discuz字符串截取函数messagecutstr()详解

messagecutstr($str, $length, $dot)

<div>$str = 'DZ起点网就是好，学习Dsicuz少不了！';</div><div>$length = 8;</div><div>$dot = '+更多Discuz教程请百度搜索“DZ起点网”！';</div><div></div><div>echo messagecutstr($str, $length, $dot);</div>

include_once libfile('function/post');

function messagecutstr($str, $length = 0, $dot = ' ...') {        global $_G;        $str = messagesafeclear($str);        $sppos = strpos($str, chr(0).chr(0).chr(0));        if($sppos !== false) {                $str = substr($str, 0, $sppos);        }        $language = lang('forum/misc');        loadcache(array('bbcodes_display', 'bbcodes', 'smileycodes', 'smilies', 'smileytypes', 'domainwhitelist'));        $bbcodes = 'b|i|u|p|color|size|font|align|list|indent|float';        $bbcodesclear = 'email|code|free|table|tr|td|img|swf|flash|attach|media|audio|groupid|payto'.($_G['cache']['bbcodes_display'][$_G['groupid']] ? '|'.implode('|', array_keys($_G['cache']['bbcodes_display'][$_G['groupid']])) : '');        $str = strip_tags(preg_replace(array(                        "//[hide=?/d*/](.*?)/[//hide/]/is",                        "//[quote](.*?)/[//quote]/si",                        $language['post_edit_regexp'],                        "//[url=?.*?/](.+?)/[//url/]/si",                        "//[($bbcodesclear)=?.*?/].+?/[////1/]/si",                        "//[($bbcodes)=?.*?/]/i",                        "//[//($bbcodes)/]/i",                ), array(                        "[b]$language[post_hidden][/b]",                        '',                        '',                        '//1',                        '',                        '',                        '',                ), $str));        if($length) {                $str = cutstr($str, $length, $dot);        }        $str = preg_replace($_G['cache']['smilies']['searcharray'], '', $str);        if($_G['setting']['plugins']['func'][HOOKTYPE]['discuzcode']) {                $_G['discuzcodemessage'] = & $str;                $param = func_get_args();                hookscript('discuzcode', 'global', 'funcs', array('param' => $param, 'caller' => 'messagecutstr'), 'discuzcode');        }        return trim($str);}复制代码