Insertion de base en php

nom voici mon code
<?php
if (isset ($_POST['valider'])){
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "pizza";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}

$pizzaparis=$_POST['pizzaparis'];
$monfichier =fopen($pizzaparis, 'r');
$lignes = file($pizzaparis);
$nb_ligne =count($lignes);
$i=0;
foreach ($lignes as $lineContent)
{
$lineContent=str_replace("- ","",$lineContent);
$lineContent=str_replace("[","",$lineContent);
$lineContent=str_replace("]","",$lineContent);
$lineContent=str_replace('"','',$lineContent);
$lineContent=str_replace("(","",$lineContent);
$lineContent=str_replace(";","",$lineContent);
$lineContent=str_replace(")","",$lineContent);

echo"<br>",$lineContent."<br>";
$pieces = explode(" ", $lineContent);
for ($i=0; $i<count($pieces) ; $i++)
{
echo " pieces ".$i." = ".$pieces[$i]."<br>";
}
$a=$pieces[0];
$b=$pieces[1];
$c=$pieces[2];
$d=$pieces[3]." ".$pieces[4];
$e=$pieces[5]." ".$pieces[6];
$f=$pieces[7]." ".$pieces[8];
$g=$pieces[9];
$h=$pieces[10]." ".$pieces[11]." ".$pieces[12]." ".$pieces[13]." ".$pieces[14]." ".$pieces[15]." ".$pieces[16]." ".$pieces[17];
$k=$pieces[18]." ".$pieces[19]." ".$pieces[20]." ".$pieces[21];

echo $a,$b,$c,$d,$e,$f,$g,$h,$k;

}

$sql= "INSERT INTO pizza1(url,adresse,date,cod1,lien1,cod2,lien2,lien3,lien4) VALUES ('".$a."','".$b."','".$c."','".$d."','".$e."','".$f."','".$g."','".$h."','".$k."')";

if ($conn->query($sql)=== true)
{
$stat = "New record created successfully";
//echo "New record created successfully";
}
else
{
$stat = "Error: " . $sql . "<br>" . $conn->error;
//echo "Error: " . $sql . "<br>" . $conn->error;
}

echo $stat;

fclose($monfichier);
$conn->close();
}
?>