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

Procedural style

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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