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php中 被遗忘的函数

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Release: 2016-06-21 09:06:59
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函数

ctype_alnum -- Check for alphanumeric character(s)

检测是否是只包含[A-Za-z0-9]

ctype_alpha -- Check for alphabetic character(s)

检测是否是只包含[A-Za-z]

 

ctype_cntrl -- Check for control character(s)

检查是否是只包含类是\r\b\t”之类的字符控制字符

 

ctype_digit -- Check for numeric character(s)

检查时候是只包含数字字符的字符串(0-9

 

ctype_graph -- Check for any printable character(s) except space

检查是否是只包含有可以打印出来的字符(除了空格)的字符串

 

ctype_lower -- Check for lowercase character(s)

检查是否所有的字符都是英文字母,并且都是小写

 

ctype_print -- Check for printable character(s)

检查是否是只包含有可以打印出来的字符的字符串

 

ctype_punct --  Check for any printable character which is not whitespace or an alphanumeric character

检查是否是只包含非数字/字符/空格的可打印出来的字符

 

ctype_space -- Check for whitespace character(s)

检查是否是只包含类是\r\b\t”之类的字符和空格

 

ctype_upper -- Check for uppercase character(s)

检查是否所有的字符都是英文字母,并且都是大写

 

ctype_xdigit --  Check for character(s) representing a hexadecimal digit

检查是否是16进制的字符串,只能包括“0123456789abcdef



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