$needles Needles to check if any of them are part of the haystack * * @example StringUtils::contains('This string', ['This', 'test']); // true * * @return bool The function returns true if any of the needles is part of the haystack, false otherwise. * * @since 1.0.0 */ public static function contains(string $haystack, array $needles) : bool { foreach ($needles as $needle) { if (\strpos($haystack, $needle) !== false) { return true; } } return false; } /** * Check if a string contains any of the provided needles (case sensitive). * * The validation is done case sensitive. * * @param string $haystack Haystack * @param array $needles Needles to check if any of them are part of the haystack * * @example StringUtils::mb_contains('This string', ['This', 'test']); // true * * @return bool The function returns true if any of the needles is part of the haystack, false otherwise. * * @since 1.0.0 */ public static function mb_contains(string $haystack, array $needles) : bool { foreach ($needles as $needle) { if (\mb_strpos($haystack, $needle) !== false) { return true; } } return false; } /** * Tests if a string ends with a certain string (case sensitive). * * The validation is done case sensitive. The function takes strings or an array of strings for the validation. * In case of an array the function will test if any of the needles is at the end of the haystack string. * * @param string $haystack Haystack * @param array|string $needles Needles to check if they are at the end of the haystack. * * @example StringUtils::endsWith('Test string', ['test1', 'string']); // true * * @return bool The function returns true if any of the needles is at the end of the haystack, false otherwise. * * @since 1.0.0 */ public static function endsWith(string $haystack, $needles) : bool { if (\is_string($needles)) { $needles = [$needles]; } foreach ($needles as $needle) { if ($needle === '' || (($temp = \strlen($haystack) - \strlen($needle)) >= 0 && \strpos($haystack, $needle, $temp) !== false)) { return true; } } return false; } /** * Tests if a string starts with a certain string (case sensitive). * * The validation is done case sensitive. The function takes strings or an array of strings for the validation. * In case of an array the function will test if any of the needles is at the beginning of the haystack string. * * @param string $haystack Haystack * @param array|string $needles Needles to check if they are at the beginning of the haystack. * * @example StringUtils::startsWith('Test string', ['Test', 'something']); // true * @example StringUtils::startsWith('Test string', 'string'); // false * @example StringUtils::startsWith('Test string', 'Test'); // true * * @return bool The function returns true if any of the needles is at the beginning of the haystack, false otherwise. * * @since 1.0.0 */ public static function startsWith(string $haystack, $needles) : bool { if (\is_string($needles)) { $needles = [$needles]; } foreach ($needles as $needle) { if ($needle === '' || strrpos($haystack, $needle, -strlen($haystack)) !== false) { return true; } } return false; } /** * Tests if a multi byte string starts with a certain string (case sensitive). * * The validation is done case sensitive. The function takes strings or an array of strings for the validation. * In case of an array the function will test if any of the needles is at the beginning of the haystack string. * * @param string $haystack Haystack * @param array|string $needles Needles to check if they are at the beginning of the haystack. * * @return bool The function returns true if any of the needles is at the beginning of the haystack, false otherwise. * * @since 1.0.0 */ public static function mb_startsWith(string $haystack, $needles) : bool { if (\is_string($needles)) { $needles = [$needles]; } foreach ($needles as $needle) { if ($needle === '' || \mb_strrpos($haystack, $needle, -\mb_strlen($haystack)) !== false) { return true; } } return false; } /** * Tests if a multi byte string ends with a certain string (case sensitive). * * The validation is done case sensitive. The function takes strings or an array of strings for the validation. * In case of an array the function will test if any of the needles is at the end of the haystack string. * * @param string $haystack Haystack * @param array|string $needles Needles to check if they are at the end of the haystack. * * @example StringUtils::endsWith('Test string', ['test1', 'string']); // true * @example StringUtils::endsWith('Test string', 'string'); // true * @example StringUtils::endsWith('Test string', String); // false * * @return bool The function returns true if any of the needles is at the end of the haystack, false otherwise. * * @since 1.0.0 */ public static function mb_endsWith(string $haystack, $needles) : bool { if (\is_string($needles)) { $needles = [$needles]; } foreach ($needles as $needle) { if ($needle === '' || (($temp = \mb_strlen($haystack) - \mb_strlen($needle)) >= 0 && mb_strpos($haystack, $needle, $temp) !== false)) { return true; } } return false; } /** * Makes first letter of a multi byte string upper case. * * @param string $string String to upper case first letter. * * @return string Multi byte string with first character as upper case. * * @since 1.0.0 */ public static function mb_ucfirst(string $string) : string { $strlen = \mb_strlen($string); $firstChar = \mb_substr($string, 0, 1); $then = \mb_substr($string, 1, $strlen - 1); return mb_strtoupper($firstChar) . $then; } /** * Makes first letter of a multi byte string lower case. * * @param string $string String to lower case first letter. * * @return string Multi byte string with first character as lower case. * * @since 1.0.0 */ public static function mb_lcfirst(string $string) : string { $strlen = \mb_strlen($string); $firstChar = \mb_substr($string, 0, 1); $then = \mb_substr($string, 1, $strlen - 1); return mb_strtolower($firstChar) . $then; } /** * Trim multi byte characters from a multi byte string. * * @param string $string Multi byte string to trim multi byte characters from. * @param string $charlist Multi byte character list used for trimming * * @return string Trimmed multi byte string. * * @since 1.0.0 */ public static function mb_trim(string $string, string $charlist = ' ') : string { if ($charlist === ' ') { return \trim($string); } else { $charlist = \str_replace('/', '\/', \preg_quote($charlist)); return \preg_replace('/(^[' . $charlist . ']+)|([ ' . $charlist . ']+$)/us', '', $string); } } /** * Trim multi byte characters from the right of a multi byte string. * * @param string $string Multi byte string to trim multi byte characters from. * @param string $charlist Multi byte character list used for trimming * * @return string Trimmed multi byte string. * * @since 1.0.0 */ public static function mb_rtrim(string $string, string $charlist = ' ') : string { if ($charlist === ' ') { return \rtrim($string); } else { $charlist = \str_replace('/', '\/', \preg_quote($charlist)); return \preg_replace('/([' . $charlist . ']+$)/us', '', $string); } } /** * Trim multi byte characters from the left of a multi byte string. * * @param string $string Multi byte string to trim multi byte characters from. * @param string $charlist Multi byte character list used for trimming * * @return string Trimmed multi byte string. * * @since 1.0.0 */ public static function mb_ltrim(string $string, string $charlist = ' ') : string { if ($charlist === ' ') { return \ltrim($string); } else { $charlist = \str_replace('/', '\/', \preg_quote($charlist)); return \preg_replace('/(^[' . $charlist . ']+)/us', '', $string); } } /** * Count occurences of character at the beginning of a string. * * @param string $string String to analyze. * @param string $character Character to count at the beginning of the string. * * @example StringUtils::countCharacterFromStart(' Test string', ' '); // 4 * @example StringUtils::countCharacterFromStart(' Test string', 's'); // 0 * * @return int The amount of repeating occurences at the beginning of the string. * * @since 1.0.0 */ public static function countCharacterFromStart(string $string, string $character) : int { $count = 0; $length = \strlen($string); for ($i = 0; $i < $length; ++$i) { if ($string[$i] !== $character) { break; } $count++; } return $count; } /** * Calculate string entropy * * @param string $value String to analyze. * * @return float * * @since 1.0.0 */ public static function getEntropy(string $value) : float { $entroy = 0.0; $size = \mb_strlen($value); $countChars = self::mb_count_chars($value); foreach ($countChars as $v) { $p = $v / $size; $entroy -= $p * \log($p) / \log(2); } return $entroy; } /** * Count chars of utf-8 string. * * @param string $input String to count chars. * * @return array * * @since 1.0.0 */ public static function mb_count_chars(string $input) : array { $l = \mb_strlen($input, 'UTF-8'); $unique = []; for ($i = 0; $i < $l; ++$i) { $char = \mb_substr($input, $i, 1, 'UTF-8'); if (!\array_key_exists($char, $unique)) { $unique[$char] = 0; } $unique[$char]++; } return $unique; } /** * Turn value into string * * @param mixed $element Value to stringify. * * @return null|string * * @since 1.0.0 */ public static function stringify($element) : ?string { if ($element instanceof \JsonSerializable || \is_array($element)) { $encoded = \json_encode($element); return $encoded ? $encoded : null; } elseif ($element instanceof \Serializable) { return $element->serialize(); } elseif (\is_string($element)) { return $element; } elseif (\is_int($element) || \is_float($element)) { return (string) $element; } elseif (\is_bool($element)) { return $element ? '1' : '0'; } elseif ($element === null) { return null; } elseif ($element instanceof \DateTime) { return $element->format('Y-m-d H:i:s'); } else { return $element->__toString(); } } }