PHP - Read modify write to CSV file - Output CSV file

<?php

error_reporting(E_ALL);
ini_set('display_errors', '1');


function fgetcsv_PHP()
{
    /*
     * See if we can open a file named fgetcsv.csv in
     * read mode, if we can then assign pointer to this
     * file to a variable named $handle
     * 'r' - Open for reading only; place the file
     *  pointer at the beginning of the file.
     */
    if (($handle = fopen("markers.csv", "r")) !== FALSE)
    {
        /*
         * fgetcsv( resource $handle  int $length  string $delimiter )
         *
         * resource $handle
         * A valid file pointer to a file successfully opened by fopen(),
         * popen(), or fsockopen().
         *
         * int $length
         * Must be greater than the longest line (in characters) to be
         * found in the CSV file (allowing for trailing line-end characters).
         * It became optional in PHP 5. Omitting this parameter (or setting
         * it to 0 in PHP 5.0.4 and later) the maximum line length is not
         * limited, which is slightly slower.
         *
         * string $delimiter
         * Set the field delimiter (one character only).
         *
         * RETURN VALUES
         *
         * Returns an indexed array containing the fields read.
         *
         * Note: A blank line in a CSV file will be returned as an array
         *       comprising a single null field, and will not be treated
         *       as an error.
         *
         * Note: If PHP is not properly recognizing the line endings when
         *       reading files either on or created by a Macintosh computer,
         *       enabling the auto_detect_line_endings run-time configuration
         *       option may help resolve the problem.
         *
         * fgetcsv() returns NULL if an invalid handle is supplied or FALSE
         * on other errors, and when the end of file has been reached.
         */
 
 
        $length = 5000;
        $delimiter = ",";
 
        /*
         * Print the opening table tag to begin buiding HTML table
         * and the first row of the table; with column names
         */
        
 
        $csvData = array();
        /*
         * Loop through the array of values returned by fgetcsv until there are
         * no more lines (indicated by FALSE)
         */
        // while ( ( $data = fgetcsv( $handle, $length, $delimiter ) ) !== FALSE )
        // {
        //     // Count number of array elements in $data
        //     $num = count($data);
 
        //     for ($c=0; $c < $num; $c++)
        //     {
        //         // if ($c == 1){
        //         //   echo "<td>".$data[1]."<br>".$data[2]."<br>".$data[3]."<br>".$data[4]."<br>".$data[5]."<br>".$data[6]."<br>".$data[7]."</td>\n";
        //         // } else {
        //         //   echo "<td>".$data[$c]."</td>\n";
        //         // }
        //         if($c == 1){
        //           $csvData[$c][] = 
        //             $data[1]."<br>".$data[2]." ".$data[3]."<br>".$data[4].", ".$data[5].", ".$data[6]."<br>".$data[7];
        //         } else {
        //           $csvData[$c][] = $data[$c];
        //         }
        //     }

           
        // }
        while (($line = fgetcsv($handle)) !==FALSE )
        { 

            
            
            if ($line[1]){
              $line[1] = $line[1]."<br>".$line[2]." ".$line[3]."<br>".$line[4]." ".$line[5]."<br>".$line[6];
              
            } 
            $a[] = $line;
            
            
        }
  
 
        // Close the file pointed to by $handle
        fclose($handle);

        
    }
    return $array = str_replace('"', '', $a);
    
}

function outputCSV($data) {
    $outputBuffer = fopen("php://output", 'w');
    foreach($data as $val) {
        fputcsv($outputBuffer, $val);
    }
    fclose($outputBuffer);
}

header("Content-type: text/csv");
header("Content-Disposition: attachment; filename=example.csv");
header("Pragma: no-cache");
header("Expires: 0");

outputCSV(fgetcsv_PHP());



// print_r(fgetcsv_PHP());