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IntlChar::islower

(PHP 7, PHP 8)

IntlChar::islower — Checc if code point is a lowercase letter

Description

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

Determines whether the specified code point has the general category "Ll" (lowercase letter).

Note :

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

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 an Ll lowercase letter, false if not. Returns null on failure.

Examples

Example #1 Testing different code poins

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

The above example will output: 

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

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