Remove specific element by value from an array in PHP?

Description: Write a PHP program to remove a specific element, by its value, from an array.

Rules and hints:

• Take an array with the names of some months.
• Take a variable with the value that you want to remove.
• You can use array functions or a foreach loop.

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Solution 1: array_search() and unset()

array_search() finds the key of the value, and unset() removes that key. The other keys are not changed.

<?php
$months = ["January", "February", "March", "April", "May"];
$remove = "March";

$key = array_search($remove, $months);

if ($key !== false) {
    unset($months[$key]);
}

print_r($months);
?>

Output:

Solution 2: array_diff()

array_diff() removes all matching values (also if the value is many times in the array). Use array_values() to get new keys 0, 1, 2…

<?php
$months = ["January", "February", "March", "April", "May"];
$remove = "March";

$months = array_values(array_diff($months, [$remove]));

echo implode(", ", $months);
?>

Output:

Solution 3: array_filter()

<?php
$months = ["January", "February", "March", "April", "May"];
$remove = "March";

$months = array_filter($months, fn($month) => $month !== $remove);

echo implode(", ", $months);
?>

Output:

Note that solution 1 removes only the first match, but solutions 2 and 3 remove every match.

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