satooshi/VietnameseUnicodeNormalizationFormCAndD.php

## VietnameseUnicodeNormalizationFormCAndD.php
<?php

# http://www.unicode.org/charts/PDF/U1E00.pdf
$targets = [
  'aắằặấầẩậẳẵạàáâãảăẫ',
  'eẽẹếềểễệèéêẻ',
  'oốồổỗộờởơớỡòóôõỏọợ',
  'iịìíĩỉ',
  'uứừửưữựụùúũủ',
  'yỳỷỹỵý'
];

# http://php.net/manual/en/class.normalizer.php
foreach ($targets as $target) {
  $str1 = Normalizer::normalize($target, Normalizer::FORM_D);
  var_dump($str1);

  $str2 = Normalizer::normalize($target, Normalizer::FORM_C);
  var_dump($str2);
}
/*
string(72) "aắằặấầẩậẳẵạàáâãảăẫ"
string(47) "aắằặấầẩậẳẵạàáâãảăẫ"
string(44) "eẽẹếềểễệèéêẻ"
string(31) "eẽẹếềểễệèéêẻ"
string(72) "oốồổỗộờởơớỡòóôõỏọợ"
string(47) "oốồổỗộờởơớỡòóôõỏọợ"
string(16) "iịìíĩỉ"
string(13) "iịìíĩỉ"
string(44) "uứừửưữựụùúũủ"
string(30) "uứừửưữựụùúũủ"
string(16) "yỳỷỹỵý"
string(15) "yỳỷỹỵý"
*/
	<?php

	# http://www.unicode.org/charts/PDF/U1E00.pdf
	$targets = [
	'aắằặấầẩậẳẵạàáâãảăẫ',
	'eẽẹếềểễệèéêẻ',
	'oốồổỗộờởơớỡòóôõỏọợ',
	'iịìíĩỉ',
	'uứừửưữựụùúũủ',
	'yỳỷỹỵý'
	];

	# http://php.net/manual/en/class.normalizer.php
	foreach ($targets as $target) {
	$str1 = Normalizer::normalize($target, Normalizer::FORM_D);
	var_dump($str1);

	$str2 = Normalizer::normalize($target, Normalizer::FORM_C);
	var_dump($str2);
	}
	/*
	string(72) "aắằặấầẩậẳẵạàáâãảăẫ"
	string(47) "aắằặấầẩậẳẵạàáâãảăẫ"
	string(44) "eẽẹếềểễệèéêẻ"
	string(31) "eẽẹếềểễệèéêẻ"
	string(72) "oốồổỗộờởơớỡòóôõỏọợ"
	string(47) "oốồổỗộờởơớỡòóôõỏọợ"
	string(16) "iịìíĩỉ"
	string(13) "iịìíĩỉ"
	string(44) "uứừửưữựụùúũủ"
	string(30) "uứừửưữựụùúũủ"
	string(16) "yỳỷỹỵý"
	string(15) "yỳỷỹỵý"
	*/