utf8_convert_case()

Complexity

Conditions	38
Paths	17978

Size

Total Lines	210
Code Lines	117

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
function utf8_convert_case($string, $case, $simple = false)
{
	global $sourcedir, $txt;

	$simple = !empty($simple);

	$lang = empty($txt['lang_locale']) ? '' : substr($txt['lang_locale'], 0, 2);

	// The main case conversion logic
	if (in_array($case, array('upper', 'lower', 'fold')))
	{
		$chars = preg_split('/(.)/su', $string, 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

		if ($chars === false)
			return false;

		switch ($case)
		{
			case 'upper':
				require_once($sourcedir . '/Unicode/CaseUpper.php');

				$substitutions = $simple ? utf8_strtoupper_simple_maps() : utf8_strtoupper_maps();

				// Turkish & Azeri conditional casing, part 1.
				if (in_array($lang, array('tr', 'az')))
					$substitutions['i'] = 'İ';

				break;

			case 'lower':
				require_once($sourcedir . '/Unicode/CaseLower.php');

				$substitutions = $simple ? utf8_strtolower_simple_maps() : utf8_strtolower_maps();

				// Turkish & Azeri conditional casing, part 1.
				if (in_array($lang, array('tr', 'az')))
				{
					$substitutions['İ'] = 'i';
					$substitutions['I' . "\xCC\x87"] = 'i';
					$substitutions['I'] = 'ı';
				}

				break;

			case 'fold':
				require_once($sourcedir . '/Unicode/CaseFold.php');

				$substitutions = $simple ? utf8_casefold_simple_maps() : utf8_casefold_maps();

				break;
		}

		foreach ($chars as &$char)
			$char = isset($substitutions[$char]) ? $substitutions[$char] : $char;

		$string = implode('', $chars);
	}
	elseif (in_array($case, array('title', 'ucfirst', 'ucwords')))
	{
		require_once($sourcedir . '/Unicode/RegularExpressions.php');
		require_once($sourcedir . '/Unicode/CaseUpper.php');
		require_once($sourcedir . '/Unicode/CaseTitle.php');

		$prop_classes = utf8_regex_properties();

		$upper = $simple ? utf8_strtoupper_simple_maps() : utf8_strtoupper_maps();

		// Turkish & Azeri conditional casing, part 1.
		if (in_array($lang, array('tr', 'az')))
			$upper['i'] = 'İ';

		$title = array_merge($upper, $simple ? utf8_titlecase_simple_maps() : utf8_titlecase_maps());

		switch ($case)
		{
			case 'title':
				$string = utf8_convert_case($string, 'lower', $simple);
				$regex = '/(?:^|[^\w' . $prop_classes['Case_Ignorable'] . '])\K(\p{L})/u';
				break;

			case 'ucwords':
				$regex = '/(?:^|[^\w' . $prop_classes['Case_Ignorable'] . '])\K(\p{L})(?=[' . $prop_classes['Case_Ignorable'] . ']*(?:(?<upper>\p{Lu})|\w?))/u';
				break;

			case 'ucfirst':
				$regex = '/^[^\w' . $prop_classes['Case_Ignorable'] . ']*\K(\p{L})(?=[' . $prop_classes['Case_Ignorable'] . ']*(?:(?<upper>\p{Lu})|\w?))/u';
				break;
		}

		$string = preg_replace_callback(
			$regex,

The variable $regex does not seem to be defined for all execution paths leading up to this point.

			function($matches) use ($upper, $title)
			{
				// If second letter is uppercase, use uppercase for first letter.
				// Otherwise, use titlecase for first letter.
				$case = !empty($matches['upper']) ? 'upper' : 'title';

				$matches[1] = isset($$case[$matches[1]]) ? $$case[$matches[1]] : $matches[1];

				return $matches[1];
			},
			$string
		);
	}

	// If casefolding, we're done.
	if ($case === 'fold')
		return $string;

	// Handle conditional casing situations...
	$substitutions = array();
	$replacements = array();

	// Greek conditional casing, part 1: Fix lowercase sigma.
	// Note that this rule doesn't depend on $txt['lang_locale'].
	if ($case !== 'upper' && strpos($string, 'ς') !== false || strpos($string, 'σ') !== false)

Consider adding parentheses for clarity. Current Interpretation: ($case !== 'upper' && strpos($string, 'ς') !== false) || strpos($string, 'σ') !== false, Probably Intended Meaning: $case !== 'upper' && (strpos($string, 'ς') !== false || strpos($string, 'σ') !== false)

	{
		require_once($sourcedir . '/Unicode/RegularExpressions.php');

		$prop_classes = utf8_regex_properties();

		// First, convert all lowercase sigmas to regular form.
		$substitutions['ς'] = 'σ';

		// Then convert any at the end of words to final form.
		$replacements['/\Bσ([' . $prop_classes['Case_Ignorable'] . ']*)(?!\p{L})/u'] = 'ς$1';
	}
	// Greek conditional casing, part 2: No accents on uppercase strings.
	if ($lang === 'el' && $case === 'upper')
	{
		// Composed forms.
		$substitutions += array(
			'Ά' => 'Α', 'Ἀ' => 'Α', 'Ἁ' => 'Α', 'Ὰ' => 'Α', 'Ᾰ' => 'Α',
			'Ᾱ' => 'Α', 'Α' => 'Α', 'Α' => 'Α', 'Ἂ' => 'Α', 'Ἃ' => 'Α',
			'Ἄ' => 'Α', 'Ἅ' => 'Α', 'Ἆ' => 'Α', 'Ἇ' => 'Α', 'Ὰ' => 'Α',
			'Ά' => 'Α', 'Α' => 'Α', 'Ἀ' => 'Α', 'Ἁ' => 'Α', 'Ἂ' => 'Α',
			'Ἃ' => 'Α', 'Ἄ' => 'Α', 'Ἅ' => 'Α', 'Ἆ' => 'Α', 'Ἇ' => 'Α',
			'Έ' => 'Ε', 'Ἐ' => 'Ε', 'Ἑ' => 'Ε', 'Ὲ' => 'Ε', 'Ἒ' => 'Ε',
			'Ἓ' => 'Ε', 'Ἔ' => 'Ε', 'Ἕ' => 'Ε', 'Ή' => 'Η', 'Ἠ' => 'Η',
			'Ἡ' => 'Η', 'Ὴ' => 'Η', 'Η' => 'Η', 'Η' => 'Η', 'Ἢ' => 'Η',
			'Ἣ' => 'Η', 'Ἤ' => 'Η', 'Ἥ' => 'Η', 'Ἦ' => 'Η', 'Ἧ' => 'Η',
			'Ἠ' => 'Η', 'Ἡ' => 'Η', 'Ὴ' => 'Η', 'Ή' => 'Η', 'Η' => 'Η',
			'Ἢ' => 'Η', 'Ἣ' => 'Η', 'Ἤ' => 'Η', 'Ἥ' => 'Η', 'Ἦ' => 'Η',
			'Ἧ' => 'Η', 'Ί' => 'Ι', 'Ἰ' => 'Ι', 'Ἱ' => 'Ι', 'Ὶ' => 'Ι',
			'Ῐ' => 'Ι', 'Ῑ' => 'Ι', 'Ι' => 'Ι', 'Ϊ' => 'Ι', 'Ι' => 'Ι',
			'Ἲ' => 'Ι', 'Ἳ' => 'Ι', 'Ἴ' => 'Ι', 'Ἵ' => 'Ι', 'Ἶ' => 'Ι',
			'Ἷ' => 'Ι', 'Ι' => 'Ι', 'Ι' => 'Ι', 'Ό' => 'Ο', 'Ὀ' => 'Ο',
			'Ὁ' => 'Ο', 'Ὸ' => 'Ο', 'Ὂ' => 'Ο', 'Ὃ' => 'Ο', 'Ὄ' => 'Ο',
			'Ὅ' => 'Ο', 'Ῥ' => 'Ρ', 'Ύ' => 'Υ', 'Υ' => 'Υ', 'Ὑ' => 'Υ',
			'Ὺ' => 'Υ', 'Ῠ' => 'Υ', 'Ῡ' => 'Υ', 'Υ' => 'Υ', 'Ϋ' => 'Υ',
			'Υ' => 'Υ', 'Υ' => 'Υ', 'Ὓ' => 'Υ', 'Υ' => 'Υ', 'Ὕ' => 'Υ',
			'Υ' => 'Υ', 'Ὗ' => 'Υ', 'Υ' => 'Υ', 'Υ' => 'Υ', 'Υ' => 'Υ',
			'Ώ' => 'Ω', 'Ὠ' => 'Ω', 'Ὡ' => 'Ω', 'Ὼ' => 'Ω', 'Ω' => 'Ω',
			'Ω' => 'Ω', 'Ὢ' => 'Ω', 'Ὣ' => 'Ω', 'Ὤ' => 'Ω', 'Ὥ' => 'Ω',
			'Ὦ' => 'Ω', 'Ὧ' => 'Ω', 'Ὠ' => 'Ω', 'Ὡ' => 'Ω', 'Ώ' => 'Ω',
			'Ω' => 'Ω', 'Ὢ' => 'Ω', 'Ὣ' => 'Ω', 'Ὤ' => 'Ω', 'Ὥ' => 'Ω',
			'Ὦ' => 'Ω', 'Ὧ' => 'Ω',
		);

		// Individual Greek diacritics.
		$substitutions += array(
			"\xCC\x80" => '', "\xCC\x81" => '', "\xCC\x84" => '',
			"\xCC\x86" => '', "\xCC\x88" => '', "\xCC\x93" => '',
			"\xCC\x94" => '', "\xCD\x82" => '', "\xCD\x83" => '',
			"\xCD\x84" => '', "\xCD\x85" => '', "\xCD\xBA" => '',
			"\xCE\x84" => '', "\xCE\x85" => '',
			"\xE1\xBE\xBD" => '', "\xE1\xBE\xBF" => '', "\xE1\xBF\x80" => '',
			"\xE1\xBF\x81" => '', "\xE1\xBF\x8D" => '', "\xE1\xBF\x8E" => '',
			"\xE1\xBF\x8F" => '', "\xE1\xBF\x9D" => '', "\xE1\xBF\x9E" => '',
			"\xE1\xBF\x9F" => '', "\xE1\xBF\xAD" => '', "\xE1\xBF\xAE" => '',
			"\xE1\xBF\xAF" => '', "\xE1\xBF\xBD" => '', "\xE1\xBF\xBE" => '',
		);
	}

	// Turkish & Azeri conditional casing, part 2.
	if ($case !== 'upper' && in_array($lang, array('tr', 'az')))
	{
		// Remove unnecessary "COMBINING DOT ABOVE" after i
		$substitutions['i' . "\xCC\x87"] = 'i';
	}

	// Lithuanian conditional casing.
	if ($lang === 'lt')
	{
		// Force a dot above lowercase i and j with accents by inserting
		// the "COMBINING DOT ABOVE" character.
		// Note: some fonts handle this incorrectly and show two dots,
		// but that's a bug in those fonts and cannot be fixed here.
		if ($case !== 'upper')
			$replacements['/(i\x{328}?|\x{12F}|j)([\x{300}\x{301}\x{303}])/u'] = '$1' . "\xCC\x87" . '$2';

		// Remove "COMBINING DOT ABOVE" after uppercase I and J.
		if ($case !== 'lower')
			$replacements['/(I\x{328}?|\x{12E}|J)\x{307}/u'] = '$1';
	}

	// Dutch has a special titlecase rule.
	if ($lang === 'nl' && $case === 'title')
	{
		$replacements['/\bIj/u'] = 'IJ';
	}

	// Now perform whatever conditional casing fixes we need.
	if (!empty($substitutions))
		$string = strtr($string, $substitutions);

	if (!empty($replacements))
		$string = preg_replace(array_keys($replacements), $replacements, $string);

	return $string;
}
?>