Check if code point is a whitespace character according to ICU

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- PHP Manual
- IntlChar
- Check if code point is a whitespace character according to ICU

# IntlChar::isWhitespace

(PHP 7, PHP 8)

IntlChar::isWhitespace — Check if code point is a whitespace character according to ICU

### Description

public static IntlChar::isWhitespace(int|string `$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.

### 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 a whitespace character according to ICU, `false` if not. Returns `null` on failure.

### Examples

Example #1 Testing different code points

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

The above example will output:

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

### See Also

- 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