ctype函数

PHP ctype_upper()函数 (PHP ctype_upper() function)

ctype_upper() function is a character type (CType) function in PHP, it is used to check whether a given string contains all uppercase characters or not.

ctype_upper()函数是PHP中的字符类型(CType)函数，用于检查给定的字符串是否包含所有大写字符。

It returns true, if all characters of the given strings are in uppercase, else it returns false.

它返回true，如果给定字符串的所有字符都是大写的，否则返回FALSE。

Syntax:

句法：

ctype_upper(string) : bool

Example:

例：

Input: "HELLO"    Output: true    Input: "HELLO WORLD"    Output: false    Input: "Hello"    Output: false

PHP code:

PHP代码：

Output

输出量

HELLO contains all uppercase characters.HELLO WORLD does not contain all uppercase characters.HELLO123 does not contain all uppercase characters.Hello does not contain all uppercase characters.

翻译自:

ctype函数