IntlChar::istitle

(PHP 7, PHP 8)

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

Description

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).

Parameters

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}")

Return Values

Returns true if codepoint is a titlecase letter, false if not. Returns null on failure.

Examples

Example #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"));
?>

The above example will output:

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

See Also