How to remove key value in php?

Given an associative array:

array["key1" => "value1", "key2" => "value2", ...]

How would I go about removing a certain key-value pair, given the key?

user229044♦

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asked Jun 16, 2010 at 13:14

0

You can use unset:

unset[$array['key-here']];

Example:

$array = array["key1" => "value1", "key2" => "value2"];
print_r[$array];

unset[$array['key1']];
print_r[$array];

unset[$array['key2']];
print_r[$array];

Output:

Array
[
    [key1] => value1
    [key2] => value2
]
Array
[
    [key2] => value2
]
Array
[
]

Pang

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answered Jun 16, 2010 at 13:15

SarfrazSarfraz

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3

Use this function to remove specific arrays of keys without modifying the original array:

function array_except[$array, $keys] {
  return array_diff_key[$array, array_flip[[array] $keys]];   
} 

First param pass all array, second param set array of keys to remove.

For example:

$array = [
    'color' => 'red', 
    'age' => '130', 
    'fixed' => true
];
$output = array_except[$array, ['color', 'fixed']];
// $output now contains ['age' => '130']

userlond

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answered Sep 1, 2015 at 10:56

BafiBafi

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3

Use unset[]:

unset[$array['key1']];

Pang

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answered Jun 16, 2010 at 13:15

cletuscletus

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0

Using unset:

unset[$array['key1']]

user229044♦

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answered Jun 16, 2010 at 13:15

CristianCristian

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Consider this array:

$arr = array["key1" => "value1", "key2" => "value2", "key3" => "value3", "key4" => "value4"];

• To remove an element using the array key:

  // To unset an element from array using Key:
  unset[$arr["key2"]];
  var_dump[$arr];
  // output: array[3] { ["key1"]=> string[6] "value1" ["key3"]=> string[6] "value3" ["key4"]=> string[6] "value4" }
  

• To remove element by value:

  // remove an element by value:
  $arr = array_diff[$arr, ["value1"]];
  var_dump[$arr];
  // output: array[2] { ["key3"]=> string[6] "value3" ["key4"]=> string[6] "value4" } 
  

read more about array_diff: //php.net/manual/en/function.array-diff.php

• To remove an element by using index:

  array_splice[$arr, 1, 1];
  var_dump[$arr];
  // array[1] { ["key3"]=> string[6] "value3" } 
  

read more about array_splice: //php.net/manual/en/function.array-splice.php

answered Apr 19, 2018 at 14:32

Sahith VibudhiSahith Vibudhi

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You may need two or more loops depending on your array:

$arr[$key1][$key2][$key3]=$value1; // ....etc

foreach [$arr as $key1 => $values] {
  foreach [$values as $key2 => $value] {
  unset[$arr[$key1][$key2]];
  }
}

answered Mar 6, 2015 at 5:28

0

you can do it using Laravel helpers:

first helper, method Arr::except:

$array = ['name' => 'Desk', 'price' => 100];

$filtered = Arr::except[$array, ['price']];

// ['name' => 'Desk']

second helper: method Arr::pull

$array = ['name' => 'Desk', 'price' => 100];

$name = Arr::pull[$array, 'name'];

// $name: Desk

// $array: ['price' => 100]

answered Mar 13, 2021 at 9:42

OMROMR

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