How To Remove Specific Elements from Array in PHP

In this tutorial, you will learn how to remove or delete specific elements from php array by key, value, and index in PHP.

How to Delete Specific Elements from an Array By Key, Value and Index in PHP?

Here are some methods:

• Removing an array element by key
• Removing an array element by value
• Removing an array element by index
• Unset Multiple Keys from Array

Removing an array element by key

To remove an array element by key, you need to know the key of the element you want to remove.

Here’s an example:

<?php
$fruits = array("apple" => "red", "banana" => "yellow", "grape" => "purple");

unset($fruits["banana"]);

print_r($fruits);
?>

Removing an array element by value

To remove an array element by value, you need to search for the value and get its key. Then you can remove it from array by it’s value.

Here’s an example:

<?php
$fruits = array("apple", "papaya", "grape");

$key = array_search("papaya", $fruits);
if ($key !== false) {
  unset($fruits[$key]);
}

print_r($fruits);
?>

Removing an array element by index

To remove an array element by index, you need to know the index of the element, which you want to remove.

Here’s an example:

<?php
$fruits = array("apple", "banana", "grape");

unset($fruits[1]);

print_r($fruits);
?>

Unset Multiple Keys from Array

Sometimes, you may need to remove multiple elements from an array. So, you can use a loop to iterate through the array and call unset() on each key you want to remove.

Here’s an example:

$fruits = array(
    "apple" => 0.50,
    "banana" => 0.25,
    "cherry" => 1.00,
    "grape" => 0.75,
    "orange" => 0.30
);
$keys_to_remove = array("banana", "orange");

foreach ($keys_to_remove as $key) {
    if (array_key_exists($key, $fruits)) {
        unset($fruits[$key]);
    }
}

After running this code, the $fruits the array will look like this:

Array
(
    [apple] => 0.5
    [cherry] => 1
    [grape] => 0.75
)

Conclusion

The unset() a function is used to remove array elements by key, value, and index.

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