500 Internal Server Error PHP timing out - php

Question

I am receiving an internal server error for my PHP script timing out. I am taking 8000 rows from mySQL database and breaking each row into 3 different tables.
I did some research on stack and ran into this as a solution:
set_time_limit(0);
ignore_user_abort(1);
Now, I am just not receiving the error anymore in chrome, but still not adding to the database.
Here is a little bit of pseudo of what I am doing:
$db = new myConnectDB();
$query = "SELECT * FROM tableName";
$result = $db->query($query);
$numRows = $result->num_rows;
//beerName', '$style' , '$brewery', '$abv','$ibu','$breweryID', '$icon', '$iconBrew' , '$lat', '$long' , '$beerRating')";
for ($i=0; $i < 8000 ; $i++) {
//fetch associate
$row = $result->fetch_assoc();
//get all 13 variables from rom
$db2 = new myConnectDB();
//insert some variables into 1st table
mysqli_close($db2);
//todo: insert BeerTable / check and
$db3 = new myConnectDB();
//insert variables into second table
mysqli_close($db3);
//todo: insert BreweryTable / check and update
$db4 = new myConnectDB();
//insert variables into third table.
mysqli_close($db4);
}
echo $i;

Answer 1

This is bad practice to establish and break connection inside a loop. Try to refactor your code this way:
$db = new myConnectDB();
$db2 = new myConnectDB();
$db3 = new myConnectDB();
$db4 = new myConnectDB();
$query = "SELECT * FROM tableName";
$result = $db->query($query);
$numRows = $result->num_rows;
$insertQuery1 = "INSERT INTO tbl1 (col1, col2, col3) VALUES";
$insertQuery2 = "INSERT INTO tbl2 (col1, col2, col3) VALUES";
$insertQuery3 = "INSERT INTO tbl3 (col1, col2, col3) VALUES";
for ($i=0; $i < 8000 ; $i++) {
//fetch associate
$row = $result->fetch_assoc();
//get all 13 variables from rom
//insert some variables into 1st table
$insertQuery1 .= '(' . $val1 . ',' . $val2 . ',' . $val3 ')';
//todo: insert BeerTable / check and
//insert variables into second table
$insertQuery2 .= '(' . $val4 . ',' . $val5 . ',' . $val6 ')';
//todo: insert BreweryTable / check and update
//insert variables into third table.
$insertQuery1 .= '(' . $val7 . ',' . $val8 . ',' . $val9 ')';
}
$db1->query($insertQuery1);
$db2->query($insertQuery2);
$db3->query($insertQuery3);
mysqli_close($db2);
mysqli_close($db3);
mysqli_close($db4);
In this concept you won't query 3 inserts for each row. You collect 3 big insert queries and execute them after the loop. So this code would work faster.