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<?php /** * Removes the diacritical marks from a string. * * Diacritical marks: {@link https://unicode-table.com/blocks/combining-diacritical-marks/} * * @param string $string The string from which to strip the diacritical marks. * @return string Stripped string. */ function stripDiacriticalMarks(string $string): string { return preg_replace('/[\x{0300}-\x{036f}]/u', '', \Normalizer::normalize($string , \Normalizer::FORM_KD)); } /** * Checks if the string $haystack is like $needle, $needle can contain '%' and '_' * characters which will behave as if used in a SQL LIKE condition. Character escaping * is supported with '\'. * * @param string $haystack The string to check if it is like $needle * @param string $needle The string used to check if $haystack is like it * @param bool $ai Whether to check likeness in an accent-insensitive manner * @param bool $ci Whether to check likeness in a case-insensitive manner * @return bool True if $haystack is like $needle, otherwise, false */ function like(string $haystack, string $needle, bool $ai = true, bool $ci = true): bool { if ($ai) { $haystack = stripDiacriticalMarks($haystack); $needle = stripDiacriticalMarks($needle); } $needle = preg_quote($needle, '/'); $tokens = []; $needleLength = strlen($needle); for ($i = 0; $i < $needleLength;) { if ($needle[$i] === '\\') { $i += 2; if ($i < $needleLength) { if ($needle[$i] === '\\') { $tokens[] = '\\\\'; $i += 2; } else { $tokens[] = $needle[$i]; ++$i; } } else { $tokens[] = '\\\\'; } } else { switch ($needle[$i]) { case '_': $tokens[] = '.'; break; case '%': $tokens[] = '.*'; break; default: $tokens[] = $needle[$i]; break; } ++$i; } } return preg_match('/^' . implode($tokens) . '$/u' . ($ci ? 'i' : ''), $haystack) === 1; } /** * Escapes a string in a way that `UString::like` will match it as-is, thus '%' and '_' * would match a literal '%' and '_' respectively (and not behave as in a SQL LIKE * condition). * * @param string $str The string to escape. * @return string The escaped string. */ function escapeLike(string $str): string { return strtr($str, ['\\' => '\\\\', '%' => '\%', '_' => '\_']); } var_dump(like('Hello 🙃', 'Hello _')); var_dump(like('Hello 🙃', '_e%o__')); var_dump(like('asdfas \\🙃H\\\\%🙃É\\l\\_🙃\\l\\o asdfasf', '%' . escapeLike('\\🙃h\\\\%🙃e\\l\\_🙃\\l\\o') . '%'));