Convert php array to csv string

Question

I have several method to transform php array to csv string both from stackoverflow and google. But I am in trouble that if I want to store mobile number such as 01727499452,

Answer 1

This is what you need

$out = "";
foreach($array as $arr) {
    $out .= implode(",", $arr) . PHP_EOL;

}

It runs through your array creating a new line on each loop seperating the array values with a ",".

Answer 2

Here is a solution that is a little more general purpose. I was actually looking for a way to make string lists for SQL bulk inserts. The code would look like this:

foreach ($rows as $row) {
    $string = toDelimitedString($row);
    // Now append it to a file, add line break, whatever the need may be
}

And here is the useful function that I ended up adding to my tookit:

/**
 * Convert an array of strings to a delimited string. This function supports CSV as well as SQL output since
 * the quote character is customisable and the escaping behaviour is the same for CSV and SQL.
 *
 * Tests:
 *  echo toDelimitedString([], ',', '\'', true) . "\n";
 *  echo toDelimitedString(['A'], ',', '\'', true) . "\n";
 *  echo toDelimitedString(['A', 'B'], ',', '\'', true) . "\n";
 *  echo toDelimitedString(['A', 'B\'C'], ',', '\'', true) . "\n";
 *  echo toDelimitedString([], ',', '\'', true) . "\n";
 *  echo toDelimitedString(['A'], ',', '"', true) . "\n";
 *  echo toDelimitedString(['A', 'B'], ',', '"', true) . "\n";
 *  echo toDelimitedString(['A', 'B"C'], ',', '"', true) . "\n";
 *
 * Outputs:
 *  <Empty String>
 *  'A'
 *  'A','B'
 *  'A','B''C'
 *  <Empty String>
 *  "A"
 *  "A","B"
 *  "A","B""C"
 *
 * @param array $array A one-dimensional array of string literals
 * @param string $delimiter The character to separate string parts
 * @param string $quoteChar The optional quote character to surround strings with
 * @param bool $escape Flag to indicate whether instances of the quote character should be escaped
 * @return string
 */
function toDelimitedString(array $array, string $delimiter = ',', string $quoteChar = '"', bool $escape = true)
{
    // Escape the quote character, since it is somewhat expensive it can be suppressed
    if ($escape && !empty($quoteChar)) {
        $array = str_replace($quoteChar, $quoteChar . $quoteChar, $array);
    }

    // Put quotes and commas between all the values
    $values = implode($array, $quoteChar . $delimiter . $quoteChar);

    // Put first and last quote around the list, but only if it is not empty
    if (strlen($values) > 0) {
        $values = $quoteChar . $values . $quoteChar;
    }

    return $values;
}

Answer 3

You could use str_putcsv function:

if(!function_exists('str_putcsv'))
{
    function str_putcsv($input, $delimiter = ',', $enclosure = '"')
    {
        // Open a memory "file" for read/write...
        $fp = fopen('php://temp', 'r+');
        // ... write the $input array to the "file" using fputcsv()...
        fputcsv($fp, $input, $delimiter, $enclosure);
        // ... rewind the "file" so we can read what we just wrote...
        rewind($fp);
        // ... read the entire line into a variable...
        $data = fread($fp, 1048576);
        // ... close the "file"...
        fclose($fp);
        // ... and return the $data to the caller, with the trailing newline from fgets() removed.
        return rtrim($data, "\n");
    }
 }

 $csvString = '';
 foreach ($list as $fields) {
     $csvString .= str_putcsv($fields);
 }

More about this on GitHub, a function created by @johanmeiring.

Answer 4

Inspired by @alexcristea's answer:

function array2csv($data, $delimiter = ',', $enclosure = '"', $escape_char = "\\")
{
    $f = fopen('php://memory', 'r+');
    foreach ($data as $item) {
        fputcsv($f, $item, $delimiter, $enclosure, $escape_char);
    }
    rewind($f);
    return stream_get_contents($f);
}

$list = array (
    array('aaa', 'bbb', 'ccc', 'ffffdd'),
    array('123', '456', '789'),
    array('"aaa"', '"bbb"')
);
var_dump(array2csv($list));

Answer 5

Since it's a CSV and not something like JSON, everything is going to be read as a string anyway so just convert your number to a string with:

• (string)$variable
• strval($variable) (which I would prefer here)
• concatenate with an empty string like $variable . ''

PHP's gettype() would also be an option. You can type cast every field to a string (even if it already is one) by using one of the methods I described or you can call out just the number field you're after by doing this:

if (gettype($field) == 'integer' || gettype($field) == 'double') {
    $field = strval($field); // Change $field to string if it's a numeric type
}

Here's the full code with it added

function arrayToCsv( array $fields, $delimiter = ';', $enclosure = '"', $encloseAll = false, $nullToMysqlNull = false ) {
    $delimiter_esc = preg_quote($delimiter, '/');
    $enclosure_esc = preg_quote($enclosure, '/');

    $outputString = "";
    foreach($fields as $tempFields) {
        $output = array();
        foreach ( $tempFields as $field ) {
            // ADDITIONS BEGIN HERE
            if (gettype($field) == 'integer' || gettype($field) == 'double') {
                $field = strval($field); // Change $field to string if it's a numeric type
            }
            // ADDITIONS END HERE
            if ($field === null && $nullToMysqlNull) {
                $output[] = 'NULL';
                continue;
            }

            // Enclose fields containing $delimiter, $enclosure or whitespace
            if ( $encloseAll || preg_match( "/(?:${delimiter_esc}|${enclosure_esc}|\s)/", $field ) ) {
                $field = $enclosure . str_replace($enclosure, $enclosure . $enclosure, $field) . $enclosure;
            }
            $output[] = $field." ";
        }
        $outputString .= implode( $delimiter, $output )."\r\n";
    }
    return $outputString; 
}

Answer 6

I'm using this function to convert php array to csv. It's working also for multidimensional array.

public function array_2_csv($array) {
$csv = array();
foreach ($array as $item=>$val) {
if (is_array($val)) { 
    $csv[] = $this->array_2_csv($val);
    $csv[] = "\n";
} else {
    $csv[] = $val;
  }
 }
return implode(';', $csv);
}