CSV file upload not working - php

Question

I am trying to import csv file to database table using php. The problem is uploaded file is not recognized as csv file in the receiving page. Here is my code:
My form:
<form enctype='multipart/form-data' method='post' action="new_campaign.php" class="add_campaign_form">
<table class="add_campaign_table">
<tr>
<td><label>Campaign Name<label></td>
</tr>
<tr>
<td><input type="text" id="name" class="name" name="camp_name" value='' required/></td>
</tr>
<tr>
<td><label>Notes<label></td>
</tr>
<tr>
<td><textarea id="notes" name="camp_note" rows="4" cols="50" maxlength="250" placeholder="Campaign details" value='' required>
</textarea></td>
</tr>
<tr>
<td><label>Upload CSV File<label></td>
</tr>
<tr>
<td><input type="file" name="csv_file" id="csv" /></td>
</tr>
</table>
<input type="submit" class="submit" alt="Submit" width="120" height="30"/>
<br><br>
</form>
new_campaign.php
if(isset($_FILES) && $_FILES["file"]['error']==0){
if (($_FILES["file"]["type"] == "application/vnd.ms-excel")) {
if ($_FILES["file"]["error"] > 0) {
echo "error uploading the file";
}
else {
echo "hooray!";
}
}
else {
echo "this is not a csv file";
}
}
else{
echo "no files";
}
It keeps throwing me : "this is not a csv file"
I am getting the other field values in the receiving page. Any help?

Answer 1

Thanks Sean. Here is the working code:
if(isset($_FILES) && $_FILES["csv_file"]['error']==0){
//echo "file type: ".$_FILES["csv_file"]["type"];
if (($_FILES["csv_file"]["type"] == "text/csv")) {
if ($_FILES["text/csv"]["error"] > 0) {
echo "error uploading the file";
}
else {
echo "hooray!";
}
}
else {
echo "this is not a csv file";
}
}
else{
echo "no files";
}

Answer 2

Your input is name="csv_file"
<input type="file" name="csv_file" id="csv" />
So it should be
if(isset($_FILES) && $_FILES["csv_file"]['error']==0){
if (($_FILES["csv_file"]["type"] == "application/vnd.ms-excel")) {
if ($_FILES["csv_file"]["error"] > 0) {
...
not $_FILES["file"]['error']/$_FILES["file"]["type"]