remove duplicates from the two array in php - php

Question

I have stuck to the following problem of removing the duplcation of array
$result=array(2) { [0]=> object(stdClass)#489 (5) { ["id"]=> string(2) "64" ["block_from_id"]=> string(3) "117" ["block_to_id"]=> string(3) "329" ["block_status"]=> string(1) "0" ["username"]=> string(5) "pppoo" } [1]=> object(stdClass)#490 (5) { ["id"]=> string(2) "65" ["block_from_id"]=> string(3) "117" ["block_to_id"]=> string(3) "590" ["block_status"]=> string(1) "0" ["username"]=> string(3) "Pet" } }
$customerlist= array(7) { [0]=> object(stdClass)#491 (5) { ["customer_name"]=> string(4) "User" ["profile_image"]=> string(47) "http://pet.huarisnaque.com/pet/upload/90113.png" ["jid"]=> string(18) "user128#canopus-pc" ["customer_id"]=> string(3) "128" ["phone"]=> string(10) "4784784784" } [1]=> object(stdClass)#494 (5) { ["customer_name"]=> string(6) "Khatru" ["profile_image"]=> string(46) "http://smartpetmanagement.com/upload/61694.png" ["jid"]=> string(20) "khatru321#canopus-pc" ["customer_id"]=> string(3) "321" ["phone"]=> string(10) "9686838386" } [2]=> object(stdClass)#495 (5) { ["customer_name"]=> string(5) "pppoo" ["profile_image"]=> string(46) "http://smartpetmanagement.com/upload/35210.png" ["jid"]=> string(17) "yyy329#canopus-pc" ["customer_id"]=> string(3) "329" ["phone"]=> string(10) "9525538835" } [3]=> object(stdClass)#496 (5) { ["customer_name"]=> string(7) "Xitxitx" ["profile_image"]=> NULL ["jid"]=> string(21) "xitxitx330#canopus-pc" ["customer_id"]=> string(3) "330" ["phone"]=> string(10) "6535383535" } [4]=> object(stdClass)#497 (5) { ["customer_name"]=> string(25) "The Following Document yf" ["profile_image"]=> string(46) "http://smartpetmanagement.com/upload/13712.png" ["jid"]=> string(39) "the following document yf589#canopus-pc" ["customer_id"]=> string(3) "589" ["phone"]=> string(10) "9535383535" } [5]=> object(stdClass)#498 (5) { ["customer_name"]=> string(3) "Pet" ["profile_image"]=> NULL ["jid"]=> string(17) "pet590#canopus-pc" ["customer_id"]=> string(3) "590" ["phone"]=> string(10) "6560530537" } [6]=> object(stdClass)#499 (5) { ["customer_name"]=> string(10) "Sanjay Pra" ["profile_image"]=> NULL ["jid"]=> string(24) "sanjay pra599#canopus-pc" ["customer_id"]=> string(3) "599" ["phone"]=> string(10) "2828282822" } }
there are two arrays,we need to remove duplicate records from the array containing two elements from result having elements from the customerlist.
here is my approach
for($i=0;$i<count($customerslist);$i++)
{
for($j=0;$j<count($result);$i++)
{
// if($result[$j]->block_to_id==$customerslist[$i]->customer_id)
{
unset($customerslist[$i]);
}
echo $result[$j]->block_to_id."<br/>";
}
}

Answer 1

You can unset the values after you find the indexes that has the duplicate. Because if you unset it inside the for loop of checking your duplicates it will produce this error because the size/count of the array changes and the index does not match anymore:
Notice: Undefined offset: 2
So my solution is you can put the matching indexes on another array then unset them on another for loop shown bellow:
$result=array(
array('id' => 64,
"block_from_id" => 117,
"block_to_id" => 329,
"block_status" => 0,
"username" => "pppoo"),
array("id"=> 65,
"block_from_id"=> 117,
"block_to_id"=> 590,
"block_status"=> 0,
"username"=> "Pet"
)
);
$customerlist= array(
array("customer_name" => "User" ,"profile_image" => "http://pet.huarisnaque.com/pet/upload/90113.png" ,"jid" => "user128#canopus-pc" ,"customer_id" => "128" ,"phone" => "4784784784"),
array("customer_name" => "Khatru" ,"profile_image" => "http://smartpetmanagement.com/upload/61694.png" ,"jid" => "khatru321#canopus-pc" ,"customer_id" => "321" ,"phone" => "9686838386"),
array("customer_name" => "pppoo" ,"profile_image" => "http://smartpetmanagement.com/upload/35210.png" ,"jid" => "yyy329#canopus-pc" ,"customer_id" => "329" ,"phone" => "9525538835"),
array("customer_name" => "Xitxitx" ,"profile_image " => NULL ,"jid" => "xitxitx330#canopus-pc" ,"customer_id" => "330" ,"phone" => "6535383535"),
array("customer_name" => "The Following Document yf" ,"profile_image" => "http://smartpetmanagement.com/upload/13712.png" ,"jid" => "the following document yf589#canopus-pc" ,"customer_id" => "589" ,"phone" => "9535383535"),
array("customer_name" => "Pet" ,"profile_image " => NULL ,"jid" => "pet590#canopus-pc" ,"customer_id" => "590" ,"phone" => "6560530537"),
array("customer_name" => "Sanjay Pra" ,"profile_image " => NULL ,"jid" => "sanjay pra599#canopus-pc" ,"customer_id" => "599" ,"phone" => "2828282822")
);
echo "Before:". sizeof($customerlist) ."<br>";
print_r($customerlist);
echo "<br>";
echo "<br>";
$match = array();
for ($i=0; $i < sizeof($result) ; $i++) {
for ($ii=0; $ii < sizeof($customerlist) ; $ii++) {
if ($result[$i]['block_to_id'] == $customerlist[$ii]['customer_id']) {
$match[] = $ii;
echo " Match INDEX on result $i == customerlist $ii<br>";
}
}
}
for ($i=0; $i < sizeof($match) ; $i++) {
$ii = $match[$i];
unset($customerlist[$ii]);
}
echo "<br>";
echo "After: ". sizeof($customerlist) ."<br>";
print_r($customerlist);
OUTPUT:
Before:7
Array ( [0] => Array ( [customer_name] => User [profile_image] => http://pet.huarisnaque.com/pet/upload/90113.png [jid] => user128#canopus-pc [customer_id] => 128 [phone] => 4784784784 ) [1] => Array ( [customer_name] => Khatru [profile_image] => http://smartpetmanagement.com/upload/61694.png [jid] => khatru321#canopus-pc [customer_id] => 321 [phone] => 9686838386 ) [2] => Array ( [customer_name] => pppoo [profile_image] => http://smartpetmanagement.com/upload/35210.png [jid] => yyy329#canopus-pc [customer_id] => 329 [phone] => 9525538835 ) [3] => Array ( [customer_name] => Xitxitx [profile_image ] => [jid] => xitxitx330#canopus-pc [customer_id] => 330 [phone] => 6535383535 ) [4] => Array ( [customer_name] => The Following Document yf [profile_image] => http://smartpetmanagement.com/upload/13712.png [jid] => the following document yf589#canopus-pc [customer_id] => 589 [phone] => 9535383535 ) [5] => Array ( [customer_name] => Pet [profile_image ] => [jid] => pet590#canopus-pc [customer_id] => 590 [phone] => 6560530537 ) [6] => Array ( [customer_name] => Sanjay Pra [profile_image ] => [jid] => sanjay pra599#canopus-pc [customer_id] => 599 [phone] => 2828282822 ) )
Match INDEX on result 0 == customerlist 2
Match INDEX on result 1 == customerlist 5
After: 5
Array ( [0] => Array ( [customer_name] => User [profile_image] => http://pet.huarisnaque.com/pet/upload/90113.png [jid] => user128#canopus-pc [customer_id] => 128 [phone] => 4784784784 ) [1] => Array ( [customer_name] => Khatru [profile_image] => http://smartpetmanagement.com/upload/61694.png [jid] => khatru321#canopus-pc [customer_id] => 321 [phone] => 9686838386 ) [3] => Array ( [customer_name] => Xitxitx [profile_image ] => [jid] => xitxitx330#canopus-pc [customer_id] => 330 [phone] => 6535383535 ) [4] => Array ( [customer_name] => The Following Document yf [profile_image] => http://smartpetmanagement.com/upload/13712.png [jid] => the following document yf589#canopus-pc [customer_id] => 589 [phone] => 9535383535 ) [6] => Array ( [customer_name] => Sanjay Pra [profile_image ] => [jid] => sanjay pra599#canopus-pc [customer_id] => 599 [phone] => 2828282822 ) )