<?
class useful{
function formatnumber(num){
return number_format(num, 2, ".", ",");
function formatstring(string = ""){
string = preg_replace(array("/ /", "/ /"),
array(" ",
" "), string);
return nl2br(string);
function formatcontent(text){
trans = get_html_translation_table(HTML_SPECIALCHARS);
trans = array_flip(trans);
text = strtr(text, trans);
//text = str_replace("\n", "<br>",
text);
//text = str_replace(" ", " ", text);
return text;
function bitsize(num){
if(!preg_match("/^[0-9]+/", num)) return 0;
return num > 1024 ? (num/1024 > 1024
? round(num/1024/1024, 2)." Mb" : round(num/1024, 2)." Kb") : num."
字节";
function add_s(&array){
foreach(array as key=>value){
if(!is_array(value)){
array[key]=addslashes(value);
}else{
this->add_s(array[key]);
}
function specialhtml(&array){
if(is_array(array)){//数组处理
foreach(array as key=>value){
if(!is_array(value)){
array[key]=htmlspecialchars(value);
}else{
this->specialhtml(array[key]);
}
}else{
array = htmlspecialchars(array);
}
function msubstr(str, start, len) {
tmpstr = "";
strlen = start + len;
for(i = 0; i < strlen; i++) {
if(ord(substr(str, i, 1)) > 0xa0) {
tmpstr .= substr(str, i, 2);
i++;
} else
tmpstr .= substr(str, i, 1);
return tmpstr;
function alert_msg(msg, direct = "0"){
switch(direct){
case '0'://提示
script = "";
case '1'://提示刷新返回
script = "location.href=\""._SESSION["HTTP_REFERER"]."\";";
break;
case '2'://提示返回
script = "history.back();";
break;
default://提示转向指定页面
script = "location.href=\"".direct."\";";
echo "<script
language='javascript'>window.alert('".msg."');".script."</script>";
exit;
function aweek(gdate = "", first = 0){
if(!gdate) gdate = date("Y-m-d");
w = date("w", strtotime(gdate));//取得一周的第几天,星期天开始0-6
dn = w ? w - first : 6;//要减去的天数
st = date("Y-m-d", strtotime("gdate -".dn." days"));
en = date("Y-m-d", strtotime("st +6 days"));
return array(st, en);//返回开始和结束日期
function checkurl(){
//echo "referer:"._SESSION['HTTP_REFERER'];
if(!isset(_SESSION['HTTP_REFERER'])) {
header("location: index.php");
exit;
urlar = parse_url(_SESSION['HTTP_REFERER']);
if(_SERVER["HTTP_HOST"] != urlar["host"]) {
header("location: index.php");
exit;
}
function readfiles(file){
tdata = "";
fp = fopen(file, "r");
if(filesize(file) <= 0) return;
while(data = fread(fp, filesize(file))){
tdata .= data;
fclose(fp);
return tdata;
}
?>
