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<?php declare(strict_types=1); |
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/** |
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* @package s9e\RegexpBuilder |
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* @copyright Copyright (c) 2016-2022 The s9e authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\RegexpBuilder; |
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class Escaper |
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{ |
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/** |
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* @var array<string> Characters to escape in a character class |
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*/ |
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public $inCharacterClass = ['-' => '\\-', '\\' => '\\\\', ']' => '\\]', '^' => '\\^']; |
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/** |
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* @var array<string> Characters to escape outside of a character class |
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*/ |
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public $inLiteral = [ |
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'$' => '\\$', '(' => '\\(', ')' => '\\)', '*' => '\\*', |
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'+' => '\\+', '.' => '\\.', '?' => '\\?', '[' => '\\[', |
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'\\' => '\\\\', '^' => '\\^', '{' => '\\{', '|' => '\\|' |
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]; |
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/** |
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* @param string $delimiter Delimiter used in the final regexp |
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*/ |
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public function __construct(string $delimiter = '/') |
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{ |
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foreach (str_split($delimiter, 1) as $char) |
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{ |
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$this->inCharacterClass[$char] = '\\' . $char; |
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$this->inLiteral[$char] = '\\' . $char; |
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} |
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} |
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/** |
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* Escape given character to be used in a character class |
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* |
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* @param string $char Original character |
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* @return string Escaped character |
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*/ |
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public function escapeCharacterClass(string $char): string |
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{ |
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return $this->inCharacterClass[$char] ?? $char; |
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} |
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/** |
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* Escape given character to be used outside of a character class |
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* |
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* @param string $char Original character |
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* @return string Escaped character |
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*/ |
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public function escapeLiteral(string $char): string |
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{ |
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return $this->inLiteral[$char] ?? $char; |
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} |
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} |
s9e /
RegexpBuilder
