Collect duplicate data in array using php - php

Question

this is my sample array data from bio-metrics
I just want to collect data that has the same bio_id and date
temp:[
0:{
bio_id:"1"
date:"2017-10-05"
date_time:"2017-10-05 08:00:22"
device_name:"biometrics"
time:"08:00:22"
}
1:{
bio_id:"1"
date:"2017-10-05"
date_time:"2017-10-05 08:00:23"
device_name:"biometrics"
time:"08:00:23"
}
2:{
bio_id:"2"
date:"2017-10-05"
date_time:"2017-10-05 08:06:29"
device_name:"biometrics"
time:"08:06:29"
}
3:{
bio_id:"1"
date:"2017-10-05"
date_time:"2017-10-05 15:06:47"
device_name:"biometrics"
time:"15:06:47"
}
4:{
bio_id:"2"
date:"2017-10-05"
date_time:"2017-10-05 16:01:50"
device_name:"biometrics"
time:"16:01:50"
}
]
I been stuck with this code that I made, and don't know how I should manipulate it, or how I will store it properly, I have try some array function but it gives different result to my data
$len = count($temp);
for ($i=0; $i <$len ; $i++) {
$id = $temp[$i]['bio_id'];
$date = $temp[$i]['date'];
for ($x=0; $x < $len; $x++) {
if ($id == $temp[$x]['bio_id'] && $date == $temp[$x]['date']) {
$data[] = $temp[$x];
$int[] = $x;
}
}
}
I don't know how I should manipulate it, or how I will store it properly, I have try some array function but it gives different result to my data

Answer 1

This code will work to collect duplicate in the array on the basis of id and date
$newTemp = array();
foreach($temp as $value){
$newTemp[$value['id'].'_'.$value['date']][] = $value;
}

Answer 2

$newTemp = array();
for($temp as $value){
$key = $value->id." ".$value->date;
if(isset($newTemp[$key])){
$newTemp[$key] = array_merge($newTemp[$key],$value);
}else{
$newTemp[$key] = $value;
}
}

Answer 3

I just want to collect data that has the same bio_id and date
The easiest way is to iterate over the input array and aggregate the data into a new array, indexed by key generated using the bio_id and date fields. This way, a duplicate entry can be easily identified because the key already exists in the output array.
$input = array(/* the big input array here */);
// Build the output here
$output = array();
foreach ($input as $item) {
$key = $item['bio_id'].':'.$item['date'];
if (array_key_exists($key, $output)) {
// This is a duplicate
// Ignore the data, update only the count
$output[$key]['count'] ++;
} else {
// This is the first time this combination is processed
// Copy the input
$output[$key] = $item;
// Keep in 'count' how many times this combination exists in the input
$output[$key]['count'] = 1;
}
}
Each entry of $output is the first entry of $input that has the same combination of bio_id and date. Additional, the value of count is the number of entries of $input that share that pair of bio_id and date.
Work on this example if you need to aggregate the data in a different way (keep all duplicates, instead of their number, f.e.).
Another example that keeps the duplicates:
// Build the output here
$output = array();
foreach ($input as $item) {
$key = $item['bio_id'].':'.$item['date'];
if (array_key_exists($key, $output)) {
// This is a duplicate; add it to the list
$output[$key]['all'][] = $item;
} else {
// This is the first time this combination is processed
// Copy important values (bio_id and date) from the input
$output[$key] = array(
'bio_id' => $item['bio_id'],
'date' => $item['date'],
// Store the entire $item into a list
'all' => array($item),
);
}
}
Read about PHP arrays how to access their elements using the square brackets syntax and how to create or modify their values.