how to upload a csv file and update the mysql db? [closed] - php

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Closed 10 years ago.
I want to use a csv file to update the mysql scv table. how to code ? I have no experiece doing this job.
<p>please select a scv file to upload</p>
<form action="index.php" method="post">
<input type="file" name="scv" />
<input type="submit" value="submit" />
</form>
<?php
mysql_connect('localhost','root','admin');
mysql_select_db('linjuming');
// how to upload a scv file and insert or update the "csv" table?
?>

Answer 1

Your upload file:
<form action="upload_target.php" method="post" enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>
Your upload_target.php
$ext = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);
if ($ext == "csv" && $_FILES["file"]["error"] == 0)
{
$target = "upload/" . $_FILES["file"]["name"];
move_uploaded_file($_FILES["file"]["tmp_name"], $target);
if (($handle = fopen($target, "r")) !== FALSE)
{
while (($data = fgetcsv($handle, 1000, ";")) !== FALSE)
{
print_r($data);
}
fclose($handle);
}
}
Very basic and with very few checks / validations. The print_r($data) contains one line of your csv that you can now insert in your database.
However, I would recommend using PDO or MySQLi for that task, since the mysql functions of PHP will be deprecated in the future.

Answer 2

There's several parts of this:
First, your form MUST have the enctype set, as follows:
<form enctype="multipart/form-data" action="index.php" method="post">
Otherwise, it will not accept file uploads.
Once you've done that, then you can access the file using the $_FILES variable. After the file has been uploaded, then you can access it like so:
if (isset($_FILES["scv"])) {
$file = $_FILES["scv"];
$file_name = $file["name"];
$ext = pathinfo($file_name, PATHINFO_EXTENSION);
if ($ext!="CSV" && $ext!="TXT") {
die('The file must be csv or txt format.');
}
$saveto_path_and_name = '/path/to/file.csv'; // Where you want to save the file
move_uploaded_file($file["tmp_name"], $saveto_path_and_name);
}
Once you've saved the file, you then can open it and import it. That's not trivial to do, but here's some primer code:
// Open the file for reading
$handle = #fopen($saveto_path_and_name, "r") or die(__("Unable to open uploaded file!", "inventory"));
// Grab the first row to do some checks
$row = fgets($inv_file, 4096);
// See if it's comma or tab delimited
if (stripos($inv_row, "\t")) {
$sep = "\t";
} else {
$sep = ",";
}
while ( ! feof($handle)) {
$rowcount = 0;
// Get the individual fields
$inv_fields = explode($sep, $inv_row);
$fields = array();
// Iterate through the fields to do any sanitization, etc.
foreach ($inv_fields as $field) {
// Highly recommended to sanitize the variable $field here....
$fields[] = $field;
$rowcount++;
}
// This is where you would write your query statement to insert the data
// This is just EXAMPLE code. Use the DB access of your choice (PDO, MySQLi)
$sql = vsprintf('INSERT INTO `table` (`column`, `column2`, ...) VALUES (%s, %d, ...)', $fields);
// Get the next row of data from the file
$row = fgets($inv_file, 4096);
}