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IntlChar::isIDIgnorable

(PHP 7, PHP 8)

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

Description

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).

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 poins

<?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)

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