Import a single CSV file into multiple tables in MySQL - php

Question

I would like to import a single CSV with 7 columns into 2 tables in MySQL.
Columns 1, 2 and 3 go into a single row in table1. Columns 4 and 5 go as a row in table2. Columns 6 and 7 go as a row again in same table2.
How can this be done using PHP or mysql directly?

Answer 1

First fetch all values from csv and store it in an array. Then maintain your array as per your requirement and then start looping and inserting.

Answer 2

<?php
$efected = 0;
$file_temp = $_FILES["file"]["tmp_name"];
$handle = fopen($file_temp, "r"); // opening CSV file for reading
if ($handle) { // if file successfully opened
$i=0;
while (($CSVrecord = fgets($handle, 4096)) !== false) { // iterating through each line of our CSV
if($i>0)
{
list($name, $gender, $website, $category, $email, $subcat) = explode(',', $CSVrecord); // exploding CSV record (line) to the variables (fields)
//print_r($subcat); sub_cat_ids
if($email!='')
{
$chk_sql = "select * from employees where employee_email='".$email."'";
$chk_qry = mysqli_query($conn, $chk_sql);
$chk_num_row = mysqli_num_rows($chk_qry);
$cat_array = array(trim($category));
$subcat_array = explode( ';', $subcat );
if(count($subcat_array)>0)
{
$subcat_array_new = array();
foreach($subcat_array as $key => $val)
{
$subcat_array_new[] = trim($val);
}
}
$cat_sub_cat_merge = array_merge($cat_array, $subcat_array_new);
$cat_subcat_comma = implode( "','", $cat_sub_cat_merge );
foreach($cat_array as $cat_key => $cat_val)
{
$chk_cat_sql = "select * from employee_cats where cats_name = '".$cat_val."'";
$chk_cat_qry = mysqli_query($conn, $chk_cat_sql);
$chk_cat_num_row = mysqli_num_rows($chk_cat_qry);
//$all_cat_array = array();
if($chk_cat_num_row == 0)
{
$new_cat_ins = "insert into employee_cats set cats_name = '".$cat_val."', parent_cat_id = '0' ";
$new_cat_ins_qry = mysqli_query($conn, $new_cat_ins);
}
}
foreach($subcat_array_new as $subcat_key => $subcat_val)
{
$chk_subcat_sql = "select * from employee_cats where cats_name = '".$subcat_val."'";
$chk_subcat_qry = mysqli_query($conn, $chk_subcat_sql);
$chk_subcat_num_row = mysqli_num_rows($chk_subcat_qry);
//$all_cat_array = array();
if($chk_subcat_num_row == 0 && trim($subcat_val)!='')
{
//$category
$get_catid_sql = "select * from employee_cats where cats_name = '".trim($category)."'";
$chk_catid_qry = mysqli_query($conn, $get_catid_sql);
$fetch_cat_info = mysqli_fetch_array($chk_catid_qry);
$fetch_cat_id = $fetch_cat_info['cats_id'];
$new_subcat_ins = "insert into employee_cats set cats_name = '".$subcat_val."', parent_cat_id = '".$fetch_cat_id."' ";
$new_subcat_ins_qry = mysqli_query($conn, $new_subcat_ins);
}
}
$get_cat_sql = "select * from employee_cats where cats_name in ('".$cat_subcat_comma."')";
$get_cat_qry = mysqli_query($conn, $get_cat_sql);
$get_cat_num_row = mysqli_num_rows($get_cat_qry);
$sub_category_ids = array();
if($get_cat_num_row>0)
{
while($fetch_cat_id = mysqli_fetch_array($get_cat_qry))
{
if($fetch_cat_id['parent_cat_id']==0)
{
$category_id = $fetch_cat_id['cats_id'];
}
else
{
$sub_category_ids[] = $fetch_cat_id['cats_id'];
}
}
$sub_cat_id_vals_comma = implode(",", $sub_category_ids);
}
else
{
$category_id = 0;
$sub_cat_id_vals_comma = "";
}
if($chk_num_row>0)
{
// and here you can easily compose SQL queries and map you data to the tables you need using simple variables
$update_sql = "update employees set
employee_name='".$name."',
employee_gender='".$gender."',
employees_website='".$website."',
employees_cat_id='".$category_id."',
sub_cat_ids='".$sub_cat_id_vals_comma."'
where employee_email='".$email."'";
$mysqli_qry = mysqli_query($conn, $update_sql);
}
else
{
// and here you can easily compose SQL queries and map you data to the tables you need using simple variables
$insert_sql = "insert into employees set
employee_name='".$name."',
employee_gender='".$gender."',
employees_website='".$website."',
employees_cat_id='".$category_id."',
sub_cat_ids='".$sub_cat_id_vals_comma."',
employee_email='".$email."'";
$mysqli_qry = mysqli_query($conn, $insert_sql);
}
$efected = 1;
}
}
$i++;
}
fclose($handle); // closing file handler
}
if($efected==1)
{
header('location:'.$site_url.'?import=success');
}
else
{
header('location:'.$site_url.'?import=failed');
}
?>