Php write mysql error to file

How to write mysql php errors to a text file

I have the following PHP code that creates a mysql connection:

$link = mysqli_connect("$mysql_server", "$mysql_user", "$mysql_pw", "$mysql_db"); if (!$link) Copy code

In the event the connection is not made, how can I write the error to a text file on my server?

Answer

Solution:

Yes it is possible with error_log function in php

$con = mysqli_connect("$mysql_server", "$mysql_user", "$mysql_pw", "$mysql_db"); if (!$con) < error_log(mysqli_error($con) . "\n", 3, "/var/tmp/my-errors.log"); >Copy code

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PHP

PHP (from the English Hypertext Preprocessor — hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites. The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
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DBMS is a database management system. It is designed to change, search, add and delete information in the database. There are many DBMSs designed for similar purposes with different features. One of the most popular is MySQL. It is a software tool designed to work with relational SQL databases. It is easy to learn even for site owners who are not professional programmers or administrators. MySQL DBMS also allows you to export and import data, which is convenient when moving large amounts of information.
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PHP записывает ошибку MySQL в файл

Как мне записать ошибку MySQL в файл вместо того, чтобы отображать ее пользователю?

вот что у меня есть на данный момент .

if (!mysql_query($sql_query,$connection)) < die('Error: ' . mysql_error()); >echo "Success!"; 

попробуйте записать эту mysql_error() в файл. как? проверьте манипулирование файлами php .. — Gntem

3 ответы

Вы можете использовать функция error_log в php для этого.

error_log("You messed up!", 3, "/var/tmp/my-errors.log"); 

Изменить: так что в вашем случае это будет выглядеть следующим образом (хотя я бы использовал другой оператор if)

if (!mysql_query($sql_query,$connection)) < error_log(mysql_error() . "\n", 3, "/var/tmp/my-errors.log"); >echo "Success!"; 

Не забывайте mysql_error() сообщение и \n поскольку режим 3 не разрывает строки сам по себе. — Майкл Берковски

Используйте error_log или Еореп/fwrite/fclose/и т.д.

Я часто использую создание собственного обработчика ошибок с чем-то вроде set_error_handler в PHP и использовать trigger_error чтобы зафиксировать ВСЕ ошибки и записать их в файл. Это может быть лучшим сценарием для вас; вместо того, чтобы писать многочисленные error_log(), вы можете просто создать функцию обработчика ошибок, а затем использовать trigger_error.

Во-первых, вы не должны использовать die, если не хотите показывать пользователю свое сообщение об ошибке.

Во-вторых, вместо того, чтобы использовать die, вы должны записать свое сообщение об ошибке в файл. Если вы используете какую-либо библиотеку ведения журналов, вы можете вывести ошибку в какой-либо журнал, иначе вы можете взглянуть на обработку файлов в PHP.

И вам придется использовать mysql_error(), чтобы получить сообщение об ошибке, которое должно быть записано в файл! — пирометр

Не тот ответ, который вы ищете? Просмотрите другие вопросы с метками php mysql or задайте свой вопрос.

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PHP Write MySQL Error To File

a. Log files count Limit the number of the error log files before they are recycled Check to limit the number of error logs created before they are recycled. Maximum number of error log files Specify the maximum number of archived error log files created before they are recycled.

PHP Write MySQL Error To File

You can use the error_log function in php for that.

error_log("You messed up!", 3, "/var/tmp/my-errors.log"); 

Edit: so in your case this would look like the following (although i would use a different if statement)

if (!mysql_query($sql_query,$connection)) < error_log(mysql_error() . "\n", 3, "/var/tmp/my-errors.log"); >echo "Success!"; 

Use error_log, or fopen/fwrite/fclose/etc.

I often use create my own error handler with something like set_error_handler in PHP and use trigger_error to capture ALL errors and write them to file. This may be a better scenario for you; rather than writing numerous error_log()’s, you can just create an error handler function and then use trigger_error.

Firstly, you should not use die if you do not want to display your error message to the user.

Secondly, instead of using die, you must log your error message into a file. If you are using some logging library, you may output the error to some log, else you may want to have a look at file handling in php.

How to create a logfile in php, the code isn’t safe against concurrent writes, if there’s 2 scripts trying to write to the log at the same time, and script 1 has so much data that not all of the data is written in a single write() (whereupon file_put_contents will automatically do a 2nd write() to try to write the remaining data), and script #2 write its log after the 1’st scripts 1st write, but before script1’s 2nd write Code sample$securityDAO = $this->getDAO(‘SecurityDAO’);$result = $securityDAO->hasAccess($form);$log = «User: «.$_SERVER[‘REMOTE_ADDR’].’ — ‘.date(«F j, Y, g:i a»).PHP_EOL.»Attempt: «.($result[0][‘success’]==’1′?’Success’:’Failed’).PHP_EOL.»User: «.$username.PHP_EOL.Feedback

Create LOG for tables in SQL Server

You’ve coded for single row updates and deletes. Think sets!

CREATE TRIGGER SampleTrigger ON Sample after INSERT, UPDATE, DELETE AS SET NOCOUNT ON; insert into SampleLog (ID,Name,Date,UserName,Type) SELECT D.ID, D.NAME, GETDATE(), SYSTEM_USER, CASE WHEN I.ID IS NULL THEN 'D' ELSE 'U' END FROM DELETED D LEFT JOIN INSERTED I ON D.ID = I.ID UNION ALL SELECT I.ID, I.NAME, GETDATE(), SYSTEM_USER, 'I' FROM INSERTED I LEFT JOIN DELETED D ON D.ID = I.ID WHERE D.ID IS NULL GO 

How to log errors and warnings into a file in php?, log_errors = on error_log = ./errors.log Note: : This approach is not highly reliable as compared to other approaches. Its better to use approach 1 as it gives flexibility of choosing different files for logging at same time without changing configuration of php.ini file.

SCM Services — Configure SQL Server Error Logs

Applies to: SQL Server (all supported versions)

This topic describes how to view or modify the way SQL Server error logs are recycled.

To open the Configure SQL Server Error Logs dialog box

1. In Object Explorer, expand the instance of SQL Server, expand Management , right-click SQL Server Logs , and then click Configure .
2. In the Configure SQL Server Error Logs dialog box, choose from the following options. a. Log files count Limit the number of the error log files before they are recycled Check to limit the number of error logs created before they are recycled. A new error log is created each time an instance of SQL Server is started. SQL Server retains backups of the previous six logs, unless you check this option, and specify a different maximum number of error log files below. Maximum number of error log files Specify the maximum number of archived error log files created before they are recycled. The default is 6, not including the current one. This value determines the number of previous backup logs that SQL Server retains before recycling them. b. Log file size Maximum size for error log file in KB You can set the size amount of each file in KB. If you leave it at 0 the log size is unlimited.

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