how to filter filename in file upload

[greedyisg00d]

I have a standard format for my filename which is

user1_name_date

for example:

user1_greedy_09202009

Thus when the user browse for a file with a different filename format it will display an error "Invalid filename format". Any idea on how can this be done. Thanks

[anoopmail]

$matched = preg_match('/user1_.*_\d{8}/', $filename);
echo $matched;

1 if matched, else 0.

[scspl_dilip]

hi,

this is what you are looking for...

<form action="" method="post" enctype="multipart/form-data">
<input id="tmpfile_id" name="tmpfile" type="file">
<input type="submit" onClick="return check_file_format()" value="upload now..">
</form>
<script language="javascript">
function check_file_format()
{
var filename = document.getElementById("tmpfile_id").value;
var splt = filename.split("\");
var final_filename = splt[splt.length-1];
var parts = final_filename.split("_");
if(parts.length != 3)
{
alert("Invalid filename format");
return false;
}
if(parts[0] != "user1")
{
alert("Invalid filename format");
return false;
}
if(parts[1] != "")
{
alert("Invalid filename format");
return false;
}
var datelen = parts[2].length;
if(datelen != 10)
{
alert("Invalid filename format");
return false;
}
return false;
}
</script>