Export mysql data in CSV in CakePHP - php

Question

In CakePHP, with the following code i am trying to Export users email in CSV.
I am getting Errors.
Code Refrence site
Error:
Notice (8): Undefined offset: 0 [APP\View\Frontusers\admin_exportemails.ctp, line 12]
Warning (2): fputcsv() expects parameter 2 to be array, null given [APP\View\Helper\CsvHelper.php, line 36]
Notice (8): Undefined offset: 1 [APP\View\Frontusers\admin_exportemails.ctp, line 12]
Warning (2): fputcsv() expects parameter 2 to be array, null given [APP\View\Helper\CsvHelper.php, line 36]
admin_exportemails.ctp
$line= $useremails[0]['Frontuser'];
$this->CSV->addRow(array_keys($line));
foreach ($useremails as $key => $useremail)
{
$line =$useremail[$key]['Frontuser'];
$this->CSV->addRow($line);
}
$filename='useremails';
echo $this->CSV->render($filename);

Answer 1

You're messing up your foreach. You split it up in the $key and the $useremail sub-array, which is OK. But then you iterate over it and try to access $useremail[$key]['Frontuser'] again, which is nonexistent at that point.
foreach ($useremails as $key => $useremail)
This causes the [0] and [1] in the original $useremails array to be set as $key, but you iterate over all the items over the $useremails, so you can simply:
$line = $useremail['Frontuser'];
You don't need the $key, since that's not part of the iterated item, e.g. the first time your foreach runs, it sees this:
[Frontuser] => Array
(
[name] => Rash
[email] => rash.com
)
And on the second iteration it sees this:
[Frontuser] => Array
(
[name] => John
[email] => john#gmail.com
)
So there is no [0] or [1] index anymore.

Answer 2

$useremail[$key]['Frontuser'];
should be
$useremail['Frontuser'];
Actually there's no need for your code to include the key in the foreach loop at all.
That's PHP 101, so for further information please refer to the manual: http://php.net/foreach

Answer 3

You can simply pass your data array in that function and your csv generated in webroot folder.
Note:- 1. You should put blank csv file at webroot folder.
2. you should store all information in a sub array which contain only values not Model index.
function generate_csv($data_array=array()){
// pr($data_array);die;
foreach ($data_array as $key => $value) {
$newdata[] = $key.','.$value;
}
// pr($newdata);die;
$f = fopen(APP.'webroot/csv_file.csv', 'w+');
foreach ($newdata as $line) {
fputcsv($f, array($line), ',');
}
fseek($f, 0);
fclose($f);
}

Answer 4

you made mistake in the for loop and iterated it in wrong way.just ommit the below line from the foreach loop.
$line =$useremail[$key]['Frontuser'];

Answer 5

Here have tow options
1. save csv file in folder not sent output to browser and
2. send output to browser
function generate_csv($data_array = array()) {
//$f = fopen(APP . 'webroot/files/unsaved_bars.csv', 'w+'); // for save csv file in folder not sent output to browser
$f = fopen("php://output", "a"); // for send output to browser
$headers[] = array('id','name','other_info'); // for header row
$data_array = array_merge($headers, $data_array);
foreach ($data_array as $line) {
fputcsv($f, $line, ',');
}
//fseek($f, 0);
fclose($f);
}