03-18-2019
Does not surprise me...
iconv purpose is not to remove char when not in a supposed charset, but to convert one charset to another...
How can you assume non ascii char in UTF8 like you are doing?
And if UTF8, yes converted to ASCII record length will will not be the same ASCII is sure shorter...
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LEARN ABOUT PHP
iconv_strrpos
ICONV_STRRPOS(3) 1 ICONV_STRRPOS(3)
iconv_strrpos - Finds the last occurrence of a needle within a haystack
SYNOPSIS
int iconv_strrpos (string $haystack, string $needle, [string $charset = ini_get("iconv.internal_encoding")])
DESCRIPTION
Finds the last occurrence of a $needle within a $haystack.
In contrast to strrpos(3), the return value of iconv_strrpos(3) is the number of characters that appear before the needle, rather than the
offset in bytes to the position where the needle has been found. The characters are counted on the basis of the specified character set
$charset.
PARAMETERS
o $haystack
- The entire string.
o $needle
- The searched substring.
o $charset
- If $charset parameter is omitted, $string are assumed to be encoded in iconv.internal_encoding.
If $haystack or $needle is not a string, it is converted to a string and applied as the ordinal value of a character.
RETURN VALUES
Returns the numeric position of the last occurrence of $needle in $haystack.
If $needle is not found, iconv_strrpos(3) will return FALSE.
Warning
This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on
Booleans for more information. Use the === operator for testing the return value of this function.
SEE ALSO
strrpos(3), iconv_strpos(3), mb_strrpos(3).
PHP Documentation Group ICONV_STRRPOS(3)