/**
* UTF-8 aware replacement for trim().
*
* Strip whitespace (or other characters) from the beginning and end of
* a string.
*
* @param string $str The UTF-8 encoded string
* @param mixed $stripchars The stripped characters
* @param int $striptype The optional argument $striptype can be
* UTF8_STRIP_BOTH, UTF8_STRIP_LEFT, or UTF8_STRIP_RIGHT.
* If $striptype is not specified it is assumed to be
* UTF8_STRIP_BOTH.
* @return string The stripped string
*/
function utf8_strip($str, $stripchars = null, $striptype = UTF8_STRIP_BOTH)
{
static $defaults;
global $unicode_separators_array;
if ($stripchars === null) {
if ($defaults === null) {
foreach ($unicode_separators_array as $cp) {
$defaults[] = utf8_chr($cp);
}
}
$stripchars = $defaults;
} elseif (is_array($stripchars)) {
$chars = array();
foreach ($stripchars as $char) {
if (($char = utf8_get_char($char)) !== false) {
$chars[] = $char;
}
}
$stripchars = $chars;
} else {
$stripchars = utf8_split($stripchars, 1);
}
$left = $striptype & UTF8_STRIP_LEFT;
$right = $striptype & UTF8_STRIP_RIGHT;
$rv = $buffer = '';
while ($char = utf8_get_char($str, $i)) {
$state = in_array($char, $stripchars);
if ($left) {
if ($state) {
continue;
} else {
$left = false;
}
}
if ($right) {
if ($state) {
$buffer .= $char;
continue;
} else {
$rv .= $buffer;
$buffer = '';
}
}
$rv .= $char;
}
return $rv;
}
/**
* @dataProvider providerFailingUtf8Split
*/
public function testFailingUtf8SplitReturnValue($str, $chunklen)
{
$this->assertFalse(@utf8_split($str, $chunklen));
}
/**
* utf8_rtrim( )
*
* Strip whitespace or other characters from end of a UTF-8 string
* @since 1.3
*
* @param string $string The string to be trimmed
* @param string $chrs Optional characters to be stripped
* @return string The string with unwanted characters stripped from the right
*/
function utf8_rtrim($string = '', $chrs = '')
{
utf8_trim_util($string, $chrs);
$s_look = utf8_split($string);
$len = count($s_look);
while ($len && isset($chrs[$s_look[$len - 1]])) {
--$len;
}
return utf8_substr($string, 0, $len);
}