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PHP Manual :: Ctype Functions



Predefined Constants || ctype_alnum || Ctype || PHP Manual

  • 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


Predefined Constants || ctype_alnum || Ctype || PHP Manual
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