IntlChar::isIDIgnorable

(PHP 7, PHP 8)

IntlChar::isIDIgnorable — Check if code point is an ignorable character

说明

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

Determines if the specified character should be regarded as an ignorable character in an identifier.

true for characters with general category "Cf" (format controls) as well as non-whitespace ISO controls (U+0000..U+0008, U+000E..U+001B, U+007F..U+009F).

注意:
Note that Unicode just recommends to ignore Cf (format controls).

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 ignorable in identifiers, false if not. Returns null on failure.

范例

示例 #1 Testing different code points


<?php
var_dump(IntlChar::isIDIgnorable("A"));
var_dump(IntlChar::isIDIgnorable(" "));
var_dump(IntlChar::isIDIgnorable("\u{007F}"));
?>

以上例程会输出：

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

参见

IntlChar::isIDStart() - Check if code point is permissible as the first character in an identifier
IntlChar::isIDPart() - Check if code point is permissible in an identifier
IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT

add 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.isidignorable.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP mkdir()写出来的权限与mode值不符合 Packagist / Composer 中国全量镜像利用php soap实现web service PHP获取指定函数定义在哪个文件中及行号支持php7的性能采集扩展

略微加速

PHP官方手册 - 互联网笔记

IntlChar::isIDIgnorable

说明

参数

返回值

范例

参见

User Contributed Notes