MySQLi将结果集转换为CSV或JSON

Posted 2021-02-26

function convertResult($rs, $type, $jsonmain="") {
	// receive a recordset and convert it to csv
	// or to json based on "type" parameter.
	$jsonArray = array();
	$csvString = "";
	$csvcolumns = "";
	$count = 0;
	while($r = $rs->fetch_row()) {
		for($k = 0; $k < count($r); $k++) {
			$rs->field_seek($k);
			$finfo = $rs->fetch_field();
			$jsonArray[$count][$finfo->name] = $r[$k];
			$csvString.=","".$r[$k].""";
			if (!$count) $csvcolumns.=($csvcolumns?",":"").$finfo->name;
		}
		$csvString.="
";
		$count++;
	}
	$jsondata = "{"$jsonmain":".json_encode($jsonArray)."}";
	$csvdata = str_replace("
,","
",$csvcolumns."
".$csvString);
	return ($type=="csv"?$csvdata:$jsondata);
}