Importing CSV FIle In Wordpress Database - php

Question

I wrote a php script to import a CSV file into a wordpress database. I have been working through lots of different errors today which were crashing the website till I fixed them.
Now all the errors are cleared and the string at the end of the function is being printed to the screen as if everything is ok but it is not entering my data to the DB.
Also for testing sake I removed the create DB part and only left the remove to see if it would remove the DB and it did not. So basically it appears my function does not have errors but it is being ran. Also it is not actually doing anything. I do not understand how it could run through the function telling me each time there is an error or a file path that does not exist but not actually carry out the operations I am trying to execute.
Any input on how to troubleshoot this or where to go from here would be appreciated,
function productsExec() {
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
global $wpdb;
global $simple_prod_version;
$table_name = $wpdb->prefix . "wuno_inventory";
if($wpdb->get_var("show tables like '$table_name'") != $table_name) {
$sql = "DROP TABLE IF EXISTS $table_name";
dbDelta($sql);
// $wpdb->query($sql);
$sql = "CREATE TABLE " . $table_name . " (
id int(8) NOT NULL AUTO_INCREMENT,
wuno-product varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
wuno-description varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
wuno-alternates varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
wuno-onhand varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
wuno-condition varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (id)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;";
dbDelta($sql);
// $wpdb->query($sql);
//Upload File
if (is_uploaded_file($_FILES['inventory.csv']['tmp_name'])) {
echo "<h1>" . "File ". $_FILES['inventory.csv']['name'] ." uploaded successfully." . "</h1>";
echo "<h2>Displaying contents:</h2>";
readfile($_FILES['inventory.csv']['tmp_name']);
}
//Import uploaded file to Database
$handle = fopen(inventory.csv, 'w');
while (($data = fgetcsv($handle, 10000, ",")) !== FALSE) {
$insert = "INSERT INTO" . $table_name . "(wuno-product, wuno-description, wuno-alternates, wuno-onhand, wuno-condition)" .
"VALUES ('$data[0]', '$data[1]', '$data[2]', '$data[3]', '$data[4]')";
$results = $wpdb->query( $insert );
}
fclose($handle);
echo 'Everything seems to be running smoothly.';
}
}

Answer 1

As mentioned in comments, and as per OP's request:
INSERT INTO" . $table_name . " translates to, and for example INSERT INTOtablename since there is no space between INFO and "
Plus, you have hyphens for column names that MySQL is translating as wuno MINUS product, as a math equation and the same for the other column names.
Consult http://dev.mysql.com/doc/refman/5.7/en/identifier-qualifiers.html on Identifier Qualifiers
You can use hyphens, but ticks are required to be used around the column names.
$insert = "INSERT INTO " . $table_name . " (`wuno-product`, `wuno-description`, `wuno-alternates`, `wuno-onhand`, `wuno-condition`)
Edit:
I spotted something else.
$handle = fopen(inventory.csv, 'w');
There should be quotes around the filename:
$handle = fopen("inventory.csv", 'w');
as per the manual on fopen() http://php.net/manual/en/function.fopen.php
$handle = fopen("c:\\folder\\resource.txt", "r");
and error reporting would have thrown you a notice about it.
Plus, since you're using $_FILES, and if using a form, it should be a POST method and contain a valid enctype.
http://php.net/manual/en/features.file-upload.post-method.php
However, this seems invalid $_FILES['inventory.csv'] or is unclear.
Usually, the first array parameter is a matching name attribute. Consult the manual link just above.
Also add error reporting to the top of your file(s) which will help find errors.
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
// Then the rest of your code
Sidenote: Displaying errors should only be done in staging, and never production.