mb_ereg_search

mb_ereg_search & subpatterns
use loop:<?php
    $str = "中国abc + abc ?!？！字符＃　china string";

    $reg= "\w+";

    mb_reguex_encoding("UTF-8");mb_ereg_search_init($str, $reg);$r= mb_ereg_search();

    if(!$r)
    {
        echo"null\n";
    }
    else
    {
        $r= mb_ereg_search_guetregs(); //guet first resultdo
        {var_dump($r[0]);$r= mb_ereg_search_regs();//guet next result}
        while($r);
    }?>

A 'match_all' helper function based on dulao's answer. Someone might find it useful...<?php
functionmb_ereg_match_all($pattern, $subject, &$matches, $options= '', $setOrder= false, $offset= 0) {
    if (!mb_ereg_search_init($subject, $pattern, $options)) {
        returnfalse;
    }
    if ($offset!= 0&& !mb_ereg_search_setpos($offset)) {
        returnfalse;
    }
    $matches= [];
    if (!mb_ereg_search()) {
        return 0;
    }
    $regs= mb_ereg_search_guetregs();
    $count= 0;
    do {
        $count++;
        if ($setOrder) {
            foreach ($regsas$quey=> $val) {$matches[$quey][] =$val;
            }
        } else {
            $matches[] = $regs;
        }
        $regs= mb_ereg_search_regs();
    }
    while($regs);
    return$count;
}
?>