For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 24 and the first side effect is on line 30.
The PSR-1: Basic Coding Standard recommends that a file should either introduce
new symbols, that is classes, functions, constants or similar, or have side effects.
Side effects are anything that executes logic, like for example printing output,
changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state
of an application. It also promotes a cleaner style of programming and makes your code
less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the
PSR-1.
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/**
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* webtrees: online genealogy
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* Copyright (C) 2017 webtrees development team
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace Fisharebest\Webtrees;
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use PDO;
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use PDOException;
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// This script does not load session.php.
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// session.php won’t run until a configuration file and database connection exist...
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// This next block of code is a minimal version of session.php
<h1><?= I18N::translate('This website is temporarily unavailable') ?></h1>
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<div class="content">
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<p>
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<?= I18N::translate('Oops! The webserver is unable to connect to the database server. It could be busy, undergoing maintenance, or simply broken. You should <a href="index.php">try again</a> in a few minutes or contact the website administrator.') ?>
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</p>
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<?= $messages ?>
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<?= I18N::translate('If you are the website administrator, you should check that:') ?>
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<ol>
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<li>
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<?= /* I18N: [you should check that:] ... */ I18N::translate('the database connection settings in the file “/data/config.ini.php” are still correct') ?>
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</li>
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<li>
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<?= /* I18N: [you should check that:] ... */ I18N::translate('the folder “/data” and the file “/data/config.ini.php” have access permissions that allow the webserver to read them') ?>
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</li>
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<li>
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<?= /* I18N: [you should check that:] ... */ I18N::translate('you can connect to the database using other applications, such as phpmyadmin') ?>
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</li>
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</ol>
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<p class="good">
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<?= I18N::translate('If you cannot resolve the problem yourself, you can ask for help on the forums at <a href="https://webtrees.net">webtrees.net</a>.') ?>
fisharebest /
webtrees
Greg Roach
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.