Php MongoDB Write a CSV File - php

Question

I have searched the internet, and could not get any specific details about it.
The environment is Windows 8, WAMP , MONGODB
I am trying to design a webpage, which have 4 fields: Name,Contact,Device,Email. After an user hits the submit button, the data inserts in the MongoDb. All this works fine.
The issue starts when I try to write the inserted data in the csv file, as this is the requirement. I have tried MongoDB Export command in the cmd, and it works fine, but trying to call the same using exec function in the php script is proving to be futile.
I have tried with this also, by storing the command in a .bat file, and then calling the .bat file using the php's exec function, still, no effect
<?php
echo '<pre>';
// Outputs all the result of shellcommand "ls", and returns
// the last output line into $last_line. Stores the return value
// of the shell command in $retval.
exec("c:\WINDOWS\system32\cmd.exe /c START C:\wamp\bin\mongodb\mongodb-win32-x86_64-2008plus-2.4.3\conf\export.bat");
?>
I have enabled the checbox interaction with desktop in my WAMP server.
I don't need any specific help related with the coding, all I need is some direction on how to proceed ahead, as I know that I am missing something. Also, I reiterate, did not get anything specific on the Internet, hence, posting the question.
Kindly let me know on how to achieve this.
Thanks to everyone

Answer 1

The following may work
header('Content-Type: application/csv');
header('Content-Disposition: attachment; filename=example.csv');
header('Pragma: no-cache');
$database = "DATABASE";
$colName = "COLLECTION";
$connection = new MongoClient();
$collection = $connection->$colName->$database;
$cursor = $collection->find();
foreach($cursor as $cur)
echo '"'.$cur['field_1'].'","'.$cur['field_2']."\"\n";

Answer 2

This code will dump your selected database to the a json file
$mongoExport = 'c:\mongodb\mongoexport'; //full path to mongoexport binary
$database = 'test';
$collection = 'foo';
$file = "c:\\temp\\foo.json"
exec(sprintf("%s -d %s -c %s -o %s",
$mongoExport,
$database,
$collection,
$file
));
And this is using pure PHP, for sure will be more fast the mongoexport option, with large collections:
$database = 'test';
$collection = 'foo';
$m = new MongoClient();
$col = $m->selectDB($database)->$collection;
$json = json_encode(iterator_to_array($col->find()));

Answer 3

set_time_limit(0);
ob_start();
error_reporting(E_ALL);
ini_set("display_errors",1);
$conn = new MongoClient("mongodb://Hostname:27017", array("replicaSet" => "rs0"));
if(!$conn){
die("Unable to connect with mongodb");
}
$db = $conn-><DB NAME>; // DB name
$col1 = $db-><colname>;
$col2 = $db-><colname>; // collection name which u want .
$filterCountry = array("status"=>"1"); // where query
$records = $col1->find($filterCountry);
$fp= fopen('exampleTest11.csv', 'w'); // open csv file in which u want write data.
$headings[] = "Code";
$headings[] = "Status" ;
$headings[] = "EMP CODE";
fputcsv($fp, $headings); // PUT Headings .
$cnt =0;
foreach($records as $val) {
$csvarr = array();
$csvarr['code']= $val['code']; // fetch data from database.
$csvarr['Status']= $val['status'];
$csvarr['emp_code']= $val['emp_code'];
fputcsv($fp, $csvarr);
$cnt++;
}
echo "Completed Successfully..".$cnt;