Function | Details |
ctype_alnum() | Checking alphanumeric characters |
ctype_alpha() | Checking for alphabetic characters |
ctype_xdigit() | Checking for hexadecimal characters and digits |
ctype_cntrl() | Checking for control characters |
ctype_digit() | Checking for numeric characters |
ctype_graph() | Checking for any printable characters except space |
ctype_lower() | Checking for all lower case characters |
ctype_print() | Checking for all printable characters |
ctype_punct() | Checking for all punctuation characters |
ctype_space() | Checking for all whitespace character(s) |
ctype_upper() | Checking for all upper case characters |