通过PHP导出为CSV
比方说，我有一个数据库….有没有一种方法可以通过PHP将数据库中的数据导出到CSV文件（以及文本文件[如果可能的话]）？
我个人使用这个功能来创建任何数组的CSV内容。
function array2csv(array &$array) { if (count($array) == 0) { return null; } ob_start(); $df = fopen("php://output", 'w'); fputcsv($df, array_keys(reset($array))); foreach ($array as $row) { fputcsv($df, $row); } fclose($df); return ob_get_clean(); } 然后你可以让你的用户使用类似下载这个文件：
function download_send_headers($filename) { // disable caching $now = gmdate("D, d MYH:i:s"); header("Expires: Tue, 03 Jul 2001 06:00:00 GMT"); header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate"); header("Last-Modified: {$now} GMT"); // force download header("Content-Type: application/force-download"); header("Content-Type: application/octet-stream"); header("Content-Type: application/download"); // disposition / encoding on response body header("Content-Disposition: attachment;filename={$filename}"); header("Content-Transfer-Encoding: binary"); }
用法示例：
download_send_headers("data_export_" . date("Ymd") . ".csv"); echo array2csv($array); die();
您可以使用此命令导出日期。
<?php $list = array ( array('aaa', 'bbb', 'ccc', 'dddd'), array('123', '456', '789'), array('"aaa"', '"bbb"') ); $fp = fopen('file.csv', 'w'); foreach ($list as $fields) { fputcsv($fp, $fields); } fclose($fp); ?>
首先，您必须将来自mysql服务器的数据加载到数组中
只是为了记录，连接waaaaaay比fputcsv更快（我的意思是它）甚至内implode ; 而文件的大小更小：
// The data from Eternal Oblivion is an object, always $values = (array) fetchDataFromEternalOblivion($userId, $limit = 1000); // ----- fputcsv (slow) // The code of @Alain Tiemblo is the best implementation ob_start(); $csv = fopen("php://output", 'w'); fputcsv($csv, array_keys(reset($values))); foreach ($values as $row) { fputcsv($csv, $row); } fclose($csv); return ob_get_clean(); // ----- implode (slow, but file size is smaller) $csv = implode(",", array_keys(reset($values))) . PHP_EOL; foreach ($values as $row) { $csv .= '"' . implode('","', $row) . '"' . PHP_EOL; } return $csv; // ----- concatenation (fast, file size is smaller) // We can use one implode for the headers =D $csv = implode(",", array_keys(reset($values))) . PHP_EOL; $i = 1; // This is less flexible, but we have more control over the formatting foreach ($values as $row) { $csv .= '"' . $row['id'] . '",'; $csv .= '"' . $row['name'] . '",'; $csv .= '"' . date('dm-Y', strtotime($row['date'])) . '",'; $csv .= '"' . ($row['pet_name'] ?: '-' ) . '",'; $csv .= PHP_EOL; } return $csv;
这是几个报告的优化结论，从10行到数千行。 这三个例子在1000行以下工作正常，但数据较大时失败。
我推荐使用parsecsv-for-php来解决任何嵌套的换行符和引号的问题。
预制的代码附在这里。 你可以通过复制和粘贴你的代码来使用它：
https://gist.github.com/umairidrees/8952054#file-php-save-db-table-as-csv
就像@ Dampes8N所说：
$result = mysql_query($sql,$conecction); $fp = fopen('file.csv', 'w'); while($row = mysql_fetch_assoc($result)){ fputcsv($fp, $row); } fclose($fp);
希望这可以帮助。
如果您在头文件中指定了文件的大小，那么可以使用超过100行，只需在自己的类中调用get（）方法即可
function setHeader($filename, $filesize) { // disable caching $now = gmdate("D, d MYH:i:s"); header("Expires: Tue, 01 Jan 2001 00:00:01 GMT"); header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate"); header("Last-Modified: {$now} GMT"); // force download header("Content-Type: application/force-download"); header("Content-Type: application/octet-stream"); header("Content-Type: application/download"); header('Content-Type: text/x-csv'); // disposition / encoding on response body if (isset($filename) && strlen($filename) > 0) header("Content-Disposition: attachment;filename={$filename}"); if (isset($filesize)) header("Content-Length: ".$filesize); header("Content-Transfer-Encoding: binary"); header("Connection: close"); } function getSql() { // return you own sql $sql = "SELECT id, date, params, value FROM sometable ORDER BY date;"; return $sql; } function getExportData() { $values = array(); $sql = $this->getSql(); if (strlen($sql) > 0) { $result = dbquery($sql); // opens the database and executes the sql ... make your own ;-) $fromDb = mysql_fetch_assoc($result); if ($fromDb !== false) { while ($fromDb) { $values[] = $fromDb; $fromDb = mysql_fetch_assoc($result); } } } return $values; } function get() { $values = $this->getExportData(); // values as array $csv = tmpfile(); $bFirstRowHeader = true; foreach ($values as $row) { if ($bFirstRowHeader) { fputcsv($csv, array_keys($row)); $bFirstRowHeader = false; } fputcsv($csv, array_values($row)); } rewind($csv); $filename = "export_".date("Ymd").".csv"; $fstat = fstat($csv); $this->setHeader($filename, $fstat['size']); fpassthru($csv); fclose($csv); }
