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55 lines
1.8 KiB
PHP
55 lines
1.8 KiB
PHP
<?php
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declare(strict_types=1);
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namespace MRBS\Intl;
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use MRBS\Language;
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use MRBS\System;
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class LocaleSwitcher
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{
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private $category;
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private $locale;
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private $old_locale;
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public function __construct(int $category, string $locale)
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{
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$this->category = $category;
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$this->locale = $locale;
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}
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public function switch()
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{
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// It's not worth testing whether the new locale is the same as the old one, thereby saving us setting
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// the locale again. That's because setting the locale on Unix systems seems to be about 100 times
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// faster than on Windows. So on Unix systems, it's not worth worrying about. And on Windows, we have
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// to set the locale again anyway in case another script running in the same process has changed the
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// locale since we first set it. See the warning on the PHP manual page for setlocale():
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//
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// "The locale information is maintained per process, not per thread. If you are running PHP on a
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// multithreaded server API like IIS or Apache on Windows, you may experience sudden changes in locale
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// settings while a script is running, though the script itself never called setlocale(). This happens
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// due to other scripts running in different threads of the same process at the same time, changing the
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// process-wide locale using setlocale()."
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$this->old_locale = setlocale($this->category, '0');
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Language::setLocale($this->category, $this->locale);
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}
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public function restore()
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{
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if (!isset($this->old_locale))
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{
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throw new \RuntimeException("switch() must be called before restore().");
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}
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if (false === setlocale($this->category, $this->old_locale))
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{
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// Shouldn't happen as the old locale was what the system told us it was.
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throw new \RuntimeException("Could not restore locale to '" . $this->old_locale . "'");
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}
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}
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}
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