Gets the Decomposition_Mapping property for the given UTF-8 encoded code point

# Normalizer::getRawDecomposition

# normalizer_get_raw_decomposition

(PHP 7 >= 7.3, PHP 8)

Normalizer::getRawDecomposition -- normalizer_get_raw_decomposition — Gets the Decomposition_Mapping property for the given UTF-8 encoded code point

### Description

Object-oriented style

public static function Normalizer::getRawDecomposition(string `$string`, int `$form` = `Normalizer::FORM_C`): ?string

Procedural style

function normalizer_get_raw_decomposition(string `$string`, int `$form` = `Normalizer::FORM_C`): ?string

Gets the Decomposition_Mapping property, as specified in the Unicode Character Database (UCD), for the given UTF-8 encoded code point.

### Parameters

`string`

  The input string, which should be a single, UTF-8 encoded, code point.

### Return Values

Returns a string containing the Decomposition_Mapping property, if present in the UCD.

Returns `null` if there is no Decomposition_Mapping property for the character.

### Examples

Example #1 Normalizer::getRawDecomposition() example

    <?php

    $result = "";
    $strings = [
        "a",
        "\u{FFDA}",
        "\u{FDFA}",
        "",
        "aa",
        "\xF5",
    ];

    foreach ($strings as $string) {
        $decomposition = Normalizer::getRawDecomposition($string);
        // $decomposition = normalizer_get_raw_decomposition($string); Procedural way

        $error_code = intl_get_error_code();
        $error_message = intl_get_error_message();

        $string_hex = bin2hex($string);
        $result .= "---------------------\n";

        if ($decomposition === null) {
            $result .= "'$string_hex' has no decomposition mapping\n" ;
        } else {
            $result .= "'$string_hex' has the decomposition mapping '" . bin2hex($decomposition) . "'\n" ;
        }

        $result .= "error info: '$error_message' ($error_code)\n";
    }

    echo $result;
    ?>

The above example will output:

    ---------------------
    '61' has no decomposition mapping
    error info: 'U_ZERO_ERROR' (0)
    ---------------------
    'efbf9a' has the decomposition mapping 'e385a1'
    error info: 'U_ZERO_ERROR' (0)
    ---------------------
    'efb7ba' has the decomposition mapping 'd8b5d984d98920d8a7d984d984d98720d8b9d984d98ad98720d988d8b3d984d985'
    error info: 'U_ZERO_ERROR' (0)
    ---------------------
    '' has no decomposition mapping
    error info: 'Input string must be exactly one UTF-8 encoded code point long.: U_ILLEGAL_ARGUMENT_ERROR' (1)
    ---------------------
    '6161' has no decomposition mapping
    error info: 'Input string must be exactly one UTF-8 encoded code point long.: U_ILLEGAL_ARGUMENT_ERROR' (1)
    ---------------------
    'f5' has no decomposition mapping
    error info: 'Code point out of range: U_ILLEGAL_ARGUMENT_ERROR' (1)

### See Also

- Normalizer::normalize() - Normalizes the input provided and returns the normalized string
- Normalizer::isNormalized() - Checks if the provided string is already in the specified normalization form

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