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<?php
/**
 * Defines a set of specialized string functions.
 *
 * @package PhpMyAdmin-String
 */
interface PMA_StringType
{
    /**
     * Checks if a character is an alphanumeric one
     *
     * @param string $c character to check for
     *
     * @return boolean whether the character is an alphanumeric one or not
     */
    public function isAlnum($c);

    /**
     * Checks if a character is an alphabetic one
     *
     * @param string $c character to check for
     *
     * @return boolean whether the character is an alphabetic one or not
     */
    public function isAlpha($c);

    /**
     * Checks if a character is a digit
     *
     * @param string $c character to check for
     *
     * @return boolean whether the character is a digit or not
     */
    public function isDigit($c);

    /**
     * Checks if a character is an upper alphabetic one
     *
     * @param string $c character to check for
     *
     * @return boolean whether the character is an upper alphabetic one or not
     */
    public function isUpper($c);


    /**
     * Checks if a character is a lower alphabetic one
     *
     * @param string $c character to check for
     *
     * @return boolean whether the character is a lower alphabetic one or not
     */
    public function isLower($c);

    /**
     * Checks if a character is a space one
     *
     * @param string $c character to check for
     *
     * @return boolean whether the character is a space one or not
     */
    public function isSpace($c);

    /**
     * Checks if a character is an hexadecimal digit
     *
     * @param string $c character to check for
     *
     * @return boolean whether the character is an hexadecimal digit or not
     */
    public function isHexDigit($c);

    /**
     * Checks if a number is in a range
     *
     * @param integer $num   number to check for
     * @param integer $lower lower bound
     * @param integer $upper upper bound
     *
     * @return boolean  whether the number is in the range or not
     */
    public function numberInRangeInclusive($num, $lower, $upper);
}
?>