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Homephp教程php手册检索结果高亮显示关键词的函数

高亮显示|函数|显示|高亮

如:要检索abc,结果显示akjdfdkcdb,如何才能让其中的abc显示为红色。

函数如下:

function highLight($str, $keywords, $color = "red") {
    if (empty($keywords)) {
        return $str;
    }
    $keywords = split("[ \t\r\n,]+", $keywords);
    $str_begin = "##~~##~";
    $str_end   = "~##~~##";
    foreach($keywords as $val) {
        $tvar = preg_quote($val);
        $tvar = str_replace('/', '\/', $tvar);
        $patterns[]    = "/(" . $tvar . ")/";
        $replacement[] = $str_begin . urlencode($val) . $str_end;
        $tvar = preg_quote(urlencode($val));
        $tvar = str_replace('/', '\/', $tvar);
        $tmppattern[]  = "/(" . $str_begin . $tvar . $str_end . ")/";
        $finalrep[]    = "" . $val . "";
    }
    $str = preg_replace($patterns, $replacement, $str);
    $str = preg_replace($tmppattern, $finalrep, $str);
    return $str;
}



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