Ctype 函数

Table of Contents

• 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