^ E_NOTICE)

Error_reporting (E_ALL ^ E_WARNING)

2. Open the php.ini file, find the relevant settings (as shown in the following figure), and change on to off to screen for errors (this method is not recommended):

Sometimes it still doesn't work if you modify the dispaly_errors of php.ini, so refer to the following method:

Modify php.ini to change display_errors = On to display_errors = Off, but it still doesn't work. Baidu had to set it up in php-fpm.conf.

Open php-fpm.conf and find:

/ usr/sbin/sendmail-t-I

0

Just change the value from 1 to 0.

3, this method is very suitable for those projects that have decided to adopt a way that is bound to cause reminders or warnings, a move to block, once and for all:

First, refer to 2, find the location of the relevant dispaly_errors, and change Off to On.

Then find the location in the following figure and modify the level at which you need to report an error, or the level at which you do not need to report an error

The error levels of the reference are as follows:

Definition and usage: error_reporting () sets the error level of PHP and returns the current level. Function syntax: error_reporting (report_level) if the parameter level is not specified, the current error level will be returned. The following are possible values for level: the value constant describes a fatal run error of 1 E_ERROR. The error cannot be recovered, pause the execution of the script. 2 E_WARNING runtime warnings (non-fatal errors). Script execution will not stop due to a non-fatal run error. 4 E_PARSE parsing error at compile time. Parsing errors are generated only by the parser. 8 E_NOTICE runtime reminders (these are often caused by bug in your code, or they can be caused by intentional behavior.) 16 fatal error in initialization process at startup of E_CORE_ERROR PHP. Warning (non-fatal error) during initialization of 32 E_CORE_WARNING PHP during startup. 64 E_COMPILE_ERROR compile time fatal error. This is like generating an E_ERROR by the Zend scripting engine. 128 E_COMPILE_WARNING compile-time warning (non-fatal error). This is like an E_WARNING warning generated by the Zend scripting engine. 256 E_USER_ERROR user-defined error message. This is like a warning message customized by a user using the PHP function trigger_error (programmer set E_ERROR) 512 E_USER_WARNING. This is like a user-defined reminder message using the PHP function trigger_error (an E_WARNING warning set by the programmer) 1024 E_USER_NOTICE. This is like a warning standardized by 2048 E_STRICT coding using the PHP function trigger_error (an E_NOTICE set for programmers). Allow PHP to suggest how to modify the code to ensure best interoperability forward compatibility. 4096 E_RECOVERABLE_ERROR fatal error. This is like an E_ERROR, but all errors and warnings (excluding E_STRICT) (E_STRICT will be part of E_ALL as of PHP 6. 0) of 8191 E_ALL can be caught through user-defined processing (see also set_error_handler ())

Example:

Any number of the above options can be connected with "or" (using OR or |) so that all required levels of errors can be reported.

For example, the following code turns off user-defined errors and warnings, performs some actions, and then reverts to the original error level:

The above is all the contents of the article "how to deal with errors in warning in PHP". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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