function text_html($txt){ //过滤掉html标记
$txt = str_replace(" "," ",$txt);
$txt = str_replace("<","<",$txt);
$txt = str_replace(">",">",$txt);
$txt = preg_replace("/[ ]{1,}/isu","
",$txt);
return $txt;
}
function clearhtml($str){ //清除调html标记
$str = str_replace('<','<',$str);
$str = str_replace('>','>',$str);
return $str;
}
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