Fetch row, explode and delete duplicates - PHP [duplicate] - php
How can I remove duplicate values from an array in PHP?
Use array_unique().
Example:
$array = array(1, 2, 2, 3);
$array = array_unique($array); // Array is now (1, 2, 3)
Use array_values(array_unique($array));
array_unique: for unique array
array_values: for reindexing
//Find duplicates
$arr = array(
'unique',
'duplicate',
'distinct',
'justone',
'three3',
'duplicate',
'three3',
'three3',
'onlyone'
);
$unique = array_unique($arr);
$dupes = array_diff_key( $arr, $unique );
// array( 5=>'duplicate', 6=>'three3' 7=>'three3' )
// count duplicates
array_count_values($dupes); // array( 'duplicate'=>1, 'three3'=>2 )
$result = array();
foreach ($array as $key => $value){
if(!in_array($value, $result))
$result[$key]=$value;
}
The only thing which worked for me is:
$array = array_unique($array, SORT_REGULAR);
Edit : SORT_REGULAR keeps the same order of the original array.
sometimes array_unique() is not the way,
if you want get unique AND duplicated items...
$unique=array("","A1","","A2","","A1","");
$duplicated=array();
foreach($unique as $k=>$v) {
if( ($kt=array_search($v,$unique))!==false and $k!=$kt )
{ unset($unique[$kt]); $duplicated[]=$v; }
}
sort($unique); // optional
sort($duplicated); // optional
results on
array ( 0 => '', 1 => 'A1', 2 => 'A2', ) /* $unique */
array ( 0 => '', 1 => '', 2 => '', 3 => 'A1', ) /* $duplicated */
We can easily use arrar_unique($array); to remove duplicate elements
But the problem in this method is that the index of the elements are not in order, will cause problems if used somewhere else later.
Use
$arr = array_unique($arr);
$arr = array_values($arr);
print_r($arr);
Or
$arr = array_flip($arr);
$arr = array_flip($arr);
$arr = array_values($arr);
print_r($arr);
The first flip , flips the key value pair thus combines the elements with similar key(that was originally the value).
2nd flip to revert all the key value pairs. Finally array_value() sets each value with key starting from 0.
Note: Not to be used in associative array with predefined key value pairs
$a = array(1, 2, 3, 4);
$b = array(1, 6, 5, 2, 9);
$c = array_merge($a, $b);
$unique = array_keys(array_flip($c));
print_r($unique);
We can create such type of array to use this last value will be updated into column or key value and we will get unique value from the array...
$array = array (1,3,4,2,1,7,4,9,7,5,9);
$data=array();
foreach($array as $value ){
$data[$value]= $value;
}
array_keys($data);
OR
array_values($data);
explode(",", implode(",", array_unique(explode(",", $YOUR_ARRAY))));
This will take care of key associations and serialize the keys for the resulting new array :-)
Depending on the size of your array, I have found
$array = array_values( array_flip( array_flip( $array ) ) );
can be faster than array_unique.
There can be multiple ways to do these, which are as follows
//first method
$filter = array_map("unserialize", array_unique(array_map("serialize", $arr)));
//second method
$array = array_unique($arr, SORT_REGULAR);
If you concern in performance and have simple array, use:
array_keys(array_flip($array));
It's many times faster than array_unique.
This example is just an alternative.
<?php
$numbers = [1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,65776567567,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1];
$unique_numbers = [];
foreach($numbers as $number)
{
if(!in_array($number,$unique_numbers)){
$unique_numbers[] = $number;
}
}
print(json_encode($unique_numbers)); //// Array is now 1,3,4,5,6,2,7, ....
That's a great way to do it. Might want to make sure its output is back an array again. Now you're only showing the last unique value.
Try this:
$arrDuplicate = array ("","",1,3,"",5);
foreach (array_unique($arrDuplicate) as $v){
if($v != "") { $arrRemoved[] = $v; }
}
print_r ($arrRemoved);
if (#!in_array($classified->category,$arr)){
$arr[] = $classified->category;
?>
<?php } endwhile; wp_reset_query(); ?>
first time check value in array and found same value ignore it
Remove duplicate values from an associative array in PHP.
$arrDup = Array ('0' => 'aaa-aaa' , 'SKU' => 'aaa-aaa' , '1' => '12/1/1' , 'date' => '12/1/1' , '2' => '1.15' , 'cost' => '1.15' );
foreach($arrDup as $k => $v){
if(!( isset ($hold[$v])))
$hold[$v]=1;
else
unset($arrDup[$k]);
}
Array ( [0] => aaa-aaa [1] => 12/1/1 [2] => 1.15 )
$arrDuplicate = array ("","",1,3,"",5);
foreach(array_unique($arrDuplicate) as $v){
if($v != "" ){$arrRemoved = $v; }}
print_r($arrRemoved);
try this short & sweet code -
$array = array (1,4,2,1,7,4,9,7,5,9);
$unique = array();
foreach($array as $v){
isset($k[$v]) || ($k[$v]=1) && $unique[] = $v;
}
var_dump($unique);
Output -
array(6) {
[0]=>
int(1)
[1]=>
int(4)
[2]=>
int(2)
[3]=>
int(7)
[4]=>
int(9)
[5]=>
int(5)
}
<?php
$arr1 = [1,1,2,3,4,5,6,3,1,3,5,3,20];
print_r(arr_unique($arr1));
function arr_unique($arr) {
sort($arr);
$curr = $arr[0];
$uni_arr[] = $arr[0];
for($i=0; $i<count($arr);$i++){
if($curr != $arr[$i]) {
$uni_arr[] = $arr[$i];
$curr = $arr[$i];
}
}
return $uni_arr;
}
Here I've created a second empty array and used for loop with the first array which is having duplicates. It will run as many time as the count of the first array. Then compared with the position of the array with the first array and matched that it has this item already or not by using in_array. If not then it'll add that item to second array with array_push.
$a = array(1,2,3,1,3,4,5);
$count = count($a);
$b = [];
for($i=0; $i<$count; $i++){
if(!in_array($a[$i], $b)){
array_push($b, $a[$i]);
}
}
print_r ($b);
It can be done through function I made three function duplicate returns the values which are duplicate in array.
Second function single return only those values which are single mean not repeated in array and third and full function return all values but not duplicated if any value is duplicated it convert it to single;
function duplicate($arr) {
$duplicate;
$count = array_count_values($arr);
foreach($arr as $key => $value) {
if ($count[$value] > 1) {
$duplicate[$value] = $value;
}
}
return $duplicate;
}
function single($arr) {
$single;
$count = array_count_values($arr);
foreach($arr as $key => $value) {
if ($count[$value] == 1) {
$single[$value] = $value;
}
}
return $single;
}
function full($arr, $arry) {
$full = $arr + $arry;
sort($full);
return $full;
}
An alternative for array_unique() function..
Using Brute force algorithm
//[1] This our array with duplicated items
$matches = ["jorge","melvin","chelsy","melvin","jorge","smith"];
//[2] Container for the new array without any duplicated items
$arr = [];
//[3] get the length of the duplicated array and set it to the var len to be use for for loop
$len = count($matches);
//[4] If matches array key($i) current loop Iteration is not available in
//[4] the array $arr then push the current iteration key value of the matches[$i]
//[4] to the array arr.
for($i=0;$i
if(array_search($matches[$i], $arr) === false){
array_push($arr,$matches[$i]);
}
}
//print the array $arr.
print_r($arr);
//Result: Array
(
[0] => jorge
[1] => melvin
[2] => chelsy
[3] => smith
)
<?php
$a=array("1"=>"302","2"=>"302","3"=>"276","4"=>"301","5"=>"302");
print_r(array_values(array_unique($a)));
?>//`output -> Array ( [0] => 302 [1] => 276 [2] => 301 )`
I have done this without using any function.
$arr = array("1", "2", "3", "4", "5", "4", "2", "1");
$len = count($arr);
for ($i = 0; $i < $len; $i++) {
$temp = $arr[$i];
$j = $i;
for ($k = 0; $k < $len; $k++) {
if ($k != $j) {
if ($temp == $arr[$k]) {
echo $temp."<br>";
$arr[$k]=" ";
}
}
}
}
for ($i = 0; $i < $len; $i++) {
echo $arr[$i] . " <br><br>";
}
$array = array("a" => "moon", "star", "b" => "moon", "star", "sky");
// Deleting the duplicate items
$result = array_unique($array);
print_r($result);
ref : Demo
Related
Getting the larger array
$arr1 = [1,2,3]; $arr2 = [1,2,3,4]; $arr3 = [1,2,3,4,5]; echo max( count($arr1), count($arr2), count($arr3) ); // returns 5 with max I do get the count, but don't know which array is larger. How do I get the larger array's reference ($arr3 in this case)?
You should use multidimensional array to store your all arrays then, loop through the multidimensional array and find your largest array,
$lgArraySize = 0; // used for comparing the size of array
$lgArray = array(); // used to store reference of largest array
foreach($arraylist as $array) {
if(count($array) > $largeArraySize) {
$lgArray = &$array;
$lgArraySize = count($array);
}
}
print_r($largeArray);
Here is the one liner code.(that you want)
function findMax( $row ){
return count($row);
}
$maxArrayPos = array_search(max( array_map("findMax", $multi )), array_map("findMax", $multi ));
print_r($multi[$maxArrayPos]);
You can make this as one liner.
It's better to use indexes for such arrays, so that traversal is easy.
You can get reference to the larger array as follows -
$arr;
$arr[0] = [6,2,1,12,32,11];
$arr[1] = [1,2,3,4];
$arr[2] = [1,2,3,4,4,4,1,1,1,1];
$count = -1;//will hold max count
$big;//larger array will be stored here
foreach ($arr as $key => $value) {
$curCount = count($arr[$key]);//curCount holds current array size
//checking for biggest array count
if($curCount>$count){
$count = $curCount;
$big = &$arr[$key];
}
}
var_dump($big);
Maybe the logic is too bulky though!
Is this what you need? $arr1 = [1,2,3]; $arr2 = [1,2,3,4]; $arr3 = [1,2,3,4,5]; $countmax = [ "arr1" => $arr1, "arr2" => $arr2, "arr3" => $arr3, ]; $value = max($countmax); print_r($value); Oputput: Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )
Try this :
function laregr(){
$numargs = func_num_args();
$large_array = array();
if($numargs){
$arg_list = func_get_args();
$max = 0;
foreach($arg_list as $arg){
if(is_array($arg)){
$big = count($arg);
if($big >= $max ){
$max = $big;
$large_array = $arg;
}
}
}
}
return $large_array;
}
$arr1 = [1,2,3,4,5,6];
$arr2 = [1,2,3,4,5];
$arr4 = [1,2,3,4, 5,6,7];
$max_array = laregr($arr1, $arr2, $arr4); // large($arr1, ...)
print_r($max_array);
You may like to store all arrays inside an array and would like to do a foreach I think.
function max_length($array) {
$max = 0;
foreach($array as $child) {
if(count($child) > $max) {
$max = count($child);
}
}
return $max;
}
check this why it is better approach .
How php array will move to one dimension from two dimensional array
Original array Array ( [1147183647] => 3 [2147483242] => 1 ) expected out put Array (1147183647,1147183647,1147183647,2147483242) how can i expand array key base on their value
slightly sexier than those using 2 loops is to use the built in array_fill function
<?php
$array = array(1147183647 => 3, 2147483242 => 1);
$new=array();
foreach ($array as $key=>$var){
$new= array_merge($new,array_fill(0,$var,$key));
}
print_r($new);
demo: http://codepad.viper-7.com/NTcDhC
Loop over each key value pair and add the key to the output array for the value number of repitions:
$output = array();
$arr = array(1147183647 => 3, 2147483242 => 1);
foreach($arr as $v => $rep) {
for($i = 0; $i < $rep; $i++) {
$output[] = $v;
}
}
Here is a simple snippet.
<?php
//initialize array
$array = array(
"1147183647" => 3, "2147483242" => 1
);
//new array to hold the values
$new =array();
foreach($array as $k=>$v){
//echo $k."-".$v."<br>";
for($i=0; $i<$v; $i++){
$new[] = $k;
}
}
//check the output
print_r($new);
?>
Try this.
$array = array(1147183647 => 3, 2147483242 => 1);
$result=array();
foreach ($array as $key=>$var){
$result= array_merge($result,array_fill(0,$var,$key));
}
var_dump($result);
Find all array keys that has same value
Is there a simpler way to get all array keys that has same value, when the value is unknown.
The problem with array_unique is that it returns the unique array and thus it doesn't find unique values.
That is, for example, from this array:
Array (
[a]=>1000
[b]=>1
[c]=>1000
)
I want to get this
Array (
[a]=>1000
[c]=>1000
)
Another way around this is, if I could find the lonely values, and then their keys, and then use array_diff
This is what I've got so far, looks awful:
$a = array( 'a' => 1000, 'b' => 1, 'c' => 1000 );
$b = array_flip( array_count_values( $a ) );
krsort( $b );
$final = array_keys( $a, array_shift( $b ) );
Update
Using Paulo Freites' answer as a code base, I could get it working pretty easily, maintainable and easy on eyes kind of way… by using the filtering as a static class method I can get the duplicate values from an array by just calling ClassName::get_duplicates($array_to_filter)
private static $counts = null;
private static function filter_duplicates ($value) {
return self::$counts[ $value ] > 1;
}
public static function get_duplicates ($array) {
self::$counts = array_count_values( $array );
return array_filter( $array, 'ClassName::filter_duplicates' );
}
Taking advantage of closures for a more straightforward solution:
$array = array('a' => 1000, 'b' => 1, 'c' => 1000);
$counts = array_count_values($array);
$filtered = array_filter($array, function ($value) use ($counts) {
return $counts[$value] > 1;
});
var_dump($filtered);
This gave me the following:
array(2) {
["a"]=>
int(1000)
["c"]=>
int(1000)
}
Demo: https://eval.in/67526
That's all! :)
Update: backward-compatible solution
$array = array('a' => 1000, 'b' => 1, 'c' => 1000);
$counts = array_count_values($array);
$filtered = array_filter($array, create_function('$value',
'global $counts; return $counts[$value] > 1;'));
var_dump($filtered);
Demo: https://eval.in/68255
Your implementation has a few issues.
1) If there are 2 of value 1000 and 2 of another value, the array_flip will lose one of the sets of values.
2) If there are more than two different values, the array_keys will only find the one value that occurs most.
3) If there are no duplicates, you will still bring back one of the values.
Something like this works always and will return all duplicate values:
<?php
//the array
$a = array( 'a' => 1000, 'b' => 1, 'c' => 1000 );
//count of values
$cnt = array_count_values($a);
//a new array
$newArray = array();
//loop over existing array
foreach($a as $k=>$v){
//if the count for this value is more than 1 (meaning value has a duplicate)
if($cnt[$v] > 1){
//add to the new array
$newArray[$k] = $v;
}
}
print_r($newArray);
http://codepad.viper-7.com/fal5Yz
If you want to get the duplicates in an array try this: array_unique(array_diff_assoc($array1, array_unique($array1))) I found this from: http://www.php.net/manual/en/function.array-unique.php#95203
at the moment I cant figure out another solution...
// target array
$your_array = array('a'=>1000, 'b'=>1, 'c'=>1000);
// function to do all the job
function get_duplicate_elements($array) {
$res = array();
$counts = array_count_values($array);
foreach ($counts as $id=>$count) {
if ($count > 1) {
$r = array();
$keys = array_keys($array, $id);
foreach ($keys as $k) $r[$k] = $id;
$res[] = $r;
}
}
return sizeof($res) > 0 ? $res : false;
}
// test it
print_r(get_duplicate_elements($your_array));
output:
Array
(
[0] => Array
(
[a] => 1000
[c] => 1000
)
)
example #2: - when you have different values multiplied
// target array
$your_array = array('a'=>1000, 'b'=>1, 'c'=>1000, 'd'=>500, 'e'=>1);
// output
print_r(get_duplicate_elements($your_array));
output:
Array
(
[0] => Array
(
[a] => 1000
[c] => 1000
)
[1] => Array
(
[b] => 1
[e] => 1
)
)
if function result has been assigned to $res variable $res[0] gets an array of all elements from original array with first value found more than once, $res[1] gets array of elements with another duplicated-value, etc... function returns false if nothing duplicate has been found in argument-array.
Try this
$a = array( 'a' => 1, 'b' => 1000, 'c' => 1000,'d'=>'duplicate','e'=>'duplicate','f'=>'ok','g'=>'ok' );
$b = array_map("unserialize", array_unique(array_map("serialize", $a)));
$c = array_diff_key($a, $b);
$array = array("1"=>"A","2"=>"A","3"=>"A","4"=>"B","5"=>"B","6"=>"B");
$val = array_unique(array_values($array));
foreach ($val As $v){
$dat[$v] = array_keys($array,$v);
}
print_r($dat);
Search an array and create an array from the results
I have an associated array in php of subjects with either 1 or 0 as the second value. e.g: ([maths] => 1, [science] => 0, [english] => 1) How can i create a new array of items that have a value of 1? i.e. (maths, english) Thanks
$output = array_filter($input, function($v) {
return $v == 1;
});
This should do the trick (but requires PHP 5.3) - see array_filter().
$results = array();
foreach($array as $k=>$v){
if($v == 1){
$results[] = $k;
}
}
If you can guarantee that values will only ever be 1 or 0, then you can do an array_diff() to pick up every value that isn't 0. $array = array( 'maths' => 1, 'science' => 0, 'english' => 1); $newArray = array_diff($array, array(0)); var_dump($newArray); EDIT or the corresponding array_intersect() method to match every value that is a 1: $newArray2 = array_intersect($array, array(1)); var_dump($newArray2); If you want the original keys to become the values in your new array, then just wrap the expression in an array_keys() function. e.g. $newArray2 = array_keys(array_intersect($array, array(1)));
$array2 = array()
foreach ( $array as $key=>$val ){
if($val == 1)
{
$array2[] = $key;
}
}
How to remove duplicate values from an array in PHP
How can I remove duplicate values from an array in PHP?
Use array_unique(). Example: $array = array(1, 2, 2, 3); $array = array_unique($array); // Array is now (1, 2, 3)
Use array_values(array_unique($array)); array_unique: for unique array array_values: for reindexing
//Find duplicates $arr = array( 'unique', 'duplicate', 'distinct', 'justone', 'three3', 'duplicate', 'three3', 'three3', 'onlyone' ); $unique = array_unique($arr); $dupes = array_diff_key( $arr, $unique ); // array( 5=>'duplicate', 6=>'three3' 7=>'three3' ) // count duplicates array_count_values($dupes); // array( 'duplicate'=>1, 'three3'=>2 )
$result = array();
foreach ($array as $key => $value){
if(!in_array($value, $result))
$result[$key]=$value;
}
The only thing which worked for me is: $array = array_unique($array, SORT_REGULAR); Edit : SORT_REGULAR keeps the same order of the original array.
sometimes array_unique() is not the way,
if you want get unique AND duplicated items...
$unique=array("","A1","","A2","","A1","");
$duplicated=array();
foreach($unique as $k=>$v) {
if( ($kt=array_search($v,$unique))!==false and $k!=$kt )
{ unset($unique[$kt]); $duplicated[]=$v; }
}
sort($unique); // optional
sort($duplicated); // optional
results on
array ( 0 => '', 1 => 'A1', 2 => 'A2', ) /* $unique */
array ( 0 => '', 1 => '', 2 => '', 3 => 'A1', ) /* $duplicated */
We can easily use arrar_unique($array); to remove duplicate elements But the problem in this method is that the index of the elements are not in order, will cause problems if used somewhere else later. Use $arr = array_unique($arr); $arr = array_values($arr); print_r($arr); Or $arr = array_flip($arr); $arr = array_flip($arr); $arr = array_values($arr); print_r($arr); The first flip , flips the key value pair thus combines the elements with similar key(that was originally the value). 2nd flip to revert all the key value pairs. Finally array_value() sets each value with key starting from 0. Note: Not to be used in associative array with predefined key value pairs
$a = array(1, 2, 3, 4); $b = array(1, 6, 5, 2, 9); $c = array_merge($a, $b); $unique = array_keys(array_flip($c)); print_r($unique);
We can create such type of array to use this last value will be updated into column or key value and we will get unique value from the array...
$array = array (1,3,4,2,1,7,4,9,7,5,9);
$data=array();
foreach($array as $value ){
$data[$value]= $value;
}
array_keys($data);
OR
array_values($data);
explode(",", implode(",", array_unique(explode(",", $YOUR_ARRAY))));
This will take care of key associations and serialize the keys for the resulting new array :-)
Depending on the size of your array, I have found $array = array_values( array_flip( array_flip( $array ) ) ); can be faster than array_unique.
There can be multiple ways to do these, which are as follows
//first method
$filter = array_map("unserialize", array_unique(array_map("serialize", $arr)));
//second method
$array = array_unique($arr, SORT_REGULAR);
If you concern in performance and have simple array, use: array_keys(array_flip($array)); It's many times faster than array_unique.
This example is just an alternative.
<?php
$numbers = [1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,65776567567,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1,1,3,4,5,6,2,5,7,1];
$unique_numbers = [];
foreach($numbers as $number)
{
if(!in_array($number,$unique_numbers)){
$unique_numbers[] = $number;
}
}
print(json_encode($unique_numbers)); //// Array is now 1,3,4,5,6,2,7, ....
That's a great way to do it. Might want to make sure its output is back an array again. Now you're only showing the last unique value.
Try this:
$arrDuplicate = array ("","",1,3,"",5);
foreach (array_unique($arrDuplicate) as $v){
if($v != "") { $arrRemoved[] = $v; }
}
print_r ($arrRemoved);
if (#!in_array($classified->category,$arr)){
$arr[] = $classified->category;
?>
<?php } endwhile; wp_reset_query(); ?>
first time check value in array and found same value ignore it
Remove duplicate values from an associative array in PHP.
$arrDup = Array ('0' => 'aaa-aaa' , 'SKU' => 'aaa-aaa' , '1' => '12/1/1' , 'date' => '12/1/1' , '2' => '1.15' , 'cost' => '1.15' );
foreach($arrDup as $k => $v){
if(!( isset ($hold[$v])))
$hold[$v]=1;
else
unset($arrDup[$k]);
}
Array ( [0] => aaa-aaa [1] => 12/1/1 [2] => 1.15 )
$arrDuplicate = array ("","",1,3,"",5);
foreach(array_unique($arrDuplicate) as $v){
if($v != "" ){$arrRemoved = $v; }}
print_r($arrRemoved);
try this short & sweet code -
$array = array (1,4,2,1,7,4,9,7,5,9);
$unique = array();
foreach($array as $v){
isset($k[$v]) || ($k[$v]=1) && $unique[] = $v;
}
var_dump($unique);
Output -
array(6) {
[0]=>
int(1)
[1]=>
int(4)
[2]=>
int(2)
[3]=>
int(7)
[4]=>
int(9)
[5]=>
int(5)
}
<?php
$arr1 = [1,1,2,3,4,5,6,3,1,3,5,3,20];
print_r(arr_unique($arr1));
function arr_unique($arr) {
sort($arr);
$curr = $arr[0];
$uni_arr[] = $arr[0];
for($i=0; $i<count($arr);$i++){
if($curr != $arr[$i]) {
$uni_arr[] = $arr[$i];
$curr = $arr[$i];
}
}
return $uni_arr;
}
Here I've created a second empty array and used for loop with the first array which is having duplicates. It will run as many time as the count of the first array. Then compared with the position of the array with the first array and matched that it has this item already or not by using in_array. If not then it'll add that item to second array with array_push.
$a = array(1,2,3,1,3,4,5);
$count = count($a);
$b = [];
for($i=0; $i<$count; $i++){
if(!in_array($a[$i], $b)){
array_push($b, $a[$i]);
}
}
print_r ($b);
It can be done through function I made three function duplicate returns the values which are duplicate in array.
Second function single return only those values which are single mean not repeated in array and third and full function return all values but not duplicated if any value is duplicated it convert it to single;
function duplicate($arr) {
$duplicate;
$count = array_count_values($arr);
foreach($arr as $key => $value) {
if ($count[$value] > 1) {
$duplicate[$value] = $value;
}
}
return $duplicate;
}
function single($arr) {
$single;
$count = array_count_values($arr);
foreach($arr as $key => $value) {
if ($count[$value] == 1) {
$single[$value] = $value;
}
}
return $single;
}
function full($arr, $arry) {
$full = $arr + $arry;
sort($full);
return $full;
}
As an alternative of array_unique() you may use php Set class $array = array(1, 2, 2, 3); $array = (new \Ds\Set($array))->toArray() ; // Array is now (1, 2, 3)
An alternative for array_unique() function..
Using Brute force algorithm
//[1] This our array with duplicated items
$matches = ["jorge","melvin","chelsy","melvin","jorge","smith"];
//[2] Container for the new array without any duplicated items
$arr = [];
//[3] get the length of the duplicated array and set it to the var len to be use for for loop
$len = count($matches);
//[4] If matches array key($i) current loop Iteration is not available in
//[4] the array $arr then push the current iteration key value of the matches[$i]
//[4] to the array arr.
for($i=0;$i
if(array_search($matches[$i], $arr) === false){
array_push($arr,$matches[$i]);
}
}
//print the array $arr.
print_r($arr);
//Result: Array
(
[0] => jorge
[1] => melvin
[2] => chelsy
[3] => smith
)
<?php
$a=array("1"=>"302","2"=>"302","3"=>"276","4"=>"301","5"=>"302");
print_r(array_values(array_unique($a)));
?>//`output -> Array ( [0] => 302 [1] => 276 [2] => 301 )`
I have done this without using any function.
$arr = array("1", "2", "3", "4", "5", "4", "2", "1");
$len = count($arr);
for ($i = 0; $i < $len; $i++) {
$temp = $arr[$i];
$j = $i;
for ($k = 0; $k < $len; $k++) {
if ($k != $j) {
if ($temp == $arr[$k]) {
echo $temp."<br>";
$arr[$k]=" ";
}
}
}
}
for ($i = 0; $i < $len; $i++) {
echo $arr[$i] . " <br><br>";
}
$array = array("a" => "moon", "star", "b" => "moon", "star", "sky");
// Deleting the duplicate items
$result = array_unique($array);
print_r($result);
ref : Demo