将MySQL查询转换为CSV的PHP代码

在PHP中将MySQL查询转换为CSV的最有效方法是什么？

最好避免使用临时文件，因为这会降低可移植性（目录path和所需的文件系统权限设置）。

CSV还应包含一行字段名称。

Answer 1

SELECT * INTO OUTFILE "c:/mydata.csv" FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY "\n" FROM my_table; 

（ 这里的文档在这里： http : //dev.mysql.com/doc/refman/5.0/en/select.html ）

要么：

 $select = "SELECT * FROM table_name"; $export = mysql_query ( $select ) or die ( "Sql error : " . mysql_error( ) ); $fields = mysql_num_fields ( $export ); for ( $i = 0; $i < $fields; $i++ ) { $header .= mysql_field_name( $export , $i ) . "\t"; } while( $row = mysql_fetch_row( $export ) ) { $line = ''; foreach( $row as $value ) { if ( ( !isset( $value ) ) || ( $value == "" ) ) { $value = "\t"; } else { $value = str_replace( '"' , '""' , $value ); $value = '"' . $value . '"' . "\t"; } $line .= $value; } $data .= trim( $line ) . "\n"; } $data = str_replace( "\r" , "" , $data ); if ( $data == "" ) { $data = "\n(0) Records Found!\n"; } header("Content-type: application/octet-stream"); header("Content-Disposition: attachment; filename=your_desired_name.xls"); header("Pragma: no-cache"); header("Expires: 0"); print "$header\n$data"; 

Answer 2

看看这个问题/答案 。 它比@Geoff更简洁，并使用内置的fputcsv函数。

 $result = $db_con->query('SELECT * FROM `some_table`'); if (!$result) die('Couldn\'t fetch records'); $num_fields = mysql_num_fields($result); $headers = array(); for ($i = 0; $i < $num_fields; $i++) { $headers[] = mysql_field_name($result , $i); } $fp = fopen('php://output', 'w'); if ($fp && $result) { header('Content-Type: text/csv'); header('Content-Disposition: attachment; filename="export.csv"'); header('Pragma: no-cache'); header('Expires: 0'); fputcsv($fp, $headers); while ($row = $result->fetch_array(MYSQLI_NUM)) { fputcsv($fp, array_values($row)); } die; } 

Answer 3

查看关于SELECT … INTO OUTFILE语法的文档 。

 SELECT a,b,a+b INTO OUTFILE '/tmp/result.txt' FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n' FROM test_table; 

Answer 4

@jrgns的更新（有一些轻微的语法差异）解决scheme。

 $result = mysql_query('SELECT * FROM `some_table`'); if (!$result) die('Couldn\'t fetch records'); $num_fields = mysql_num_fields($result); $headers = array(); for ($i = 0; $i < $num_fields; $i++) { $headers[] = mysql_field_name($result , $i); } $fp = fopen('php://output', 'w'); if ($fp && $result) { header('Content-Type: text/csv'); header('Content-Disposition: attachment; filename="export.csv"'); header('Pragma: no-cache'); header('Expires: 0'); fputcsv($fp, $headers); while ($row = mysql_fetch_row($result)) { fputcsv($fp, array_values($row)); } die; } 

Answer 5

如果您希望将下载的内容作为可直接在Excel中打开的下载方式提供，则可能适用于您：（从我的旧未发布的项目中复制而来）

这些函数设置标题：

 function setExcelContentType() { if(headers_sent()) return false; header('Content-type: application/vnd.ms-excel'); return true; } function setDownloadAsHeader($filename) { if(headers_sent()) return false; header('Content-disposition: attachment; filename=' . $filename); return true; } 

这个使用mysql结果发送一个CSV到一个stream

 function csvFromResult($stream, $result, $showColumnHeaders = true) { if($showColumnHeaders) { $columnHeaders = array(); $nfields = mysql_num_fields($result); for($i = 0; $i < $nfields; $i++) { $field = mysql_fetch_field($result, $i); $columnHeaders[] = $field->name; } fputcsv($stream, $columnHeaders); } $nrows = 0; while($row = mysql_fetch_row($result)) { fputcsv($stream, $row); $nrows++; } return $nrows; } 

这个使用上面的函数来写一个C​​SV文件，由$ filename给出

 function csvFileFromResult($filename, $result, $showColumnHeaders = true) { $fp = fopen($filename, 'w'); $rc = csvFromResult($fp, $result, $showColumnHeaders); fclose($fp); return $rc; } 

这就是魔法发生的地方;）

 function csvToExcelDownloadFromResult($result, $showColumnHeaders = true, $asFilename = 'data.csv') { setExcelContentType(); setDownloadAsHeader($asFilename); return csvFileFromResult('php://output', $result, $showColumnHeaders); } 

例如：

 $result = mysql_query("SELECT foo, bar, shazbot FROM baz WHERE boo = 'foo'"); csvToExcelDownloadFromResult($result); 

Answer 6

 // Export to CSV if($_GET['action'] == 'export') { $rsSearchResults = mysql_query($sql, $db) or die(mysql_error()); $out = ''; $fields = mysql_list_fields('database','table',$db); $columns = mysql_num_fields($fields); // Put the name of all fields for ($i = 0; $i < $columns; $i++) { $l=mysql_field_name($fields, $i); $out .= '"'.$l.'",'; } $out .="\n"; // Add all values in the table while ($l = mysql_fetch_array($rsSearchResults)) { for ($i = 0; $i < $columns; $i++) { $out .='"'.$l["$i"].'",'; } $out .="\n"; } // Output to browser with appropriate mime type, you choose ;) header("Content-type: text/x-csv"); //header("Content-type: text/csv"); //header("Content-type: application/csv"); header("Content-Disposition: attachment; filename=search_results.csv"); echo $out; exit; }