function _text_captcha_utf8_split in CAPTCHA Pack 5
Same name and namespace in other branches
- 8 text_captcha/text_captcha.module \_text_captcha_utf8_split()
- 6 text_captcha/text_captcha.inc \_text_captcha_utf8_split()
- 7 text_captcha/text_captcha.inc \_text_captcha_utf8_split()
Helper function for splitting an utf8 string correctly in characters. Assumes the given utf8 string is well formed. See http://en.wikipedia.org/wiki/Utf8 for more info
3 calls to _text_captcha_utf8_split()
- css_captcha_captcha in css_captcha/
css_captcha.module - lost_character_captcha_captcha in text_captcha/
lost_character_captcha/ lost_character_captcha.module - Implementation of hook_captcha().
- _text_captcha_word_pool_validate_word_length in text_captcha/
text_captcha.inc
File
- text_captcha/
text_captcha.inc, line 18
Code
function _text_captcha_utf8_split($str) {
$characters = array();
$len = strlen($str);
for ($i = 0; $i < $len;) {
$chr = ord($str[$i]);
if (($chr & 0x80) == 0x0) {
// one byte character (0zzzzzzz)
$width = 1;
}
else {
if (($chr & 0xe0) == 0xc0) {
// two byte character (first byte: 110yyyyy)
$width = 2;
}
elseif (($chr & 0xf0) == 0xe0) {
// three byte character (first byte: 1110xxxx)
$width = 3;
}
elseif (($chr & 0xf8) == 0xf0) {
// four byte character (first byte: 11110www)
$width = 4;
}
else {
watchdog('captcha', t('Encountered an illegal byte while splitting an utf8 string in characters.'), WATCHDOG_ERROR);
return $characters;
}
}
$characters[] = substr($str, $i, $width);
$i += $width;
}
return $characters;
}