How to repeat same values in mongodb with PHP - php

Question

I'm trying to repeat N times an array with a FOR loop, but I've been stuck in the last array that contains more elements. This is my code so far:
function data() {
for ($i = 1 ; $i <= 50 ; $i++) {
$magnitud = array('nombre' => 'medidor');
for ($j = 1 ; $j <= 5 ; $j++) {
$magnitude['magnitude'.$i] = array('date' => $date, 'value' => mt_rand(1,200));;
}
}
return $magnitude;
}
for ($i = 1 ; $i <= 50 ; $i++) {
$center->insertOne(['meter' => 'meter'.$i, 'data' => data()]);
}
I need to repeat 5 times the values of the array that contains the date and a value.
array('date' => $date, 'value' => mt_rand(1,200));
Something like this:
Date: 05/03/2015
Value: 25
Date: 10/12/2012
Value: 45
Date: 15/06/2005
Value: 67
Date: 26/05/2009
Value: 78
.
.
.
I've tried it in many ways, but I haven't acieved. Someone who lend me a hand to how to repeat N times that array?
Just in case you haven't got any idea about my question, I attach this picture wich is what I get in Robo3T (Visual Manager)
EDIT: To explain myself better, this is the json that I'm trying to get.
"_id" : ObjectId("5ab0c29db57dce17e0002bc0"),
"meter" : "meter1",
"data" : {
"magnitude1" : {
"date" : "20/10/2015 21:57:05",
"value" : 192,
"date" : "13/12/2015 22:51:15",
"value" : 85,
"date" : "15/05/2016 05:21:06",
"value" : 65,
"date" : "28/06/2017 15:32:26",
"value" : 72,
"date" : "02/11/2017 18:15:34",
"value" : 12,
},
"magnitude2" : {
"date" : "15/12/2009 15:21:32",
"value" : 45,
"date" : "12/05/2013 16:45:07",
"value" : 96,
"date" : "21/02/2015 03:06:12",
"value" : 85,
"date" : "15/08/2015 14:05:22",
"value" : 78,
"date" : "05/01/2017 21:12:32",
"value" : 198,
},
.
.
.
}

Answer 1

I think you mean you want to have 5 sub arrays of the magnitude array, so do it like this
function data() {
for ($i = 1 ; $i <= 50 ; $i++) {
for ($j = 1 ; $j <= 5 ; $j++) {
$magnitude['magnitude'.$i][] = array('date' => $date, 'value' => mt_rand(1,200));;
}
}
return $magnitude;
}
Not the use of [] in this line $magnitude['magnitude'.$i][] which will create a new sub occurrence within $magnitude['magnitude'.$i] each time round the inner loop

Answer 2

It is happening because the values are always overwrited as the key is never changed in the second loop. You can simplify it like this:
function data()
{
$value = 0;
for ($i = 0; $i < 250 ; $i++) {
$value = $i % 5 === 0 ? mt_rand(1, 200) : $value;
$magnitude['magnitude' . ($i + 1)] = array('date' => $date, 'value' => $value);
}
return $magnitude;
}