Php array delete all keys

Removing all keys from an array php

i need to filter array by «id» and when similar records found i need to evaluate by «status»key to remove number that’s 0 or less than «status» in matching row. Question: Is there a way to remove the keys in an array, and just get a plain array.

Removing all keys from an array php

Is there a way to remove the keys in an array, and just get a plain array.

Like change the code above to:

So removing the keys from the array, while only keeping the values.

If you wish to print the array so that it doesn’t include the keys you can use this function:

function toPlainArray($arr) < $output = "["; foreach($arr as $val) < $output .= $val .", "; >return substr($output, 0, -2) . "]"; > 

The function goes through each value and appends it to the output string, thus formatting it so that it looks like an array, but is really a string.

Php — delete all values from an array while keeping keys, The reasoning behind setting an array item to null is that an array needs to have a value for each key, otherwise a key makes no sense. That is why it is called a key — it is used to access a value. A null value seems like a reasonable choice here.

PHP array — remove elements with keys that start with

Newbie question — I’m trying to remove elements with keys that start with ‘not__’. Its inside laravel project so I (can) use its array functions. I’m trying to remove elements after the loop. This doesn’t remove anything, i.e. it doesn’t work:

function fixinput($arrinput) < $keystoremove = array(); foreach ($arrinput as $key =>$value); < if (starts_with($key, 'not__')) < $keystoremove = array_add($keystoremove, '', $key); >> $arrinput = array_except($arrinput, $keystoremove); return $arrinput; > 

Note that it won’t be the only task on array. I’ll try that myself. 🙂

$filtered = array(); foreach ($array as $key => $value) < if (strpos($key, 'not__') !== 0) < $filtered[$key] = $value; >> 

Using the array_filter function with the ARRAY_FILTER_USE_KEY flag looks to be the best/fastest option.

$arrinput = array_filter( $arrinput, function($key)< return strpos($key, 'not__') !== 0; >, ARRAY_FILTER_USE_KEY ); 

The flag parameters weren’t added until version 5.6.0 so for older versions of PHP a for loop would probably be the quickest option.

foreach ($arrinput as $key => $value) < if(strpos($key, 'not__') === 0) < unset($arrinput[$key]); >> 

I would assume the following method is a lot slower but its just a different way of doing it.

$allowed_keys = array_filter( array_keys( $arrinput ), function($key) < return strpos($key, 'not__') !== 0; >); $arrinput = array_intersect_key($arrinput , array_flip( $allowed_keys )); 

if(!function_exists('array_remove_keys_beginning_with'))< function array_remove_keys_beginning_with( $array, $str ) < if(defined('ARRAY_FILTER_USE_KEY'))< return array_filter( $array, function($key) use ($str) < return strpos($key, $str) !== 0; >, ARRAY_FILTER_USE_KEY ); > foreach ($array as $key => $value) < if(strpos($key, $str) === 0) < unset($array[ $key ]); >> return $array; > > 

$array = array('not__foo' => 'some_data', 'bar' => 'some_data', 12 => 'some_data', 15 => 'some_data', 'not__taz' => 'some_data', 'hello' => 'some_data', 'not__world' => 'some_data', 'yeah' => 'some_data'); // Some data $keys = array_keys($array); // Get the keys $filter = preg_grep('#^not__#', $keys); // Get the keys starting with not__ $output = array_diff_key($array, array_flip($filter)); // Filter it print_r($output); // Output 

Array ( [bar] => some_data [12] => some_data [15] => some_data [hello] => some_data [yeah] => some_data ) 

function fixinput($arrinput) < $keystoremove = array(); foreach ($arrinput as $key =>$value); < if (preg_match("@^not__@",$key)) < $keystoremove = array_add($keystoremove, '', $key); >> $arrinput = array_except($arrinput, $keystoremove); return $arrinput; > 

PHP Recursively unset array keys if match, I have the following array that I need to recursively loop through and remove any child arrays that have the key ‘fields’. I have tried array filter but I am having trouble getting any of it to wor

How to remove duplicate keys in array

I have an array called $myarray —

id position status name 4 23 4 john 3 45 3 mike 4 23 0 john 7 25 2 sam 

i need to filter array by «id» and when similar records found i need to evaluate by «status»key to remove number that’s 0 or less than «status» in matching row. Is there some way to do it fast like some function?

You could use array_multisort(..) to sort by id ASC then status DESC. Then you could walk through the sorted array and delete rows where the id has been seen before.

This removes all occurences of status=0 . If u want to keep these rows, when there is no other matching id , remove the $value[‘status’] > 0 &&

$cleanarray = array(); foreach ($myarray as $value) < if ( $value['status'] >0 && ( !array_key_exists($value['id'], $cleanarray) || $value['status'] > $cleanarray[$value['id']]['status'] ) ) $new_cleanarray[$value['id']] = $value; > 

This might be of your use

How do I remove specific keys from Array? PHP, Wanted to note that while the accepted answer works there’s a built in PHP function that handles this called array_filter.For this particular example it’d be something like:

Unset range of keys in an array

How can i unset a range of keys between say 70 to 80 in an array like this?

[63] => Computer Science and Informatics [64] => Dentistry [65] => Development Studies [66] => Drama, Dance and Performing Arts [67] => Earth Systems and Environmental Sciences [68] => Economics and Econometrics [69] => Education [70] => Electrical and Electronic Engineering [71] => English Language and Literature [72] => Epidemiology and Public Health [73] => European Studies [74] => French [75] => General Engineering and Mineral & Mining Engineering [76] => Geography and Environmental Studies [77] => Geography and Environmental Studies [78] => German, Dutch and Scandinavian Languages [79] => Health Services Research [80] => History [81] => History of Art, Architecture and Design [82] => Iberian and Latin American Languages [83] => Infection and Immunology [84] => Italian [85] => Law [86] => Library and Information Management [87] => Linguistics [88] => Mechanical, Aeronautical and Manufacturing Engineering [89] => Metallurgy and Materials [90] => Middle Eastern and African Studies 

$return = array_slice($original, 0, 60) 

$return = $return+array_slice($original, 70) 

$return = array_splice($original, 60, 10) 

There isn’t really a shortcut to this:

Sorting the array with Custom Key in PHP, Sorting the array with Custom Key in PHP. Ask Question Asked 7 years ago. Now i want to sort this one with php sort function, i mean sort the first array with second one to looks like the desired output something like below PHP array delete by value (not key) 2075. How can I add new array elements at the beginning of an …

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How to Remove Multiple Keys from PHP Array?

In this example, we will remove array elements by keys array in php. we can delete multiple keys from array php. basically we will unset multiple keys from php array.

if you see in php documentation there are not available directly remove multiple keys from php array. But we will create our own php custom function and remove all keys by given array value.

In this example i created custom function as array_except(). you need to pass one main array and another will be keys array that you want to remove it.

So let’s see bellow example:

$myArray = [

‘name’=>’Hardik Savani’,

’email’=>’savanihd@gmail.com’,

‘gender’=>’male’,

‘website’=>’itsolutionstuff.com’

];

$newArray = array_except($myArray, [‘gender’, ’email’]);

print_r($newArray);

function array_except($array, $keys) foreach($keys as $key) unset($array[$key]);

>

return $array;

>

?>

Array

(

[name] => Hardik Savani [website] => itsolutionstuff.com

)

Hardik Savani

I’m a full-stack developer, entrepreneur and owner of Aatman Infotech. I live in India and I love to write tutorials and tips that can help to other artisan. I am a big fan of PHP, Laravel, Angular, Vue, Node, Javascript, JQuery, Codeigniter and Bootstrap from the early stage. I believe in Hardworking and Consistency.

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Remove key and value from an associative array in PHP

To remove a key and its respective value from an associative array in PHP you can use the unset() function.

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; unset($mascots['Gopher']); print_r($mascots); // Array // ( // [ElePHPant] => php // [Geeko] => openSUSE // ) 

As the name of the function suggests, you use the unset() function to unset a given variable or in this case an array key with its value.

Remove multiple keys from associative array

Removing multiple keys from associative array can be done using the unset() as well. You can pass as many keys to unset as arguments to the unset() function. See the example below where two keys are dropped from the associative array.

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; unset($mascots['Gopher'], $mascots['Geeko']); print_r($mascots); // Array // ( // [ElePHPant] => php // ) 

However useful, the approach above might get somewhat tedious when you need to remove multiple keys from the associative array. In that case there is another option, the array_diff() function. The array_diff() function compares the array you pass it as its first argument and returns an array with the values not present in the array you pass it in the second array.

In contrast to the other options I present here this approach require you to specify the values for which you remove the keys (and values). Instead of keys for which you wish to remove the values (and keys).

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; $values = array_diff($mascots, ['openSUSE', 'Go']); print_r($values); // Array // ( // [ElePHPant] => php // ) 

This last approach seems especially convenient if you need to remove the keys (and values) dynamically in your code.

Remove all keys from associative array

To remove all keys from an associative PHP array is to basically turn the array into a regular numerically indexed array. This can be achieved by grabbing just the values from the associative PHP array.

Since associative arrays in PHP are ordered, just like numerically indexed arrays, we can grab just the values and maintain the original order of the array.

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; $values = array_values($mascots); print_r($values); // Array // ( // [0] => php // [1] => openSUSE // [2] => Go // ) 

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Remove key and value from an associative array in PHP

To remove a key and its respective value from an associative array in PHP you can use the unset() function.

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; unset($mascots['Gopher']); print_r($mascots); // Array // ( // [ElePHPant] => php // [Geeko] => openSUSE // ) 

As the name of the function suggests, you use the unset() function to unset a given variable or in this case an array key with its value.

Remove multiple keys from associative array

Removing multiple keys from associative array can be done using the unset() as well. You can pass as many keys to unset as arguments to the unset() function. See the example below where two keys are dropped from the associative array.

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; unset($mascots['Gopher'], $mascots['Geeko']); print_r($mascots); // Array // ( // [ElePHPant] => php // ) 

However useful, the approach above might get somewhat tedious when you need to remove multiple keys from the associative array. In that case there is another option, the array_diff() function. The array_diff() function compares the array you pass it as its first argument and returns an array with the values not present in the array you pass it in the second array.

In contrast to the other options I present here this approach require you to specify the values for which you remove the keys (and values). Instead of keys for which you wish to remove the values (and keys).

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; $values = array_diff($mascots, ['openSUSE', 'Go']); print_r($values); // Array // ( // [ElePHPant] => php // ) 

This last approach seems especially convenient if you need to remove the keys (and values) dynamically in your code.

Remove all keys from associative array

To remove all keys from an associative PHP array is to basically turn the array into a regular numerically indexed array. This can be achieved by grabbing just the values from the associative PHP array.

Since associative arrays in PHP are ordered, just like numerically indexed arrays, we can grab just the values and maintain the original order of the array.

<?php $mascots = [ 'ElePHPant' => 'php', 'Geeko' => 'openSUSE', 'Gopher' => 'Go' ]; $values = array_values($mascots); print_r($values); // Array // ( // [0] => php // [1] => openSUSE // [2] => Go // ) 

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