PHP exports csv files: specify encoding export and csv file import and export classes-PHP Tutorial-php.cn

PHP exports csv files: specify encoding export and csv file import and export classes

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Release： 2016-07-25 08:51:24

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/*
* PHP code to export MySQL data to CSV
*
* Sends the result of a MySQL query as a CSV file for download
* Easy to convert to UTF-8.
*/
/*
* establish database connection
*/
$conn = mysql_connect('localhost', 'login', 'pass') or die(mysql_error());
mysql_select_db('database_name', $conn) or die(mysql_error($conn));
mysql_query("SET NAMES CP1252");
/*
* execute sql query
*/
$query = sprintf('SELECT field1,field2 FROM table_name');
$result = mysql_query($query, $conn) or die(mysql_error($conn));
/*
* send response headers to the browser
* following headers instruct the browser to treat the data as a csv file called export.csv
*/
header('Content-Type: text/csv; charset=cp1252');
header('Content-Disposition: attachment;filename=output.csv');
/*
* output header row (if atleast one row exists)
*/
$row = mysql_fetch_assoc($result);
if ($row) {
echocsv(array_keys($row));
}
/*
* output data rows (if atleast one row exists)
*/ 导出csv文件
while ($row) {
echocsv($row);
$row = mysql_fetch_assoc($result);
}
/*
* echo the input array as csv data maintaining consistency with most CSV implementations
* - uses double-quotes as enclosure when necessary
* - uses double double-quotes to escape double-quotes
* - uses CRLF as a line separator
*/
function echocsv($fields)
{
$separator = '';
foreach ($fields as $field) {
if (preg_match('/\r|\n|,|"/', $field)) {
$field = '"' . str_replace('"', '""', $field) . '"';
}
echo $separator . $field;
$separator = ',';
}
echo "rn";
}
?>

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2. PHP import and export csv file classes

php implements the import and export classes of csv files. Code:

/**
*CSV file processing class
*/
class Csv{
public $csv_array; //csv array data
public $csv_str; //csv file data
public function __construct($param_arr , $column){
$this->csv_array = $param_arr;
$this->path = $path;
$this->column = $column;
}
/**
* Export
**/
public function export(){
if(empty($this->csv_array) || empty($this->column)){
return false;
}
$param_arr = $this->csv_array;
unset ($this->csv_array);
$export_str = implode(',',$param_arr['nav'])."n";
unset($param_arr['nav']);
//Assemble data
foreach($param_arr as $k=>$v){
foreach($v as $k1=>$v1){
$export_str .= implode(',',$v1)."n";
}
}
//Export $export_str
header( "Cache-Control: public" );
header( "Pragma: public" );
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:attachment;filename=txxx.csv");
header('Content-Type:APPLICATION/OCTET-STREAM');
ob_start();
// $file_str= iconv("utf-8 ",'gbk',$export_str);
ob_end_clean();
echo $export_str;
}
/**
* Import
**/
public function import($path,$column = 3){
$flag = flase ;
$code = 0;
$msg = 'Unprocessed';
$filesize = 1; //1MB
$maxsize = $filesize * 1024 * 1024;
$max_column = 1000;
//Detect whether the file exists
if($flag === flase){
if(!file_exists($path)){
$msg = 'File does not exist';
$flag = true;
}
}
//Detect file format
if ($flag === flase){
$ext = preg_replace("/.*.([^.]+)/","$1",$path);
if($ext != 'csv'){
$msg = 'Only CSV format files can be imported';
$flag = true;
}
}
//Detect file size
if($flag === flase){
if(filesize($path)> $maxsize){
$msg = 'The imported file must not exceed'.$maxsize.'B file';
$flag = true;
}
}
//Read the file
if($flag == flase){
$row = 0;
$handle = fopen($path,'r');
$dataArray = array();
while($data = fgetcsv($handle,$max_column,",")){
$ num = count($data);
if($num < $column){
$msg = 'The file does not meet the specifications and actually contains: '.$num.' column data';
$flag = true;
break;
}
if($flag === flase){
for($i=0;$i<3;$i++){
if($row == 0){
break;
}
//Build data
$dataArray[$row][$i] = $data[$i];
}
}
$row++;
}
}
return $dataArray;
}
}
$param_arr = array(
'nav' =>array('username','password','email'),
array(0=>array('xiaohai1','123456','xiaohai1@jbxue.com'),
1=> array('xiaohai2','213456','xiaohai2@jbxue.com'),
2=>array('xiaohai3','123456','xiaohai3@jbxue.com')
));
$column = 3;
$csv = new Csv($param_arr, $column);
//$csv->export();
$path = 'C:Documents and SettingsAdministratorTemptxxx.csv';
$import_arr = $csv-> ;import($path,3);
var_dump($import_arr);
?>

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