Remove Duplicate Arrays in PHP for laravel framework

Question

I have more than 4 arrays in single variable as shown below

$myArray = Array ( [0] => NA [1] => NA [2] => USA [3] => NA [4] => Texas )Array ( [0] => NA [1] => NA [2] => UK [3] => NA [4] => Texas  )Array ( [0] => NA [1] => NA [2] => USA [3] => NA [4] => Texas ) Array ( [0] => NA [1] => NA [2] => UAE [3] => NA [4] => Texas )

Now i need to compare each and every array of [2] index.

If second index ([2] => USA) is present in some other array then delete duplicate array.

Finally the arrays should look like this

Array ( [0] => NA [1] => NA [2] => USA [3] => NA [4] => Texas )Array ( [0] => NA [1] => NA [2] => UK [3] => NA [4] => Texas )Array ( [0] => NA [1] => NA [2] => UAE [3] => NA [4] => Texas ).

I have tried this but not able to sort it out.

$myArray = array_map("unserialize", array_unique(array_map("serialize", $myArray)));

Is there any way?

i have edited my question. Array looks like as edited, it does not contain any comma's to separate arrays — DPS
– DPS, Commented Nov 13, 2017 at 12:07
@DPS In php array elements are separated by commas, but when you use print_r to output an array, it only shows a dummy readable version of an array, which is not a valid syntax for PHP. In php, so you need to use var_export to output an executable array. Here is a demo with print_r and var_export see for your self. It is the same array but print_r removes the commas and quotations. — mega6382
– mega6382, Commented Nov 13, 2017 at 14:10

mega6382 · Accepted Answer · 2017-11-13 11:15:31Z

1

You can use a foreach loop for this, like DEMO:

$match = [];
foreach($myArray as $key => $value)
{
    if(!in_array($value[2], $match))
    {
        $match[] = $value[2];
        continue;
    }
    unset($myArray[$key]);
}

This will remove all of the arrays which have duplicate value for [2]

answered Nov 13, 2017 at 11:15

mega6382

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TheDevWay · Accepted Answer · 2017-11-13 11:19:37Z

0

You need to iterate through your array with two loops and check the second index value in each of the inner arrays and if there is a duplicated value you can just unset the second one.

Here is a piece of code that should do well:

<?php

for($i=0; $i < count($myArray); $i++) {
    for($j=$i+1; $j < count($myArray); $j++) {
        if ($myArray[$i][2] == $myArray[$j][2]) {
            unset($myArray[$j][2]);
        }
    }
}

P.S: The code is not tested and may need some modifications, but you could get the main idea.

edited Nov 13, 2017 at 11:19

answered Nov 13, 2017 at 11:15

TheDevWay

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