* The tested string. *
* @return bool TRUE if every character in text is * a letter from the current locale, FALSE otherwise. */ #[Pure] function ctype_alpha(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for control character(s) * @link https://php.net/manual/en/function.ctype-cntrl.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text is * a control character from the current locale, FALSE otherwise. */ #[Pure] function ctype_cntrl(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for numeric character(s) * @link https://php.net/manual/en/function.ctype-digit.php * @param string $text* The tested string. *
* @return bool TRUE if every character in the string * text is a decimal digit, FALSE otherwise. */ #[Pure] function ctype_digit(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for lowercase character(s) * @link https://php.net/manual/en/function.ctype-lower.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text is * a lowercase letter in the current locale. */ #[Pure] function ctype_lower(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for any printable character(s) except space * @link https://php.net/manual/en/function.ctype-graph.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text is * printable and actually creates visible output (no white space), FALSE * otherwise. */ #[Pure] function ctype_graph(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for printable character(s) * @link https://php.net/manual/en/function.ctype-print.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text * will actually create output (including blanks). Returns FALSE if * text contains control characters or characters * that do not have any output or control function at all. */ #[Pure] function ctype_print(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for any printable character which is not whitespace or an * alphanumeric character * @link https://php.net/manual/en/function.ctype-punct.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text * is printable, but neither letter, digit or blank, FALSE otherwise. */ #[Pure] function ctype_punct(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for whitespace character(s) * @link https://php.net/manual/en/function.ctype-space.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text * creates some sort of white space, FALSE otherwise. Besides the * blank character this also includes tab, vertical tab, line feed, * carriage return and form feed characters. */ #[Pure] function ctype_space(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for uppercase character(s) * @link https://php.net/manual/en/function.ctype-upper.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text is * an uppercase letter in the current locale. */ #[Pure] function ctype_upper(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {} /** * Check for character(s) representing a hexadecimal digit * @link https://php.net/manual/en/function.ctype-xdigit.php * @param string $text* The tested string. *
* @return bool TRUE if every character in text is * a hexadecimal 'digit', that is a decimal digit or a character from * [A-Fa-f] , FALSE otherwise. */ #[Pure] function ctype_xdigit(#[LanguageLevelTypeAware(['8.1' => 'string'], default: 'mixed')] mixed $text): bool {}