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Digg iconv_strlen
Returns the character count of string
(PHP 5)
In contrast to strlen(), iconv_strlen() counts the occurrences of characters in the given byte sequence str on the basis of the specified character set, the result of which is not necessarily identical to the length of the string in byte. Parameters
See Also
Code Examples / Notes » iconv_strlenhfuecks @ nospam org
If iconv_strlen is passed a UTF-8 string containing badly formed sequences, it will return FALSE. This is in contrast to mb_strlen of the behaviour of utf8_decode, which strip out any bad sequences; <?php # UTF-8 string containing bad sequence: \xe9 $str = "Iñtërnâtiôn\xe9àlizætiøn"; print "mb_strlen: ".mb_strlen($str,'UTF-8')."\n"; print "strlen/utf8_decode: ".strlen(utf8_decode($str))."\n"; print "iconv_strlen: ".iconv_strlen($str,'UTF-8')."\n"; ?> Displays; mb_strlen: 20 strlen/utf8_decode: 20 iconv_strlen: (PHP 5.0.5) As such it is being "stricter" than mb_strlen and it may mean you need to check for invalid sequences first. A quick way to check is to exploit the behaviour of the PCRE extension (see notes on pattern modifiers); <?php if (preg_match('/^.{1}/us',$str,$ar) != 1) { die("string contains invalid UTF-8"); } ?> A slower but stricter check (regex) can be found at: http://www.w3.org/International/questions/qa-forms-utf-8 Similiar applies to iconv_substr, iconv_strpos and iconv_strrpos |
