mb_check_encoding(3) [php man page]

MB_CHECK_ENCODING(3)							 1						      MB_CHECK_ENCODING(3)

mb_check_encoding - Check if the string is valid for the specified encoding

SYNOPSIS

       bool mb_check_encoding NULL ([string  $var], [string  $encoding = mb_internal_encoding()])

DESCRIPTION

	Checks if the specified byte stream is valid for the specified encoding. It is useful to prevent so-called "Invalid Encoding Attack".

PARAMETERS

	      o $var
		- The byte stream to check. If it is omitted, this function checks all the input from the beginning of the request.

	      o $encoding
		- The expected encoding.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

PHP Documentation Group 												      MB_CHECK_ENCODING(3)

MB_STRRPOS(3)								 1							     MB_STRRPOS(3)

mb_strrpos - Find position of last occurrence of a string in a string

SYNOPSIS

       int mb_strrpos (string  $haystack, string  $needle, [int  $offset], [string  $encoding = mb_internal_encoding()])

DESCRIPTION

	Performs  a  multibyte	safe  strrpos(3)  operation  based  on the number of characters. $needle position is counted from the beginning of
       $haystack. First character's position is 0. Second character position is 1.

PARAMETERS

	      o $haystack
		- The string being checked, for the last occurrence of $needle

	      o $needle
		- The string to find in $haystack.

	      o $offset
		- May be specified to begin searching an arbitrary number of characters into the string. Negative values will stop searching at an
		arbitrary point prior to the end of the string.

	      o $encoding
		-The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.

RETURN VALUES

	Returns the numeric position of the last occurrence of $needle in the $haystack string. If $needle is not found, it returns FALSE.

CHANGELOG

       +--------+---------------------------------------+
       |Version |					|
       |	|					|
       |	|	       Description		|
       |	|					|
       +--------+---------------------------------------+
       | 5.2.0	|					|
       |	|					|
       |	| Added the optional parameter $offset. |
       |	|					|
       +--------+---------------------------------------+
NOTES

       Note

	       The  $encoding parameter was moved from the third position to the fourth in PHP 5.2.0. For backward compatibility, $encoding can be
	      specified as the third parameter, but doing so is deprecated and will be removed in the future.

SEE ALSO

       mb_strpos(3), mb_internal_encoding(3), strrpos(3).

PHP Documentation Group 													     MB_STRRPOS(3)