Как поймать ошибку require () или include () в PHP?
Я пишу скрипт в PHP5, который требует кода определенных файлов. Когда файл недоступен для включения, сначала выдается предупреждение и затем происходит фатальная ошибка. Я хотел бы напечатать собственное сообщение об ошибке, когда было невозможно включить код. Можно ли выполнить одну последнюю команду, если запрос не работает? следующее не сработало:
require('fileERROR.php5') or die("Unable to load configuration file."); Подавление всех сообщений об ошибках с использованием error_reporting(0) дает только белый экран, не используя error_reporting, дает PHP-ошибки, которые я не хочу показывать.
Вы можете выполнить это, используя set_error_handler в сочетании с ErrorException .
Пример страницы ErrorException :
set_error_handler("exception_error_handler"); /* Trigger exception */ strpos(); ?> Когда вы будете обрабатывать ошибки как исключения, вы можете сделать что-то вроде:
Я просто использую ‘file_exists ()’:
if (file_exists("must_have.php")) < require "must_have.php"; >else Лучшим подходом было бы сначала использовать путь realpath на пути. realpath вернет false если файл не существует.
$filename = realpath(getcwd() . "/fileERROR.php5"); $filename && return require($filename); trigger_error("Could not find file ", E_USER_ERROR); Вы даже можете создать свою собственную функцию require в пространстве имен вашего приложения, которое обертывает требуемую функцию PHP
namespace app; function require_safe($filename) < $path = realpath(getcwd() . $filename); $path && return require($path); trigger_error("Could not find file ", E_USER_ERROR); > Теперь вы можете использовать его в любом месте в ваших файлах
namespace app; require_safe("fileERROR.php5"); Я бы посоветовал вам взглянуть на последний комментарий в документации для функции set_error_handler () .
Он предлагает следующее как метод (и пример) улавливания фатальных ошибок:
register_shutdown_function('shutdown'); ini_set('max_execution_time',1 ); sleep(3); ?> Я не пробовал это предложение, но это можно было бы использовать в других фатальных сценариях ошибок.
Вам нужно использовать include (). Требовать (), когда он используется в несуществующем файле, приводит к фатальной ошибке и выходит из сценария, поэтому ваш die () не произойдет. Include () только предупреждает, а затем продолжает скрипт.
How to show errors and warnings in PHP
In this article, I am going to explain you about how to show errors in php.
By using below code we will display errors in php
ini_set('display_errors', 1); ini_set('display_startup_errors', 1); error_reporting(E_ALL); In php.ini by set display_errors as on by using below code.
- E_ALL: Catches all errors and warnings
- — E_CORE_ERROR: Fatal errors that occur during PHP’s initial startup (installation)
— E_ERROR: A fatal error that causes script termination
— E_USER_NOTICE: User-generated notice message.
— E_PARSE: Compile time parse error.
— E_NOTICE: Run time notice caused due to error in code
— E_USER_WARNING: User-generated warning message.
— E_WARNING: Run-time warning that does not cause script termination
— E_CORE_WARNING: Warnings that occur during PHP’s initial startup
— E_COMPILE_ERROR: Fatal compile-time errors indication problem with script.
— E_USER_ERROR: User-generated error message.
— E_STRICT: Run-time notices.
— E_RECOVERABLE_ERROR: Catchable fatal error indicating a dangerous error
Types of Errors in PHP
There are four basic types of runtime errors in PHP:
1. Fatal errors:
These are critical errors — for example, instantiating an object of a non-existent class, or calling a non-existent function. These errors cause the immediate termination of the script, and PHP’s default behavior is to display them to the user when they take place.
2. Notices:
These are small, non-critical errors that PHP encounters while executing a script — for example, accessing a variable that has not yet been defined. By default, such errors are not displayed to the user at all — although the default behavior can be changed.
3. Warnings:
Warnings are more severe errors like attempting to include() a file which does not exist. By default, these errors are displayed to the user, but they do not result in script termination.
4.Parse Error :
it’s syntax error or missing code error.
it will stop script execution.
Examples for Warnings and Fatal error:
Warnings in PHP are represented by E_WARNING. When these error occur execution of the script is not halted. For example,
by using include function added one php file but forgot to create this file in this root directoy we will get warnings.
Fatal error are represented by E_ERROR. By using require function added one php file but forgot include that file we got fatal error.
Simple example for warnings:
QA With Experts
How to show errors in php
include("dept.php");But i forgot include dept.php
i got below warning i got output.
see the below image for this example.
my sample php code as shown bleow
QA With Experts
How to show errors in php
But i forgot include dept.php in my code.
i got fatal error like this.
if you got fatal error our code terminated.So take care of this type of errors.
Here the functions include and require include one file into another file.
Difference between require, require_once, include and include_once
All these functions require, require_once, include and include_once are used to include the files in the php page but there is the slight difference between these functions.
Difference between require, require_once, include, include_once
Difference between require and include is that if the file you want to include is not found then include function give you a warning and executes the remaining code in of php page where you write the include function. While require gives you fatal error if the file you want to include is not found and the remaining code of the php page will not execute.
Example for include function:
By using this function we can include dept.php file in our php file.
Example for inclide_once function:
here include and include_once functions are same.but dept.php file included in our file multiple time it will include only one time.
Example for require function:
it is like include function.But the only difference is it returns the fatal error if included file missed as include function returns warnings.
Example for require_once function:
it is same as include_once funcitons.
Out of all require_once is best.
Then based on your requirement you can choose which you want to show :
For All Error, Warning and Notice
error_reporting(E_ALL); OR error_reporting(-1);For All Errors
For All Warnings
For All Notice
By Using htaccess we will display errors in php
see the bleow code in .htaccess
.htaccess: php_flag display_startup_errors on php_flag display_errors on php_flag html_errors on php_flag log_errors on php_value error_log /localhost/php_examples/PHP_errors.logBy using this function Send error messages to the web server’s error log
// Failed to connect to database tracking if error connecting to the database if (!mysqli_connect("localhost","root","password","qa_db")) if we got DB connection error in our error_log.txt file that error tacked like «Failed to connect ot MY DataBase!» as shown in the above example
By using following actions we will get errors info
1) Setting PHP error reporting to on in php.ini file
2) Setting PHP error reporting to on in .htaccess file
3) Getting information from error log file.
Comment’s
manish
I would like to explain it again, quickly.
To log php erros, within the php.ini file, you can set the following line of code to On to log errors or off to turn error logging off.
Using the php.ini, you can dictate where the error log will be located, based upon the location you provide.
This will place the error_log in the directory the error occurs in, as it is relative and not given a path.
; Log errors to specified file. error_log = error_logThis will place all PHP errors in the error_log file located in the directory you specify, as it is an absolute path to the file.
; Log errors to specified file. error_log = /path/to/site/error_logDisplaying Error:
For displaying single page error, you can use the ini_set() function to have them displayed. The syntax for this is as follows:
string ini_set ( string $varname , string $newvalue )This can be placed at the top of your PHP page with the error_reporting variable in it to allows error checking for that particular page.
You now need to, Navigate to the page you need to display error & place the code below
ini_set('display_errors', '1'); 1 = On, 0 = Off