array_to_csv.php

<?php

// Array to CSV Function
// Copyright (c) 2014-2016, Ink Plant
// https://inkplant.com/code/array-to-csv
// last updated May 10, 2016

function array_to_csv($data,$args=false) {
    if (!is_array($args)) { $args = array(); }
    foreach (array('download','line_breaks','return','trim') as $key) {
        if (array_key_exists($key,$args)) { $$key = $args[$key]; } else { $$key = false; }
    }

    //for this to work, no output should be sent to the screen before this function is called
    if ($download) {
        if ((is_string($download)) && (substr($download,-4) == '.csv')) { $filename = $download; }
        else { $filename = 'download.csv'; }
        header('Content-Type:text/csv');
        header('Content-Disposition:attachment; filename='.$filename);
    }

    if ($line_breaks == 'windows') { $lb = "\r\n"; }
    else { $lb = "\n"; }

    //get rid of headers row, if it exists (headers should exist as keys)
    if (array_key_exists('headers',$data)) { unset($data['headers']); }

	$csv = '';
    $i = 0;
    foreach ($data as $row) {
        $i++;
        //display headers and save for later
        if ($i == 1) { 
            $c = '';
            $headers = array();
            foreach ($row as $key => $value) {
                $key = str_replace('"','""',$key);
                if ($trim) { $key = trim($key); }
                $csv .= $c.'"'.$key.'"'; $c = ',';
                $headers[] = $key;
            }
            $csv .= $lb;
        }

        //display values
        $c = '';
        foreach ($headers as $key) {
        	$value = $row[$key];
            $value = str_replace('"','""',$value);
            if ($trim) { $value = trim($value); }
            $csv .= $c.'"'.$value.'"'; $c = ',';
        }
        $csv .= $lb;
    }

	$csv = trim($csv);

	if ($return) { return $csv; }
	else { echo $csv; }

    if ($download) { die(); }
}

?>