create multidimensional associative array from CSV in PHP

Question

I'm trying to create a multidimensional array in PHP where the inner arrays are associative for the following example CSV string $csv:

# Results from 2015-06-16 to 2015-06-16.
date,time,label,artist,composer,album,title,duration
2015-06-16,12:00 AM,Island,U2,"Clayton- Adam,The Edge,Bono,Mullen- Larry- Jr",Songs Of Innocence,SONG FOR SOMEONE,03:46
2015-06-16,12:04 AM,Lowden Proud,"Fearing & White, Andy White, Stephen Fearing","White- Andy,Fearing- Stephen",Tea And Confidences,SECRET OF A LONG LASTING LOVE,03:10
2015-06-16,12:07 AM,Columbia,The Wallflowers,"Dylan- Jakob,Irons- Jack,Mathis- Stuart,Richling- Greg,Jaffee- Rami",Glad All Over,REBOOT THE MISSION,03:31
2015-06-16,12:10 AM,Distort Light,Bend Sinister,Moxon- Daniel,"Stories Of Brothers, Tales Of Lovers",JIMMY BROWN,03:48

The number of actual data rows following the 3rd+ row format is variable. What I have done so far is made a plain multidimensional array:

$resultArray = str_getcsv($csv, PHP_EOL);//parse the rows
array_shift($resultArray);//shift out results first row: date info
array_shift($resultArray);//shift out results new first row: field labels
foreach($resultArray as &$row) {//parse the items in rows
    $row = str_getcsv($row, ",", '"');//removes the '"' field enclosure?
}//foreach

This makes a functional multidimensional array but what I can't figure out is how to make the inner arrays associative so I can access them using the text friendly keys from the array I anticipated using:

$rowFieldKeysArray = array('date', 'time', 'label', 'artist', 'composer', 'album', 'title', 'duration');

I'm sure there's a simple PHP way to use the key name array as the keys for an associative array but I'm not sure how to do that. I rather suspect I need to something along the lines of:

foreach($resultArray as $rowKey => &$row) {
    $row[$rowFieldKeysArray[$rowKey]] = str_getcsv($row, ",", '"');
}//foreach

But this yields a "Warning: Illegal string offset 'date'[...]".

How would I do this?

EDIT: based on the combined information provided by the link in Andrew's comment and the in the answer I accepted, I was able to solve this problem using the following efficient code:

    $resultArray = str_getcsv($csv, PHP_EOL);//parse the rows
    array_shift($resultArray);//shift out results first row: date info
    $rowFieldKeysArray = str_getcsv( array_shift($resultArray), "," );//shift out results new first row: field labels into field key name array
    //array('date', 'time', 'label', 'artist', 'composer', 'album', 'title', 'duration');//array of Key field names for associative array
    //       [0]     [1]      [2]      [3]        [4]        [5]      [6]       [7]      //key index
    foreach($resultArray as &$row) {//parse the items in rows
        $row = array_combine($rowFieldKeysArray, str_getcsv($row, ",", '"'));//array_combine replaces numeric indexes with key field labels
    }//foreach

Thank you!

Answer 1

This may help you

Script - For csv to array from file

[akshay@localhost tmp]$ cat test.php
<?php

function csv_to_array($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, 0, $delimiter)) !== FALSE)
        {

            if(!$header)
            {
               $header = $row;
            }
            else
            {
                if(count($header)!=count($row)){ continue; }

                $data[] = array_combine($header, $row);
            }
        }
        fclose($handle);
    }
    return $data;
}

print_r(csv_to_array("/tmp/test.csv"));

?>

Script - For csv to array from string

[akshay@localhost tmp]$ cat test.php
<?php

function str_to_csv_to_array($string, $delimiter=',')
{
        $header = NULL;
        $data = array();
        $rows = explode(PHP_EOL, $string); 
        foreach($rows as $row_str)
        {
            $row = str_getcsv($row_str);
            if(!$header)
            {
               $header = $row;
            }
            else
            {
                if(count($header)!=count($row)){ continue; }

                $data[] = array_combine($header, $row);
            }
        }

    return $data;
}


$string = <<<EOF
date,time,label,artist,composer,album,title,duration
2015-06-16,12:00 AM,Island,U2,"Clayton- Adam,The Edge,Bono,Mullen- Larry- Jr",Songs Of Innocence,SONG FOR SOMEONE,03:46
2015-06-16,12:04 AM,Lowden Proud,"Fearing & White, Andy White, Stephen Fearing","White- Andy,Fearing- Stephen",Tea And Confidences,SECRET OF A LONG LASTING LOVE,03:10
2015-06-16,12:07 AM,Columbia,The Wallflowers,"Dylan- Jakob,Irons- Jack,Mathis- Stuart,Richling- Greg,Jaffee- Rami",Glad All Over,REBOOT THE MISSION,03:31
2015-06-16,12:10 AM,Distort Light,Bend Sinister,Moxon- Daniel,"Stories Of Brothers, Tales Of Lovers",JIMMY BROWN,03:48
EOF;

print_r(str_to_csv_to_array($string));
?>

Input file

[akshay@localhost tmp]$ cat test.csv
date,time,label,artist,composer,album,title,duration
2015-06-16,12:00 AM,Island,U2,"Clayton- Adam,The Edge,Bono,Mullen- Larry- Jr",Songs Of Innocence,SONG FOR SOMEONE,03:46
2015-06-16,12:04 AM,Lowden Proud,"Fearing & White, Andy White, Stephen Fearing","White- Andy,Fearing- Stephen",Tea And Confidences,SECRET OF A LONG LASTING LOVE,03:10
2015-06-16,12:07 AM,Columbia,The Wallflowers,"Dylan- Jakob,Irons- Jack,Mathis- Stuart,Richling- Greg,Jaffee- Rami",Glad All Over,REBOOT THE MISSION,03:31
2015-06-16,12:10 AM,Distort Light,Bend Sinister,Moxon- Daniel,"Stories Of Brothers, Tales Of Lovers",JIMMY BROWN,03:48

Both script would output

[akshay@localhost tmp]$ php test.php
Array
(
    [0] => Array
        (
            [date] => 2015-06-16
            [time] => 12:00 AM
            [label] => Island
            [artist] => U2
            [composer] => Clayton- Adam,The Edge,Bono,Mullen- Larry- Jr
            [album] => Songs Of Innocence
            [title] => SONG FOR SOMEONE
            [duration] => 03:46
        )

    [1] => Array
        (
            [date] => 2015-06-16
            [time] => 12:04 AM
            [label] => Lowden Proud
            [artist] => Fearing & White, Andy White, Stephen Fearing
            [composer] => White- Andy,Fearing- Stephen
            [album] => Tea And Confidences
            [title] => SECRET OF A LONG LASTING LOVE
            [duration] => 03:10
        )

    [2] => Array
        (
            [date] => 2015-06-16
            [time] => 12:07 AM
            [label] => Columbia
            [artist] => The Wallflowers
            [composer] => Dylan- Jakob,Irons- Jack,Mathis- Stuart,Richling- Greg,Jaffee- Rami
            [album] => Glad All Over
            [title] => REBOOT THE MISSION
            [duration] => 03:31
        )

    [3] => Array
        (
            [date] => 2015-06-16
            [time] => 12:10 AM
            [label] => Distort Light
            [artist] => Bend Sinister
            [composer] => Moxon- Daniel
            [album] => Stories Of Brothers, Tales Of Lovers
            [title] => JIMMY BROWN
            [duration] => 03:48
        )

)