IntlChar::istitle

(PHP 7, PHP 8)

IntlChar::istitle — Check if code point is a titlecase letter

说明

public static IntlChar::istitle(int|string $codepoint): ?bool

Determines whether the specified code point is a titlecase letter.

true for general category "Lt" (titlecase letter).

参数

codepoint: The int 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 a titlecase letter, false if not. Returns null on failure.

示例

示例 #1 Testing different code points

<?php
// Latin Capital Letter Dz with Caron U+01C4
var_dump(IntlChar::istitle("Ǆ"));
// Latin Capital Letter D with Small Letter Z with Caron U+01C5
var_dump(IntlChar::istitle("ǅ"));
// Latin Small Letter Dz with Caron U+01C6
var_dump(IntlChar::istitle("ǆ"));

// Greek Capital Letter Alpha with Prosgegrammeni U+1FBC
var_dump(IntlChar::istitle("ᾼ"));
// Greek Small Letter Alpha with Ypogegrammeni U+1FB3
var_dump(IntlChar::istitle("ᾳ"));
// Greek Capital Letter Alpha U+0391
var_dump(IntlChar::istitle("Α"));
?>

以上示例会输出：

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

参见

IntlChar::isupper() - Check if code point has the general category "Lu" (uppercase letter)
IntlChar::islower() - Check if code point is a lowercase letter
IntlChar::totitle() - Make Unicode character titlecase

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IntlChar::istitle

说明

参数

返回值

示例

参见

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