How to extract data from csv file in PHP

I have a csv file which looks like this

$lines[0] = "text, with commas", "another开发者_运维百科 text", 123, "text",5;
$lines[1] = "some without commas", "another text", 123, "text";
$lines[2] = "some text with commas or no",, 123, "text";

And I would like to have a table:

$t[0] = array("text, with commas", "another text", "123", "text","5");
$t[1] = array("some without commas", "another text", "123", "text");
$t[2] = array("some text, with comma,s or no", NULL , "123", "text");

If I use split($lines[0],",") I'll get "text" ,"with commas" ... Is there any elegant way to do it?

You can use fgetcsv to parse a CSV file without having to worry about parsing it yourself.

Example from PHP Manual:

$row = 1;
if (($handle = fopen("test.csv", "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $num = count($data);
        echo "<p> $num fields in line $row: <br /></p>\n";
        $row++;
        for ($c=0; $c < $num; $c++) {
            echo $data[$c] . "<br />\n";
        }
    }
    fclose($handle);
}

In addition to Matt's suggestion, you can also use SplFileObject to read in the file:

$file = new SplFileObject("data.csv");
$file->setFlags(SplFileObject::READ_CSV);
$file->setCsvControl(',', '"', '\\'); // this is the default anyway though
foreach ($file as $row) {
    list ($fruit, $quantity) = $row;
    // Do something with values
}

^{source: http://de.php.net/manual/en/splfileobject.setcsvcontrol.php}

you can read the data using the following function.

  function readCSV() {
    $csv = array_map('str_getcsv', file('data.csv'));
    array_shift($csv); //remove headers


}

http://www.pearlbells.co.uk/how-to-sort-a1a2-z9z10aa1aa2-az9az10-using-php/

here is also a simple method to get read csv file.

$sfp = fopen('/path/to/source.csv','r'); 
$dfp = fopen('/path/to/destination.csv','w'); 
while ($row = fgetcsv($sfp,10000,",","")) { 
 $goodstuff = ""; 
 $goodstuff = str_replace("¦",",",$row[2]); 
 $goodstuff .= "\n"; 
 fwrite($dfp,$goodstuff); 
} 
fclose($sfp); 
fclose($dfp);

Maybe my code solves your problem:

// Parse all content from csv file and generate array from line.
function csv_content_parser($content) {
  foreach (explode("\n", $content) as $line) {
    // Generator saves state and can be resumed when the next value is required.
    yield str_getcsv($line);
  }
}
// Get content from csv file.
$content = file_get_contents('your_file.csv');
// Create one array from csv file's lines.
$data = array();
foreach (csv_content_parser($content) as $fields) {
  array_push($data, $fields);
}

In result you have an array with all values from csv. It would be something like:

Array
(
    [0] => Array
        (
            [0] => text, with commas
            [1] => another text
            [2] => 123
            [3] => text
            [4] => 5
        )

    [1] => Array
        (
            [0] => some without commas
            [1] => another text
            [2] => 123
            [3] => text
        )

    [2] => Array
        (
            [0] => some text, with comma,s or no
            [1] =>  NULL 
            [2] => 123
            [3] => text
        )

)

Suppose you have a create a function for same things, Then it should look like

function csvtoarray($filename='', $delimiter){

    if(!file_exists($filename) || !is_readable($filename)) return FALSE;
    $header = NULL;
    $data = array();

    if (($handle = fopen($filename, 'r')) !== FALSE ) {
        while (($row = fgetcsv($handle, 1000, $delimiter)) !== FALSE)
        {   
            if(!$header){
                $header = $row;
            }else{
                $data[] = array_combine($header, $row);
            }
        }
        fclose($handle);
    }
    if(file_exists($filename)) @unlink($filename);

    return $data;
}

$data = csvtoarray('file.csv', ',');

print_r($data);

You could use something like https://github.com/htmlburger/carbon-csv that allows column mapping:

$csv = new \Carbon_CSV\CsvFile('path-to-file/filename.csv');
$csv->set_column_names([
    0 => 'first_name',
    1 => 'last_name',
    2 => 'company_name',
    3 => 'address',
]);
foreach ($csv as $row) {
    print_r($row);
}

The result of the below code would be something like:

Array
(
    [0] => Array
        (
            [first_name] => John
            [last_name] => Doe
            [company_name] => Simple Company Name
            [address] => Street Name, 1234, City Name, Country Name
        )
    [1] => Array
        (
            [first_name] => Jane
            [last_name] => Doe
            [company_name] => Nice Company Name
            [address] => Street Name, 5678, City Name, Country Name
        )
)

Another library that does the same thing(and much more) is http://csv.thephpleague.com/9.0/reader/

When you want to keep the index (first line) for multidimensional result array, you can use:

$delim      = ';';
$csvFile    = file($csv_file);
$firstline  = str_getcsv($csvFile[0], $delim);
$data       = array();
foreach ($csvFile as $line) {
    $line   = str_getcsv($line, $delim);
    $data[] = array_combine($firstline, $line);
}

I've built an application to extract data from a CSV file , this php application was used to show a daily quote for users.

The full project on github: 365-quotes-php-csv.

Also this is the class Code for the application i've built

  <?php
/*
Main Class 
please note :
1- the CSV file must be comma separated (,) and each line must End with (;).
2- Feel free to edit the all.CSV file and add all of your 366 New Quotes.
3- don't change any thing specially the CSV file Location.
---------------------------------------------------------------------------
RISS.WORK all copy rights reserved 2018
please Don't Remove
Github/RissWork
Email : info@riss.work
*/
class Quote{

    //properties
        private $_quote,$_allQuotes;
        private static $_instance = null;

    //Constructor
        private function __construct(){
            //Day Count
            $dayCount = date(z);

            if($this->readCsvAndGetQuote($dayCount)){
                return $this->getQuote();
            }else{
                echo 'Error Cannot open the .CSV File';
            }
        }





    //Methods

    //get Instance
    public function getInstance(){
            if(!isset(self::$_instance)){
                self::$_instance = new Quote();
            }
            return self::$_instance;
        }//end of get Instance




    //get daily Quote   
    public function getQuote(){
            return $this->_quote;
        }//end of get Quote




    //Read CSV
    private function readCsvAndGetQuote($dayCount = 1 ){

        if(($handel = fopen("csv/all.csv" , "r")) !== false){
            $this->_allQuotes = fgetcsv($handel,1000000,';');
            $this->_quote = explode(',',$this->_allQuotes[$dayCount]);
            return true;
        }
        return false;

    }//end of read CSV



}//end of Class

Return a php mapping array with the column of interests :

public function extractCSVDatas($file_uri) {
    $AliasToSystemPathMappingArray = [];
    if (($handle = fopen($file_uri, "r")) !== FALSE) {
      $csv = array_map('str_getcsv', file($file_uri));

      //remove header and choose columns among the list:
      foreach((array_slice($csv,1)) as $line) {
        list($id, $alias, $systemPath) = explode(';',$line[0]);
        $AliasToSystemPathMappingArray[] = [$alias, $systemPath];
      }
      fclose($handle);
    }
    return $AliasToSystemPathMappingArray;
  }

/**
 * @return mixed[]
 */
public function csvToArray(string $delimiter, string $filename = ''): array
{
    $data = [];
    if (file_exists($filename) && is_readable($filename)) {
        $header = null;

        if (($handle = fopen($filename, 'r')) !== false) {
            while (($row = fgetcsv($handle, 1000, $delimiter)) !== false) {
                if (!$header) {
                    $header = $row;
                } else {
                    $data[] = array_combine($header, $row);
                }
            }
            fclose($handle);
        }
    }

    return $data;
}

And why must it be simple when it can be complicated?

Joke aside, here is a quick and easy solution using the PHP function str_getcsv()

Here is an example:

function parse_csv( $filename_or_text, $delimiter=',', $enclosure='"', $linebreak="\n" )
{
    $return = array();
    
    if(false !== ($csv = (filter_var($filename_or_text, FILTER_VALIDATE_URL) ? file_get_contents($filename_or_text) : $filename_or_text)))
    {
        $csv = trim($csv);
        $csv = mb_convert_encoding($csv, 'UTF-16LE');   
        
        foreach(str_getcsv($csv, $linebreak, $enclosure) as $row){
            $col = str_getcsv($row, $delimiter, $enclosure);
            $col = array_map('trim', $col);
            $return[] = $col;
        }
    }
    else
    {
        throw new \Exception('Can not open the file.');
        $return = false;
    }
    
    return $return;
}

Imagine a situation where you need a function that works with both URL and comma delimited text. This is exactly the function that works like that. Just simply insert a CSV URL or comma separated text and it work nicely.

Just created a function that extracts data from .csv file or csv formatted text and then parses it for more convenient usage (presuming the first line is the columns). Works with however many rows/columns you'd like/have, just simply point the function to the file location/string and it will return the results!

function csvParse($input, $callback = false){
    $results = [];
    $raw_array = (is_file($input)) ? array_map('str_getcsv', file($input)) : array_map('str_getcsv', explode("\n", $input));
    $array = array_splice($raw_array, 1, count($raw_array));
    foreach($raw_array[0] as $c) $columns[] = $c;
    foreach($array as $key0 => $val0) 
        foreach($val0 as $key1 => $val1) 
            $results[$key0][$columns[$key1]] = $val1;
    if(is_callable($callback)) call_user_func_array($callback, array($results));
    else return $results;
}

# Either One Would Work
$input = "dir/file.csv";
$input = "name,age,occupation,city\nCrimin4L,24,Programmer,New York\nMrAwesome,20,Gamer,Los Angeles";

# Usage #1
$array = csvParse($input);
var_export($array);

# Usage #2
csvParse($input, function($array){
    var_export($array);
});

Input:

name,age,occupation,city
Crimin4L,24,Programmer,New York
MrAwesome,20,Gamer,Los Angeles

Array Output:

array (
  0 => 
  array (
    'name' => 'Crimin4L',
    'age' => '24',
    'occupation' => 'programmer',
    'city' => 'New York',
  ),
  1 => 
  array (
    'name' => 'MrAwesome',
    'age' => '20',
    'occupation' => 'gamer',
    'city' => 'Los Angeles',
  ),
)

Live Demo: https://ideone.com/Sa1aMO