<?php
$con=mysqli_connect("localhost","root","root","a_db");
if (mysqli_connect_errno())
{
echo "Failed: " . mysqli_connect_error();
}

$sql = LOAD DATA INFILE '\\test.txt' INTO TABLE a_db.aa;

$result = mysqli_query($con,"SELECT * FROM `aa`");

echo "<table class='people'>
<tr class='titles'>
<th>aaa</th>
</tr>";

while($row = mysqli_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $row['aaa'] . "</td>";
echo "</tr>";
}
echo "</table>";

mysqli_close($con);
?>

<?php
$mysql = new mysqli('localhost', 'root', 'root', 'a_db');
$mysql->query("LOAD DATA INFILE '\\test.txt' INTO TABLE a_db.aa(aaa)");

if (mysqli_connect_errno())
{
echo "Failed: " . mysqli_connect_error();
}



mysqli_close($mysql);
?>

<?php
$mysql = new mysqli('localhost', 'root', 'root', 'a_db');
$mysql->query("LOAD DATA INFILE 'w:\\userdata\\php_upload\\test.txt' INTO TABLE a_db.aa(aaa)");

if (mysqli_connect_errno())
{
echo "Failed: " . mysqli_connect_error();
}

mysqli_close($mysql);
?>

LOAD DATA INFILE 'c:\\openserver\\userdata\\php_upload\\test.txt' INTO TABLE a_db.aa(aaa);

<?php
$mysql = new mysqli('localhost', 'root', 'root', 'a_db');
$mysql->query("LOAD DATA INFILE 'c:\\openserver\\userdata\\php_upload\\test.txt' INTO TABLE a_db.aa(aaa)");

if (mysqli_connect_errno())
{
echo "Failed: " . mysqli_connect_error();
}

mysqli_close($mysql);
?>