生成csv

csv表格的一种，so ，看需求吧，有的需求指定用csv

$csv = "";
foreach ($data as $row) {
//把数组元素组合为一个字符串： join() 函数是 implode() 函数的别名。
    $csv .= join(",", $row) . "n";
}
echo $csv;
 
<?php  
function toCSV(array $data, array $colHeaders = array(), $asString = false) {  
    $stream = ($asString)
        ? fopen("php://temp/maxmemory", "w+")
        : fopen("php://output", "w");  
 //头部
    if (!empty($colHeaders)) {
        fputcsv($stream, $colHeaders);  
    }
 //数据
    foreach ($data as $record) {
        fputcsv($stream, $record);
    }
 //作为字符串
    if ($asString) {
        rewind($stream);  
        $returnVal = stream_get_contents($stream);  
        fclose($stream);  
        return $returnVal;  
    }
    else {
        fclose($stream);  
    }  
}