Remove duplicates in array - php

Question

Here is the code for storing unique values to a variable.
$filtermodel = array_unique($list2);
Output:
Array
(
[0] => 15592
[1] => 182
[4] => 14208
[7] => 183
[11] => 184,185,186
[15] => 174
[16] => 177
[23] => 184,186
[24] => 184,185,186,187
[29] => 179
[38] => 188
[41] => 174,176,184,185,186,187
)
Above array key[11] contains 184,185,186 and key[23][24] contains same as key[11]. How to remove those duplicates in array? Any help? Thanks in advance.

Answer 1

You can go with a foreach over each element in array and explode by comma , then do a unique on the resulted list of strings
Here is a Demo

Answer 2

If we suppose that the '182,186' for example is an array of integers and got right what you are trying to achieve the below works :
If not then please consider pointing out better what are you trying to achieve
$mArray = array(
15592,
182,
14208,
183,
array(184,185,186),
174,
177,
array(184,186),
array(184,185,186,187),
179,
188,
array(174,176,184,185,186,187),
);
$mFinalArray = [];
foreach($mArray as $currentObject)
if(!is_array($currentObject) && !in_array($currentObject, $mFinalArray))
$mFinalArray[] = $currentObject;
else if(is_array($currentObject))
foreach($currentObject as $currentObjectInside)
if(!in_array($currentObjectInside, $mFinalArray))
$mFinalArray[] = $currentObjectInside;
sort($mFinalArray);
print_r($mFinalArray);
Output :
Array
(
[0] => 174
[1] => 176
[2] => 177
[3] => 179
[4] => 182
[5] => 183
[6] => 184
[7] => 185
[8] => 186
[9] => 187
[10] => 188
[11] => 14208
[12] => 15592
)

Answer 3

You can use array_walk with passing by reference, using the third parameter (userdata) as dictionary for used values:
array_walk($array, function(&$item, $_, &$dict) {
$values = explode(',', $item);
$item = implode(',', array_filter($values, function ($value) use (&$dict) {
// If value already in the dictionary, just skip it.
if (isset($dict[$value])) {
return false;
}
// Add value to the dictionary and not filter it out.
return $dict[$value] = true;
}));
}, []);
Here is working demo.

Answer 4

Try using a foreach loop and for each row contains ',' symbol try using explode.
You can also create an array just for holding the existing values for later check if they exist.
Simple example-
$unique_values = [];
$all_values = array (
[0] => 15592
[1] => 182
[4] => 14208
[7] => 183
[11] => 184,185,186
[15] => 174
[16] => 177
[23] => 184,186
[24] => 184,185,186,187
[29] => 179
[38] => 188
[41] => 174,176,184,185,186,187
);
foreach( $all_values as $av ) {
if( strpos( $av, ',' ) !== false ) {
$av = explode( ',', $av );
foreach( $av as $a ) {
array_push( $unique_values, $a );
array_unique( $unique_values );
$result = !empty( array_intersect( $unique_values, $a ) );
}
}
}
I didn't test this code but i made it for explaining the logic.