How to remove keys from php array [duplicate]

Question

My array is:

Array(
    2 => 'Title: Warmly little before cousin sussex entire set Blessing it ladyship.',
    3 => 'Snippet: Testing',
    4 => 'Category: Member',
    5 => 'Tags: little, before, entire',
)

I want to remove keys 2,3,4 and 5, so that it should become like this:

Array(
    'Title: Warmly little before cousin sussex entire set Blessing it ladyship.',
    'Snippet: Testing',
    'Category: Member',
    'Tags: little before entire',
)

My actual array is:

Is it possible,,please suggest

no you cannot remove the keys, arrays will always have a key — Kevin
– Kevin, Commented Sep 23, 2014 at 8:58
There is no reason why you would want to remove the keys of an array. What do you want to do? Maybe we can provide a good solution for your problem then. — xate
– xate, Commented Sep 23, 2014 at 9:04
An array is a collection of key/value pairs.... you can't remove a key without removing the value as well, unless you simply want a string instead: $myData = implode(",\n", $myArray); — Mark Baker
– Mark Baker, Commented Sep 23, 2014 at 9:04
Removing keys doesn't make any sense, that's the point of an array, otherwise how would you iterate it ? If what you want to get is Array ( Title: => Warmly...., Snippet: Testing, etc...) Then you should loop your strings, Explode them on ":" and create a new array with the first part of each of these strings as keys and the second part as values. — user4066167
– user4066167, Commented Sep 23, 2014 at 9:04
You don't need to remove the keys from the array. Just use it without them, for example: foreach ($myArray as $value){/*do anything you wish the $value, it's your array element without the key*/} — beerwin
– beerwin, Commented Sep 23, 2014 at 9:04

Pedro Amaral Couto · Accepted Answer · 2022-05-30 17:14:08Z

47

Although an array in PHP is "a type that associates values to keys" and some say it's not possible to remove the keys, you might, in a sense, remove the keys from an array either replacing the keys or replacing the array with another array.

I suppose you would like to change the array to an array equivalent to an array initialized without explicit keys. For instance, you might have this array:

$arr = array(2 => 'a', 3 => 'b', 4 => 'c');

But you'd like it to be equivalent to:

$arr = array('a', 'b', 'c');

It's possible to do it using the function "array_values", like this:

$arr = array_values($arr);

Notice, though, the array still has keys: 0, 1, 2, and 3.

It's important to note that the integer keys are not the same as the array indexes. For instance, this piece of code:

<?php
$arr = array(3 => '', 4 => '', 1 => '', 2 => '');
foreach($arr as $k => $v):
    echo "$k ";
endforeach;

will output:

3 4 1 2

The function "array_values" might be used to make sure the keys values and indexes are the same:

<?php
    $arr = array(3 => '', 4 => '', 1 => '', 2 => '');
    foreach(array_values($arr) as $k => $v):
        echo "$k ";
    endforeach;
    // outputs: 0, 1, 2, 3

I explained how to "remove" the keys, but you might want to implement a class for the topics, make an interface for topic contents (animations, images, etc.) and check the SPL data structures.

edited May 30, 2022 at 17:14

answered Sep 23, 2014 at 10:36

Pedro Amaral Couto

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2 Comments

kachnitel Over a year ago

@PedroAmaralCouto: Best answer to the question, though the indexes output by array_values will actually be 0,1,2,3 not 1,2,3,4.

Pedro Amaral Couto Over a year ago

@kachnitel, you're right. I started saying they would start with 0, but did that mistake in a comment.

웃웃웃웃웃 · Accepted Answer · 2014-09-23 09:11:49Z

0

Is it possible.? No its not possible.You cannot remove the keys from arrays.If you want a string like that then you can try with implode function in php like this.

<?php
$arr = array(
    2 => 'Title: Warmly little before cousin sussex entire set Blessing it ladyship.',
    3 => 'Snippet: Testing',
    4 => 'Category: Member',
    5 => 'Tags: little, before, entire'
);

echo implode(",\n", $arr);
?>

Which will produce an output like this

Title: Warmly little before cousin sussex entire set Blessing it ladyship.,Snippet: Testing,Category: Member,Tags: little, before, entire

You can check the documentation of implode here for more info.

edited Sep 23, 2014 at 9:11

answered Sep 23, 2014 at 9:04

웃웃웃웃웃

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1 Comment

beerwin Over a year ago

What happens, if one of the items contain a comma?

danmullen · Accepted Answer · 2014-09-23 09:26:35Z

0

No, arrays are a way of holding key/value pairs. If you just want to output each of those lines of text, iterate through the array using foreach.

answered Sep 23, 2014 at 9:26

danmullen

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Comments

Eric · Accepted Answer · 2021-09-26 17:32:48Z

0

A dirty method, if you want to just want to remove the keys, don't care about the particular order of things afterwards (or do want them sorted by the function) and just need things listed in an array starting at 0, then you can use sort() on the array.

I say dirty because this forces it to sort things as well as just removing the array keys and reassigning them, but it's any easy way to get it done on a small array.

answered Sep 26, 2021 at 17:32

Eric

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Comments

Andy C · Accepted Answer · 2014-09-23 09:10:48Z

-2

If you want to define the keys yourself, create an array using this method:

$myArray = array ("title" => "Warmly...", "snippet" => "Testing", "category" => "Member");

This will give you

Array ( [title] => Warmly... [snippet] => Testing [category] => Member )

answered Sep 23, 2014 at 9:10

Andy C

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