how to read csv file in jquery using codeigniter framework

Question

suppose this is my csv file

fileempId,lastName,firstName,middleName,street1,street2,city,state,zip,gender,birthDate,ssn,empStatus,joinDate,workStation,locati         


        

Answer 1

I have tried your CSVReader function. It gives me perfect result as per my need. I also like your idea to check if the CSV fields/headers match to one of your database table fields to insert the row. It gives result array as below.

Array
(
    [0] => Array
        (
            [Years] => 1888
            [Make1] => Acura
            [Make2] => Honda
            [Make] => Honda
            [] => Honda
            [Makes] => Toyota
)

I have also tried CSVReader library at this location. https://github.com/bcit-ci/CodeIgniter/wiki/CSVReader But it gives result array with values imploded by comma(,) as below.

Array
(
    [0] => Array
        (
            [Years,Make1,Make2,Make,,Makes,Make] => 1888,Acura,Honda,Toyota,Honda,Toyota,Honda
        )
)

Now SubRed, in your CSVReader function, I have made changes to CSV file's first row name with whitespace at the end. But after that in the CI controller, while I am checking that fields/headers/column_name exists in CSV file with array_key_exists('column_name',$csvdata), it returns false/none because of whitespace in the column_name field at the end. So I have updated your code.

Please refer below updated code and give me any suggestions if any.

EDIT :- Make changes to the foreach loop in parse_lines function in CSVReader file =>

foreach( $this->fields as $id => $field ) {  
    //echo $id;
    //echo $field;
    //In CSV File, trim(remove both end whitespaces) the first line which contains fields names
    $field = trim($field);
    if( isset($elements[$id]) ) 
    {
        $item[trim($field)] = trim($elements[$id]);//In CSV File, trim all the file data
    }
 }

Answer 2

Based on your comment that actually you want to upload your CSV file first to your server then check if the CSV fields/headers match to one of your database table fields to insert the row, here the sample code I made:

CSV Reader (based from this library with some adjustments):

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* CSVReader Class
*
* $Id: csvreader.php 147 2007-07-09 23:12:45Z Pierre-Jean $
*
* Allows to retrieve a CSV file content as a two dimensional array.
* The first text line shall contains the column names.
*
* @author        Pierre-Jean Turpeau
* @link        http://www.codeigniter.com/wiki/CSVReader
*/
class CSVReader {

    var $fields;        /** columns names retrieved after parsing */
    var $separator = ',';    /** separator used to explode each line */

    /**
     * Parse a text containing CSV formatted data.
     *
     * @access    public
     * @param    string
     * @return    array
     */
    function parse_text($p_Text) {
        $lines = explode("\n", $p_Text);
        return $this->parse_lines($lines);
    }

    /**
     * Parse a file containing CSV formatted data.
     *
     * @access    public
     * @param    string
     * @return    array
     */
    function parse_file($p_Filepath) {
        $lines = file($p_Filepath);
        return $this->parse_lines($lines);
    }
    /**
     * Parse an array of text lines containing CSV formatted data.
     *
     * @access    public
     * @param    array
     * @return    array
     */
    function parse_lines($p_CSVLines) {    
        $content = FALSE;
        foreach( $p_CSVLines as $line_num => $line ) {                        
            if( $line != '' ) { // skip empty lines
                $line = trim($line);

                $elements = explode($this->separator, $line);

                if( !is_array($content) ) { // the first line contains fields names
                    $this->fields = $elements;
                    $content = array();
                } else {
                    $item = array();
                    foreach( $this->fields as $id => $field ) {
                        if( isset($elements[$id]) ) {
                            $item[$field] = $elements[$id];
                        }
                    }
                    $content[] = $item;
                }
            }
        }
        return $content;
    }

    /**
     * Get fields
     */
    public function get_fields(){
        return $this->fields;
    }
}

Do upload handler on CI:

public function do_upload()
{
    $config['upload_path'] = './uploads/';
    $config['allowed_types'] = 'csv';
    $config['max_size'] = '100';
    $config['max_width']  = '1024';
    $config['max_height']  = '768';

    $this->load->library('upload', $config);

    if ( ! $this->upload->do_upload('csvfile'))
    {
        $error = array('error' => $this->upload->display_errors());
        $this->load->view('csv_upload', $error);
    }
    else
    {
        $upload_data = $this->upload->data();

        // start to read the CSV file
        $this->load->library('csvreader');
        $file_path = $upload_data['full_path'];

        $csv_data = $this->csvreader->parse_file($file_path); 
        $csv_fields = $this->csvreader->get_fields();

        // list your database table
        $tables = $this->db->list_tables();
        foreach($tables as $table)
        {
            $fields = $this->db->list_fields($table);

            if($fields == $csv_fields) // match to one of database table
            {
                // insert the record
                foreach($csv_data as $row){                        
                    $this->db->insert($table, $row);
                }
            }
        }

        $data = array(
            'upload_data' => $upload_data,
            'csv_data' => $csv_data,
        );

        $this->load->view('upload_success', $data);
    }
}

Download full sample HERE. You can find sample of CSV file inside folder uploads.

Answer 3

I use this library to convert array to some other data format or vice versa.

CI - Rest Server

There you can find library/class Format (Format.php) that you can use to convert CSV to array then save it into your database. This class also support other format:

• xml – almost any programming language can read XML
• json – useful for JavaScript and increasingly PHP apps.
• csv – open with spreadsheet programs
• html – a simple HTML table
• php – Representation of PHP code that can be eval()’ed
• serialize – Serialized data that can be unserialized in PHP

EDIT:

This library works on CSV with delimiter "\n" on each row and "," on each of column, you can use it like this:

$this->load->library('format');

$string_csv = "YOUR CSV";        
$result = $this->format->factory($string_csv, 'csv')->to_array();

var_dump($result);

Just that simple. However as I said above if your have another delimiter then you have to adjust the library as your need. Here the main function to convert CSV to array:

function _from_csv($string)
{
    $data = array();

    // Splits
    $rows = explode("\n", trim($string));
    $headings = explode(',', array_shift($rows));
    foreach ($rows as $row)
    {
        // The substr removes " from start and end
        $data_fields = explode('","', trim(substr($row, 1, -1)));

        if (count($data_fields) == count($headings))
        {
            $data[] = array_combine($headings, $data_fields);
        }
    }

    return $data;
}

EDIT 2:

My example will work on this standard CSV format:

Heading1, Heading2, Heading3
"1","John","London"
"2","Brian","Texas"