使用key删除索引数组中的数组元素

If I have a value '28' and I want to search through an array for the index that contains that value and remove it. Is there a way without running a for loop through each element in the array?

In this case I would want to remove the element $terms[7] or 6 => 28

$needle = 28;
$terms = array(
  0 =>  42
  1 =>  26
  2 =>  27
  3 =>  43
  4 =>  21
  5 =>  45
  6 =>  28
  7 =>  29
  8 =>  30
  9 =>  31
  10 =>  46
);

if (false !== array_search('28', $terms)) {
      unset($terms[array_search('28', $terms)]);
}

You can use array_keys to find all indexs of the needle.

array_keys

<?php
    $needle = 28;
    $haystack = [42, 26, 27, 43, 21, 45, 28, 29, 30, 31, 28, 46];
    $results = array_keys($haystack, $needle, true);
    while (!empty($results)) {
      unset($haystack[array_shift($results)]);
    }

As mentioned above, use array_search() to find the item. Then, use unset() to remove it from the array.

$haystack = [42, 28, 27, 45];
$needle = 28;

$index = array_search($needle, $haystack);

if ($index !== false) {
    unset($haystack[$index]);
} else {
    // $needle not present in the $haystack
}