# IntlChar::isULowercase

(PHP 7, PHP 8)

IntlChar::isULowercase — Check if code point has the Lowercase Unicode property

### 说明

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

Check if a code point has the Lowercase Unicode property.

This is the same as `IntlChar::hasBinaryProperty($codepoint, IntlChar::PROPERTY_LOWERCASE)`

> 注意:

> This is different than IntlChar::islower() and will return `true` for more characters.

### 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` has the Lowercase Unicode property, `false` if not. Returns `null` on failure.

### 示例

示例 #1 Testing different code points

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

以上示例会输出：

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

### 参见

- IntlChar::islower() - Check if code point is a lowercase letter
- IntlChar::hasBinaryProperty() - Check a binary Unicode property for a code point
- `IntlChar::PROPERTY_LOWERCASE`

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