Removing non-unique JSON object from file using PHP [duplicate] - php

Question

I need one help.I have some JSON type data and i want to remove the duplicate set of data using PHP.I am explaining my code below.
data=[
{'member_name':member1,'no_of_users':20},
{'member_name':member1,'no_of_users':20},
{'member_name':member1,'no_of_users':20},
{'member_name':member2,'no_of_users':10},
{'member_name':member2,'no_of_users':10},
{'member_name':member3,'no_of_users':30},
]
my php side code is given below.
$res[]=array('member_name'=>$member,'no_of_members'=>$rowno['cnt']);
$result=var_dump( array_unique( $res, SORT_REGULAR ) );
//$result = json_decode($array, TRUE );
print json_encode($result);
Here we can see many duplicate data available.I need to remove only the duplicate data from this JSON object using PHP.Please help me.

Answer 1

First json_decode the JSON string, so we can work with it in PHP. Then you should use array_unique with the flag SORT_REGULAR to remove all duplicates and lastly json_encodeit again to a JSON string. Here's a working example:
$data = '[
{"member_name":"member1","no_of_users":20},
{"member_name":"member1","no_of_users":20},
{"member_name":"member1","no_of_users":20},
{"member_name":"member2","no_of_users":10},
{"member_name":"member2","no_of_users":10},
{"member_name":"member3","no_of_users":30}
]';
// Make a PHP array from the JSON string.
$array = json_decode( $data, TRUE );
// Only keep unique values, by using array_unique with SORT_REGULAR as flag.
// We're using array_values here, to only retrieve the values and not the keys.
// This way json_encode will give us a nicely formatted JSON string later on.
$array = array_values( array_unique( $array, SORT_REGULAR ) );
// Make a JSON string from the array.
$result = json_encode( $array );
Edit:
Based on your edit in your question:
Don't assign $result to a var_dump. Replace $result=var_dump( array_unique( $res, SORT_REGULAR ) ); by $result=array_unique( $res, SORT_REGULAR );

Answer 2

I was faced with the same challenge, so I came up with this simple solution.
<?php
//UniqueValues.php
class UniqueValues{
#The data Array
private $dataArray;
/*
The index you want to get unique values.
It can be the named index or the integer index.
In our case it is "member_name"
*/
private $indexToFilter;
public function __construct($dataArray, $indexToFilter){
$this->dataArray = $dataArray;
$this->indexToFilter = $indexToFilter;
}
private function getUnique(){
foreach($this->dataArray as $key =>$value){
$id[$value[$this->indexToFilter]]=$key;
}
return array_keys(array_flip(array_unique($id,SORT_REGULAR)));
}
public function getFiltered(){
$array = $this->getUnique();
$i=0;
foreach($array as $key =>$value){
$newAr[$i]=$this->dataArray[$value];
$i++;
}
return $newAr;
}
}
?>
include the class in your invocation code and that's all
<?php
//index.php
include_once('UniqueValues.php');
#Your JSON data
$data = '[
{"member_name":"member1","no_of_users":20},
{"member_name":"member1","no_of_users":20},
{"member_name":"member1","no_of_users":20},
{"member_name":"member2","no_of_users":10},
{"member_name":"member2","no_of_users":10},
{"member_name":"member3","no_of_users":30}
]';
#Convert your JSON to Array
$array = json_decode( $data, TRUE );
/*
Create an object by passing the "Two Dimension Array" in this case "$array" and
the "index" in this case "member_name" that you want to get the Unique Values
*/
$supper = new UniqueValues($array,"member_name");
/*
Get the unique valued array by calling the getFiltered() function
and encode it to JSON
*/
$result = json_encode( $supper->getFiltered() );
#Let the World See it :)
echo $result;
?>

Answer 3

Here, how can I solve this. See with example. make json unique
code part:
<?php
$depositeArray = array( 'deposite'=>array(
array('email'=>"sajib#gmail.com", 'deposite'=>0),
array('email'=>"avi#gmail.com", 'deposite'=>0),
array('email'=>"iqbal#gmail.com", 'deposite'=>0),
array('email'=>"balla#gmail.com", 'deposite'=>0),
array('email'=>"sajib#gmail.com", 'deposite'=>0),
array('email'=>"razib#gmail.com", 'deposite'=>0)
),
'total'=>0);
$depositeArray = json_encode($depositeArray);
$depositeArray = json_decode($depositeArray,true);
$depositeArrayNew = Json_Super_Unique($depositeArray['deposite'],'email');
$depositeArray['deposite'] = $depositeArrayNew ;
echo json_encode($depositeArray);
function Json_Super_Unique($array,$key){
$temp_array = array();
foreach ($array as &$v) {
if (!isset($temp_array[$v[$key]]))
$temp_array[$v[$key]] =& $v;
}
$array = array_values($temp_array);
return $array;
}
?>