Here is an adaption of the above code that adds support for double quotes inside a field. (One double quote is replaced with a pair of double quotes per the CSV format).
<?php
 function fputcsv($filePointer,$dataArray,$delimiter,$enclosure)
 {
 // Write a line to a file
 // $filePointer = the file resource to write to
 // $dataArray = the data to write out
 // $delimeter = the field separator
 
 // Build the string
 $string = "";
 
 // No leading delimiter
 $writeDelimiter = FALSE;
 foreach($dataArray as $dataElement)
 {
 // Replaces a double quote with two double quotes
 $dataElement=str_replace("\"", "\"\"", $dataElement);
 
 // Adds a delimiter before each field (except the first)
 if($writeDelimiter) $string .= $delimiter;
 
 // Encloses each field with $enclosure and adds it to the string
 $string .= $enclosure . $dataElement . $enclosure;
 
 // Delimiters are used every time except the first.
 $writeDelimiter = TRUE;
 } // end foreach($dataArray as $dataElement)
 
 // Append new line
 $string .= "\n";
 
 // Write the string to the file
 fwrite($filePointer,$string);
 }
?>