(PHP 7, PHP 8)
IntlChar::isIDIgnorable — Check if code point is an ignorable character
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).
示例 #1 Testing different code points
<?php
var_dump(IntlChar::isIDIgnorable("A"));
var_dump(IntlChar::isIDIgnorable(" "));
var_dump(IntlChar::isIDIgnorable("\u{007F}"));
?>
以上示例会输出:
bool(false) bool(false) bool(true)
IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT