请问像“百_度_知道”这样的，问问题的同时可以上传图片
，
请问如何实现上传时可以在表单中时时预览？
请问在问题提交之前，图片已经存到数据库里了吗？
还是仅仅在前台，提交问题后才存入数据库？
<?php
@session_start();
require_once("./conf/config.php");
$file_type = $_FILES["pic"]["type"];
$file_name = $_FILES["pic"]["name"];
if ((($file_type == "image/gif")
|| ($file_type == "image/jpeg")
|| ($file_type == "image/pjpeg"))
&& ($_FILES["pic"]["size"] < 1000000))
{
if(!is_dir("upload/". date("md") . "/"))
{
mkdir("upload/". date("md") . "/");
}
if (file_exists("upload/" . date("md") . "/" . $file_name))
{
echo "å¾ç " . $file_name . " æ件åå·²åå¨,请æ´æ¢æ件ååè¿è¡ä¸ä¼ . ";
}
else
{
$url = "upload/" . date("md") . "/" .$file_name;
move_uploaded_file($_FILES["pic"]["tmp_name"],
"upload/" . date("md") . "/" . $file_name);
}
}
else
{
echo "å¾çæ件ä¸å¯ç¨";
}
$userId = $_SESSION["userId"];
if($url){
$sql = "insert into photos(url, userId) values('$url', '$userId')";
$query = mysql_query($sql);
if($query){
die('<script>alert("å¾çä¸ä¼ æå");window.location="/photolist.htm";</script>');
}
}
?>追é®
@session_start();
require_once("./conf/config.php");
$file_type = $_FILES["pic"]["type"];
$file_name = $_FILES["pic"]["name"];
if ((($file_type == "image/gif")
|| ($file_type == "image/jpeg")
|| ($file_type == "image/pjpeg"))
&& ($_FILES["pic"]["size"] < 1000000))
{
if(!is_dir("upload/". date("md") . "/"))
{
mkdir("upload/". date("md") . "/");
}
if (file_exists("upload/" . date("md") . "/" . $file_name))
{
echo "å¾ç " . $file_name . " æ件åå·²åå¨,请æ´æ¢æ件ååè¿è¡ä¸ä¼ . ";
}
else
{
$url = "upload/" . date("md") . "/" .$file_name;
move_uploaded_file($_FILES["pic"]["tmp_name"],
"upload/" . date("md") . "/" . $file_name);
}
}
else
{
echo "å¾çæ件ä¸å¯ç¨";
}
$userId = $_SESSION["userId"];
if($url){
$sql = "insert into photos(url, userId) values('$url', '$userId')";
$query = mysql_query($sql);
if($query){
die('<script>alert("å¾çä¸ä¼ æå");window.location="/photolist.htm";</script>');
}
}
?>追é®
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