How to group Loop by index in PHP - php

Question

I'm making a notification system (Let me know when you arrive) and I'm having trouble grouping by email. I need to group the products with specific emails to set up email sending.My problem is to separate the separate output by email
Array
$resultado = array(
array( 'email' => 'de#email.com' , 'ean' => '1278', 'desc' => 'PROD1' ),
array( 'email' => 'de#email.com' , 'ean' => '2342', 'desc' => 'PROD2' ),
array( 'email' => 'de#email.com' , 'ean' => '7567', 'desc' => 'PROD3' ),
array( 'email' => 'ma#email.com' , 'ean' => '5555', 'desc' => 'PROD4' ),
array( 'email' => 'ma#email.com' , 'ean' => '3335', 'desc' => 'PROD5' ),
);
Group
$saida = array();
foreach ($resultado as $res) {
if( !isset( $saida[$res['email']] ) ) {
$saida[$res['email']] = array();
}
array_push( $saida[$res['email']], $res['ean'], $res['desc'], $res['email']);
}
OUT
echo"<pre>";
print_r( $saida );
echo"</pre>";
Array
(
[de#email.com] => Array
(
[0] => 1278
[1] => PROD1
[2] => de#email.com
[3] => 2342
[4] => PROD2
[5] => de#email.com
[6] => 7567
[7] => PROD3
[8] => de#email.com
)
[ma#email.com] => Array
(
[0] => 5555
[1] => PROD4
[2] => ma#email.com
[3] => 3335
[4] => PROD5
[5] => ma#email.com
)
)
I NEED DISPLAY A BREAK LINE (Only when the email is different)
PROD1 - 1278 - de#email.com
PROD2 - 2342 - de#email.com
PROD3 - 7567 - de#email.com
___________________________________
PROD4 - 5555 - ma#email.com
PROD5 - 3335 - ma#email.com
And send emails
$return = sendEmail( TO, SITE, '$mails_HERE' , HOST, '[' . SITE . '] ' . $subject, $content);

Answer 1

Here you can first filter out the unique mails and then search the array for corresponding emails data.
$resultado = array(
array( 'email' => 'de#email.com' , 'ean' => '1278', 'desc' => 'PROD1' ),
array( 'email' => 'de#email.com' , 'ean' => '2342', 'desc' => 'PROD2' ),
array( 'email' => 'de#email.com' , 'ean' => '7567', 'desc' => 'PROD3' ),
array( 'email' => 'ma#email.com' , 'ean' => '5555', 'desc' => 'PROD4' ),
array( 'email' => 'ma#email.com' , 'ean' => '3335', 'desc' => 'PROD5' ),
);
$emails = array_unique(array_column( $resultado, 'email' ));
$grouped = [];
//looking for each email's corresponding data and saving it in group array
foreach ($emails as $key1 => $each ) {
foreach ($resultado as $value) {
if( $value['email'] === $each ){
unset($value['email']);
$grouped[$each][] = $value;
}
}
}
// printing the group data
foreach ($grouped as $key => $each_member ) {
foreach ($each_member as $value) {
echo"<pre>";
echo $value['desc'] . ' ' . $value['ean'] . ' ' . $key;
echo"</pre>";
}
echo '-------------------------';
}

Answer 2

you just need to group your items.
$results = array(
array( 'email' => 'de#email.com' , 'ean' => '1278', 'desc' => 'PROD1' ),
array( 'email' => 'de#email.com' , 'ean' => '2342', 'desc' => 'PROD2' ),
array( 'email' => 'de#email.com' , 'ean' => '7567', 'desc' => 'PROD3' ),
array( 'email' => 'ma#email.com' , 'ean' => '5555', 'desc' => 'PROD4' ),
array( 'email' => 'ma#email.com' , 'ean' => '3335', 'desc' => 'PROD5' )
);
$data = [];
foreach ($results as $result) {
$data[$result['email']][] = $result;
}
And that's it.