IntlChar::isIDIgnorable()

版本：php7

(PHP 7)

Check if code point is an ignorable character

说明

publicstaticIntlChar::isIDIgnorable(mixed $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).

Note:

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

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 ignorable in identifiers,FALSE if not.

范例

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