importing an .sql.gz file into mysql using php - php

Question

I am currently working on an script that will easily import an backup in 2 clicks, but i can't find any information on how to import and .gz file.
and .sql file works great but if im going to decompress it i can just aswell just import it using phpmyadmin.
when i currently try to import the .gz file i just get one massive error of unreadable characters.
How can i make it so i can import an .gz file
The point here is that it is an WEB based importer
$userName = "root";
$password = "";
$dbName = "test";
$conn = #new mysqli($serverName,$userName,$password,$dbName);
if ($conn->connect_errno) {
echo "Failed to connect to MySQL: " . $con->connect_errno;
echo "<br/>Error: " . $con->connect_error;}
$fileName = "189_dump.sql.gz";
$temp = "";
$lines = file($fileName);
foreach($lines as $line){
if(substr($line, 0, 2) == '--' || $line == '')
continue;
$temp .= $line;
if(substr(trim($line), -1, 1) == ';'){
$conn->query($temp) or print('Error performing query \'<strong>' . $temp . '\': '. '<br /><br />');
$temp = "";
}
}
echo "imported db (or not)";
?>

Answer 1

This is how i fixed it:
$lines = gzfile($fileName);
<?php
class reader{
public $dbName;
public $fileName;
public function import($dbName, $fileName){
$serverName = "localhost";
$userName = "root";
$password = "";
$conn = new mysqli($serverName,$userName,$password,$dbName);
$temp = "";
$lines = gzfile($fileName);
foreach($lines as $key => $line ){
if(substr($line, 0, 2) == '--' || $line == '') continue;
$temp .= $line;
if(substr(trim($line), -1, 1) == ';'){
$conn->query($temp) or print('Error performing query \'<strong>' . $temp . '\': '. '<br /><br />');
$temp = "";}
}
echo "<script>alert('Database Imported')</script>";
}
}
$bestand = new reader();
# dbname | file name
$bestand->import("test", "testdb.sql.gz");
?>

Answer 2

If you have system() allowed you can:
<?php
system("gzip -dc < ".$file." | mysql -u $dbuser -p$dbpassword $dbname");