Character type checking
- Introduction
- Installing/Configuring
- Predefined Constants
- Ctype Functions
- ctype_alnum — Check for alphanumeric character(s)
- ctype_alpha — Check for alphabetic character(s)
- ctype_cntrl — Check for control character(s)
- ctype_digit — Check for numeric character(s)
- ctype_graph — Check for any printable character(s) except space
- ctype_lower — Check for lowercase character(s)
- ctype_print — Check for printable character(s)
- ctype_punct — Check for any printable character which is not whitespace or an alphanumeric character
- ctype_space — Check for whitespace character(s)
- ctype_upper — Check for uppercase character(s)
- ctype_xdigit — Check for character(s) representing a hexadecimal digit
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