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<?php |
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declare(strict_types=1); |
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namespace Xparse\Parser\Helper; |
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/** |
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* Try to convert input encoding |
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* |
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* @author Ivan Shcherbak <[email protected]> |
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*/ |
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class ToUtfConverter implements EncodingConverterInterface |
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{ |
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/** |
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* @var null|string[] |
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*/ |
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private $supportedEncodings; |
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public function convert(string $html, string $contentType = ''): string |
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{ |
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$encoding = ''; |
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if (preg_match('!^.*charset=([A-Za-z0-9-]{4,})$!', $contentType, $contentTypeData) === 1) { |
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$encoding = $contentTypeData[1]; |
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} elseif (preg_match("!.*<meta.*charset=[\"']?[ \t]*([A-Za-z0-9-]{4,})[ \t]*[\"']!mi", $html, $metaContentType) === 1) { |
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$encoding = $metaContentType[1]; |
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} |
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$encoding = strtolower($encoding); |
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if ($encoding !== '' && in_array($encoding, $this->getSupportedEncodings(), true)) { |
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$html = mb_convert_encoding($html, 'utf-8', $encoding); |
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} |
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return $html; |
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} |
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/** |
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*/ |
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private function getSupportedEncodings(): array |
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{ |
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if ($this->supportedEncodings === null) { |
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$this->supportedEncodings = []; |
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$findAliases = function_exists('mb_encoding_aliases'); |
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foreach (mb_list_encodings() as $encoding) { |
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$encoding = strtolower($encoding); |
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if ($encoding !== 'utf-8' && $encoding !== 'utf8') { |
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$this->supportedEncodings[] = $encoding; |
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if ($findAliases) { |
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foreach (mb_encoding_aliases($encoding) as $encodingAlias) { |
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$encodingAlias = strtolower($encodingAlias); |
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$this->supportedEncodings[] = $encodingAlias; |
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} |
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} |
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} |
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} |
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} |
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return $this->supportedEncodings; |
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} |
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} |
xparse /
Parser
