generate a csv using a single function

csv_generator.php

<?php

/**
 * @var array[]
 * @var string
 * @var string
 */
function csv($aCsv, $sDelimiter = ',', $sLineBreak = "\n")
{
	return implode($sLineBreak, array_map(
		function ($aLine) use ($sDelimiter) {
			$aLine = array_map(function ($s) {
				$s = str_replace('"', '', $s); // replace all double quotes

				if (preg_match("/[a-zA-Z]/", $s)) { // check letters in the string
					return "\"{$s}\""; // quote the line
				}

				return $s;
			}, $aLine);

			return str_replace(["\r\n", "\n"], '', implode($sDelimiter, $aLine)); // replace all line ends
		},
		$aCsv
	));
}