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<?php |
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/* |
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* citeproc-php |
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* |
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* @link http://github.com/seboettg/citeproc-php for the source repository |
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* @copyright Copyright (c) 2016 Sebastian Böttger. |
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* @license https://opensource.org/licenses/MIT |
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*/ |
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namespace Seboettg\CiteProc; |
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use Seboettg\CiteProc\Exception\CiteProcException; |
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/** |
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* Class StyleSheet |
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* |
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* Helper class for loading CSL styles and CSL locales |
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* |
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* @package Seboettg\CiteProc |
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* @author Sebastian Böttger <[email protected]> |
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*/ |
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class StyleSheet |
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{ |
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/** |
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* Loads xml formatted CSL stylesheet of a given stylesheet name, e.g. "american-physiological-society" for |
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* apa style. |
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* |
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* See in styles folder (which is included as git submodule) for all available style sheets |
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* |
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* @param string $styleName e.g. "american-physiological-society" for apa |
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* @return string |
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* @throws CiteProcException |
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*/ |
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public static function loadStyleSheet($styleName) |
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{ |
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$stylesPath = self::vendorPath() . "/citation-style-language/styles-distribution/"; |
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return file_get_contents($stylesPath . $styleName . '.csl'); |
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} |
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/** |
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* Loads xml formatted locales of given language key |
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* |
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* @param string $langKey e.g. "en-US", or "de-CH" |
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* @return string |
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* @throws CiteProcException |
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*/ |
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public static function loadLocales($langKey) |
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{ |
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$localesPath = self::vendorPath() . "/citation-style-language/locales/"; |
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$localeFile = $localesPath . "locales-" . $langKey . '.xml'; |
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if (file_exists($localeFile)) { |
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$data = file_get_contents($localeFile); |
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} else { |
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$metadata = self::loadLocalesMetadata(); |
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if (!empty($metadata->{'primary-dialects'}->{$langKey})) { |
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$data = file_get_contents($localesPath . "locales-" . $metadata->{'primary-dialects'}->{$langKey} . '.xml'); |
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} |
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} |
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return $data; |
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} |
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public static function loadLocalesMetadata() |
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{ |
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$localesMetadataPath = self::vendorPath() . "/citation-style-language/locales/locales.json"; |
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return json_decode(file_get_contents($localesMetadataPath)); |
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} |
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/** |
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* @return bool|string |
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* @throws CiteProcException |
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*/ |
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private static function vendorPath() |
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{ |
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include_once __DIR__ . '/../../../vendorPath.php'; |
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if (!($vendorPath = vendorPath())) { |
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// @codeCoverageIgnoreStart |
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throw new CiteProcException('vendor path not found. Use composer to initialize your project'); |
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// @codeCoverageIgnoreEnd |
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} |
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return $vendorPath; |
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} |
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} |
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seboettg /
citeproc-php
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: