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我需要使用PHP 将CSV文件转换为服务器上的JSON.我正在使用这个有效的脚本:

function csvToJSON($csv) {
    $rows = explode("\n", $csv);

    $i = 0;
    $len = count($rows);
    $json = "{\n" . '    "data" : [';
    foreach ($rows as $row) {
        $cols = explode(',', $row);
        $json .= "\n        {\n";
        $json .= '            "var0" : "' . $cols[0] . "\",\n";
        $json .= '            "var1" : "' . $cols[1] . "\",\n";
        $json .= '            "var2" : "' . $cols[2] . "\",\n";
        $json .= '            "var3" : "' . $cols[3] . "\",\n"; …