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IntlChar::isupper

(PHP 7)

IntlChar::isupperCheck if code point has the general category "Lu" (uppercase letter)

说明

public static bool IntlChar::isupper ( mixed $codepoint )

Determines whether the specified code point has the general category "Lu" (uppercase letter).

Note:

This misses some characters that are also uppercase but have a different general category value. In order to include those, use IntlChar::isUUppercase() .

参数

codepoint

The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")

返回值

Returns TRUE if codepoint is an Lu uppercase letter, FALSE if not.

范例

Example #1 Testing different code points

<?php
var_dump
( IntlChar :: isupper ( "A" ));
var_dump ( IntlChar :: isupper ( "a" ));
var_dump ( IntlChar :: isupper ( "Φ" ));
var_dump ( IntlChar :: isupper ( "φ" ));
var_dump ( IntlChar :: isupper ( "1" ));
?>

以上例程会输出:

bool(true)
bool(false)
bool(true)
bool(false)
bool(false)

参见

  • IntlChar::islower() - Check if code point is a lowercase letter
  • IntlChar::istitle() - Check if code point is a titlecase letter
  • IntlChar::tolower() - Make Unicode character lowercase
  • IntlChar::toupper() - Make Unicode character uppercase
  • IntlChar::PROPERTY_UPPERCASE
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