A set of macros for a character type is defined in the header file, ctype.h, to give the type of the given character.
And there are no related functions in PHP. A few days ago, we found an extension library called Php_ctype.dll in PHP www.mm4.de downloaded.
After loading found to provide some of these functions, special collation out for your reference.
After loading the Php_ctype.dll file correctly in PHP, use the You can see the following information:
CType functions enabled (experimental)
You can then use the functions it provides. The use of all functions is basically the same as C + +, except that the parameters of the function in C + + are
Character type (char), whereas in PHP the arguments to a function can be strings (string). For example:
$string = "123ADAADAD";
if (Isalnum ($string))
echo "only uppercase and lowercase letters and numbers! ";
Attached: functions supported by Php_ctype.dll
BOOL Isalnum (String)
BOOL Isalpha (String)
BOOL Iscntrl (String)
BOOL IsDigit (String)
BOOL Isgraph (String)
BOOL Islower (String)
BOOL Isprint (String)
BOOL Ispunct (String)
BOOL Isspace (String)
BOOL Isupper (String)
BOOL Isxdigit (String)
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