略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: IntlChar::getNumericValue

2024-11-12

IntlChar::getNumericValue

(PHP 7, PHP 8)

IntlChar::getNumericValueGet the numeric value for a Unicode code point

说明

public static IntlChar::getNumericValue(int|string $codepoint): ?float

Gets the numeric value for a Unicode code point as defined in the Unicode Character Database.

For characters without any numeric values in the Unicode Character Database, this function will return IntlChar::NO_NUMERIC_VALUE.

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

Numeric value of codepoint, or IntlChar::NO_NUMERIC_VALUE if none is defined. This constant was added in PHP 7.0.6, prior to this version the literal value (float)-123456789 may be used instead. Returns null on failure.

范例

示例 #1 Testing different code points

<?php
var_dump
(IntlChar::getNumericValue("4"));
var_dump(IntlChar::getNumericValue("x"));
var_dump(IntlChar::getNumericValue("\u{216C}"));
?>

以上例程会输出:

float(4)
float(-123456789)
float(50)
add a noteadd a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址:https://www.php.net/manual/en/intlchar.getnumericvalue.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3