fill an array with non repeat key values php

Question

I´m facing this issue, probably this is dumb... but here we go:

I have a regular foreach:

 foreach $values as $values => $key {
   $test[] = $key;
 }

of course test is defined outside the loop.

Now, this returns something like this:

 array(6) {
 [0]=> int(10)
 [1]=> int(16)
 [2]=> int(10)
 [3]=> int(16)
 [4]=> int(10)
 [5]=> int(16)
 [6]=> int(10)
 }

However, I need the repeated values to be ignored so test would be like this:

 array(2) {
 [0]=> int(10)
 [1]=> int(16)
 }

And new values are only added if and only if, it is not repeated. I already tried array_unique and array_values however I'm not use If I am implementing them bad or what is the issue...

Any help will be appreciated.

Best Regards.

What was wrong when using array_unique? Also see in_array. — Jim
– Jim, Commented Apr 29, 2014 at 13:45
You're overriding $values in your loop, after the loop $values becomes the last element in the array, not the array itself. — billyonecan
– billyonecan, Commented Apr 29, 2014 at 13:52
Is it just me or is foreach $values as $values => $key the worst possible var names ever? — Digital Chris
– Digital Chris, Commented Apr 29, 2014 at 13:54

Community · Accepted Answer · 2023-11-17 20:42:18Z

2

If you only want to add the value if it doesn't exist, use in_array()

 $test=array();
    // organize the array by cusip
    foreach ($values as $values => $key) { 
            if(!in_array($key, $test)){
            $test[]=$value;
            }    
    }

edited Nov 17, 2023 at 20:42

CommunityBot

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answered Apr 29, 2014 at 13:48

Naruto

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Comments

user1978142 · Accepted Answer · 2014-04-29 13:45:17Z

1

Why not use array_unique()?

Consider this an example:

$values = array_unique($values);

or if you do not want to use array_unique(), you can do it in another way:

foreach ($values as $index => $element) {
    if(!in_array($element, $values)) {
        $test[] = $element;
    } 
}

answered Apr 29, 2014 at 13:45

user1978142

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1 Comment

andresmijares Over a year ago

yeah but for some reason this returns null on the key values

Дамян Станчев · Accepted Answer · 2014-04-29 13:46:07Z

1

How about assigning the array using array_unique:

<?php
    $x = array
    (
        0 => 'int(10)',
        1 => 'int(16)',
        2 => 'int(10)',
        3 => 'int(16)',
        4 => 'int(10)',
        5 => 'int(16)',
        6 => 'int(10)'
    );

    $x = array_unique($x);
    print_r($x);
?>

This will output

Array
(
    [0] => int(10)
    [1] => int(16)
)

answered Apr 29, 2014 at 13:46

Дамян Станчев

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1 Comment

andresmijares Over a year ago

now this worked, thanks a ton, it made the trick, i knew it was something silly, i was applying array_unique into the foreach to the $w.

GreyRoofPigeon · Accepted Answer · 2014-04-29 13:48:50Z

1

If array_unique somehow won't work for you, you could use:

<?php
foreach( $values as $values => $key ){
   if( !in_array($key, $test) )
      $test[] = $key;
}
?>

answered Apr 29, 2014 at 13:48

GreyRoofPigeon

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Comments

Eswara Reddy · Accepted Answer · 2014-04-29 14:11:02Z

0

Here your array is

$test = array(6) {
 [0]=> int(10)
 [1]=> int(16)
 [2]=> int(10)
 [3]=> int(16)
 [4]=> int(10)
 [5]=> int(16)
 [6]=> int(10)
 }

You can use array_unique($test) which will removes duplicate values.

edited Apr 29, 2014 at 14:11

answered Apr 29, 2014 at 13:46

Eswara Reddy

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1 Comment

2rs2ts Over a year ago

Could you add some explanation and maybe an example? As it stands this answer is too short.

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