function array_insert($array, $position, $insert) {
    if ($position > 0) {
        if ($position == 1) {
            array_unshift($array, array());
        } else {
            $position = $position - 1;
            array_splice($array, $position, 0, array(
                ''
            ));
        }
        $array[$position] = $insert;
    }

    return $array;
}

电话的例子:

$array = array_insert($array, 1, ['123', 'abc']);

你可以用这个

foreach ($array as $key => $value) 
{
    if($key==1)
    {
        $new_array[]=$other_array;
    }   
    $new_array[]=$value;    
}

$result_array = array();
$array = array("Tim","John","Mark");
$new_element = "Bill";
$position = 1; 

for ($i=0; $i<count($array); $i++)
    {
      if ($i==$position)
       {
          $result_array[] = $new_element;
       }
       $result_array[] = $array[$i];
    }

print_r($result_array); 

// Result will Array([0] => "Tim",[1] => "Bill", [2] => "John",[1] => "Mark")

$a = array(1, 2, 3, 4);
$b = array_merge(array_slice($a, 0, 2), array(5), array_slice($a, 2));
// $b = array(1, 2, 5, 3, 4)

要将元素插入到具有字符串键的数组中，您可以这样做:

/* insert an element after given array key
 * $src = array()  array to work with
 * $ins = array() to insert in key=>array format
 * $pos = key that $ins will be inserted after
 */ 
function array_insert_string_keys($src,$ins,$pos) {

    $counter=1;
    foreach($src as $key=>$s){
        if($key==$pos){
            break;
        }
        $counter++;
    } 

    $array_head = array_slice($src,0,$counter);
    $array_tail = array_slice($src,$counter);

    $src = array_merge($array_head, $ins);
    $src = array_merge($src, $array_tail);

    return($src); 
} 

基于@Halil的伟大回答，这里是一个简单的函数如何在特定的键后插入新元素， 同时保留整型键:

private function arrayInsertAfterKey($array, $afterKey, $key, $value){
    $pos   = array_search($afterKey, array_keys($array));

    return array_merge(
        array_slice($array, 0, $pos, $preserve_keys = true),
        array($key=>$value),
        array_slice($array, $pos, $preserve_keys = true)
    );
}