* @return
*/
function substr_mb($str, $start, $len)
{
$mb_len = mb_detect_encoding($str) == 'UTF-8' ? 2 : 1;
$patt = '/([\\x00-\\x7f]|[\\x80-\\xff].{' . $mb_len . '}){' . $len . '}/';
preg_match($patt, $str, $groups);
if ($groups) {
return $groups[0];
} else {
return false;
}
}
echo '<meta charset=utf-8>';
$str = '北京dd欢迎你';
for ($i = 0; $i <= strlen_mb($str); $i++) {
var_dump(substr_mb($str, 0, $i));
}
function cutHighlightContent($content, $len = 20)
{
$content = '我的<em>php</em>你的阿萨德飞萨芬士大夫士大夫<em>php</em>它的';
$content = preg_replace('/.*?(<em>.*?<\\/em>).*/', '$1...', $content);
return $content;
}
// $content = '<em>php</em>';
// echo cutHighlightContent($content);
// phpinfo();
/* $today = date('Y-m-d');
$now = time($today);
// echo $today.'-'.$now;
function dtUTC($dtval)
{
if ($dtval == '0000-00-00 00:00:00') {
// zero
return $dtval;
} elseif (strlen_mb($dtval) == 10) {
// date only
return $dtval;
} elseif ($dtval == '') {
// null
return $dtval;
} else {
// full date & time
$stamp = strtotime($dtval);
$mzone = date_default_timezone_get();
date_default_timezone_set('UTC');
$rval = date('Y-m-d H:i:s', $stamp);
date_default_timezone_set($mzone);
return $rval;
}
}
