How to find a value in an array and remove it by using PHP array functions?

Just in case you want to use any of mentioned codes, be aware that array_search returns FALSE when the "needle" is not found in "haystack" and therefore these samples would unset the first (zero-indexed) item. Use this instead:

<?php
$haystack = Array('one', 'two', 'three');
if (($key = array_search('four', $haystack)) !== FALSE) {
  unset($haystack[$key]);
}
var_dump($haystack);

The above example will output:

Array
(
    [0] => one
    [1] => two
    [2] => three
)

And that's good!

<?php
$my_array = array('sheldon', 'leonard', 'howard', 'penny');
$to_remove = array('howard');
$result = array_diff($my_array, $to_remove);
?>

You need to find the key of the array first, this can be done using array_search()

Once done, use the unset()

<?php
$array = array( 'apple', 'orange', 'pear' );

unset( $array[array_search( 'orange', $array )] );
?>

To search an element in an array, you can use array_search function and to remove an element from an array you can use unset function. Ex:

<?php
$hackers = array ('Alan Kay', 'Peter Norvig', 'Linus Trovalds', 'Larry Page');

print_r($hackers);

// Search
$pos = array_search('Linus Trovalds', $hackers);

// array_seearch returns false if an element is not found
// so we need to do a strict check here to make sure
if ($pos !== false) {
    echo 'Linus Trovalds found at: ' . $pos;

    // Remove from array
    unset($hackers[$pos]);
}

print_r($hackers);

You can refer: https://www.php.net/manual/en/ref.array.php for more array related functions.