115  * @param string $needle The string to find in $haystack.
120 	public static function stripos($haystack, $needle, $offset = 0) {  argument
123 			$needle = Multibyte::strtoupper($needle);
124 			return Multibyte::strpos($haystack, $needle, $offset);
126 		return stripos($haystack, $needle, $offset);
133  * @param string $needle The string to find in $haystack.
140 	public static function stristr($haystack, $needle, $part = false) {  argument
151 			$needle = Multibyte::strtoupper($needle);
152 			$needle = Multibyte::utf8($needle);
153 			$needleCount = count($needle);
159 				if (isset($needle[0]) && $needle[0] === $check[$position]) {
161 						if ($needle[$i] !== $check[$position + $i]) {
185 			return stristr($haystack, $needle, $part);
187 		return stristr($haystack, $needle);
208  * @param string $needle The position counted from the beginning of haystack.
213 	public static function strpos($haystack, $needle, $offset = 0) {  argument
220 			$needle = Multibyte::utf8($needle);
221 			$needleCount = count($needle);
226 				if (isset($needle[0]) && $needle[0] === $haystack[$position]) {
228 						if ($needle[$i] !== $haystack[$position + $i]) {
244 		return strpos($haystack, $needle, $offset);
251  * @param string $needle The string to find in $haystack.
258 	public static function strrchr($haystack, $needle, $part = false) {  argument
267 		$needle = Multibyte::utf8($needle);
268 		$needleCount = count($needle);
274 			if (isset($needle[0]) && $needle[0] === $check[$position]) {
276 					if ($needle[$i] !== $check[$position + $i]) {
277 						if ($needle[$i] === $check[($position + $i) - 1]) {
285 				if (isset($matches[$needle[0]]) && $matches[$needle[0]] > 1) {
286 					$matches[$needle[0]] = $matches[$needle[0]] - 1;
311  * @param string $needle The string to find in $haystack.
318 	public static function strrichr($haystack, $needle, $part = false) {  argument
328 		$needle = Multibyte::strtoupper($needle);
329 		$needle = Multibyte::utf8($needle);
330 		$needleCount = count($needle);
336 			if (isset($needle[0]) && $needle[0] === $check[$position]) {
338 					if ($needle[$i] !== $check[$position + $i]) {
339 						if ($needle[$i] === $check[($position + $i) - 1]) {
347 				if (isset($matches[$needle[0]]) && $matches[$needle[0]] > 1) {
348 					$matches[$needle[0]] = $matches[$needle[0]] - 1;
373  * @param string $needle The string to find in $haystack.
378 	public static function strripos($haystack, $needle, $offset = 0) {  argument
387 			$needle = Multibyte::strtoupper($needle);
388 			$needle = Multibyte::utf8($needle);
389 			$needleCount = count($needle);
394 				if (isset($needle[0]) && $needle[0] === $haystack[$position]) {
396 						if ($needle[$i] !== $haystack[$position + $i]) {
397 							if ($needle[$i] === $haystack[($position + $i) - 1]) {
405 					if (!$offset && isset($matches[$needle[0]]) && $matches[$needle[0]] > 1) {
406 						$matches[$needle[0]] = $matches[$needle[0]] - 1;
416 		return strripos($haystack, $needle, $offset);
423  * @param string $needle The string to find in $haystack.
429 	public static function strrpos($haystack, $needle, $offset = 0) {  argument
438 			$needle = Multibyte::utf8($needle);
439 			$needleCount = count($needle);
444 				if (isset($needle[0]) && $needle[0] === $haystack[$position]) {
446 						if ($needle[$i] !== $haystack[$position + $i]) {
447 							if ($needle[$i] === $haystack[($position + $i) - 1]) {
455 					if (!$offset && isset($matches[$needle[0]]) && $matches[$needle[0]] > 1) {
456 						$matches[$needle[0]] = $matches[$needle[0]] - 1;
466 		return strrpos($haystack, $needle, $offset);
473  * @param string $needle The string to find in $haystack
480 	public static function strstr($haystack, $needle, $part = false) {  argument
490 			$needle = Multibyte::utf8($needle);
491 			$needleCount = count($needle);
497 				if (isset($needle[0]) && $needle[0] === $check[$position]) {
499 						if ($needle[$i] !== $check[$position + $i]) {
523 			return strstr($haystack, $needle, $part);
525 		return strstr($haystack, $needle);
664  * @param string $needle The string being found.
667 	public static function substrCount($haystack, $needle) {  argument
672 		$needle = Multibyte::utf8($needle);
673 		$needleCount = count($needle);
675 		if ($needleCount === 1 && isset($matches[$needle[0]])) {
676 			return $matches[$needle[0]];
680 			if (isset($needle[0]) && $needle[0] === $haystack[$i]) {
682 					if ($needle[$ii] === $haystack[$i + 1]) {
683 …				if ((isset($needle[$ii + 1]) && $haystack[$i + 2]) && $needle[$ii + 1] !== $haystack[$i + 2]) {