IntlChar
PHP Manual

IntlChar::isIDIgnorable

Check if code point is an ignorable character

Description

public static boolnull IntlChar::isIDIgnorable(intstring $codepoint)

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).

Parameters

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}")

Return Values

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

Examples

Example #1 Testing different code points

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

The above example will output:

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

See Also

  • IntlChar::isIDStart
  • IntlChar::isIDPart
  • IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT