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<?php |
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/** |
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* webtrees: online genealogy |
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* Copyright (C) 2024 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 <https://www.gnu.org/licenses/>. |
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*/ |
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declare(strict_types=1); |
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namespace Fisharebest\Webtrees; |
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use Illuminate\Database\Capsule\Manager as DB; |
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use Illuminate\Database\Query\Expression; |
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/** |
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* SQL GROUP_CONCAT function. |
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*/ |
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class GroupConcat extends Expression |
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{ |
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public function __construct(string $expression, string $separator = ',', string $order_by = '', string $alias = '') |
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{ |
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$quoted_expression = DB::getTheConnection()->getSchemaGrammar()->wrap($expression); |
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$quoted_separator = DB::getTheConnection()->getPdo()->quote($separator); |
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$quoted_order_by = DB::getTheConnection()->getSchemaGrammar()->wrap($order_by); |
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switch (DB::getTheConnection()->getDriverName()) { |
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case 'sqlsrv': |
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$sql = 'STRING_AGG(' . $quoted_expression . ',' . $quoted_separator . ') WITHIN GROUP (ORDER BY ' . $quoted_order_by . ' ASC)'; |
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break; |
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default: |
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$sql = 'GROUP_CONCAT(' . $quoted_expression . ',' . $quoted_separator . ' ORDER BY ' . $quoted_order_by . ')'; |
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break; |
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} |
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if ($alias !== '') { |
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$sql .= ' AS ' . DB::getTheConnection()->getSchemaGrammar()->wrap($alias); |
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} |
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parent::__construct($sql); |
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} |
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} |
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fisharebest /
webtrees
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: