IntlChar::isWhitespace()

版本：php7

(PHP 7)

Check if code point is a whitespace character according to ICU

说明

publicstaticIntlChar::isWhitespace(mixed $codepoint): bool

Determines if the specified code point is a whitespace character according to ICU.

A character is considered to be a ICU whitespace character if and only if it satisfies one of the following criteria:

• It is a Unicode Separator character(categories "Z"= "Zs" or "Zl" or "Zp"), but is not also a non-breaking space(U+00A0 NBSP or U+2007 Figure Space or U+202F Narrow NBSP).
• It is U+0009 HORIZONTAL TABULATION.
• It is U+000A LINE FEED.
• It is U+000B VERTICAL TABULATION.
• It is U+000C FORM FEED.
• It is U+000D CARRIAGE RETURN.
• It is U+001C FILE SEPARATOR.
• It is U+001D GROUP SEPARATOR.
• It is U+001E RECORD SEPARATOR.
• It is U+001F UNIT SEPARATOR.

参数

$codepoint

The integer codepoint value(e.g.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")

返回值

Returns TRUE if$codepointis a whitespace character according to ICU,FALSE if not.

范例

Testing different code points

<?php
var_dump(IntlChar::iswhitespace("A"));
var_dump(IntlChar::iswhitespace(" "));
var_dump(IntlChar::iswhitespace("\n"));
var_dump(IntlChar::iswhitespace("\t"));
var_dump(IntlChar::iswhitespace("\u{00A0}"));
?>

以上例程会输出：

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

参见

• IntlChar::isspace() Check if code point is a space character
• IntlChar::isJavaSpaceChar() Check if code point is a space character according to Java
• IntlChar::isUWhiteSpace() Check if code point has the White_Space Unicode property