如何将一个新项目插入到数组的任何位置,例如在数组的中间?
当前回答
在做了几天之后,这是我能找到的最简单的解决方案。
$indexnumbertoaddat // this is a variable that points to the index # where you
want the new array to be inserted
$arrayToAdd = array(array('key' => $value, 'key' => $value)); //this is the new
array and it's values that you want to add. //the key here is to write it like
array(array('key' =>, since you're adding this array inside another array. This
is the point that a lot of answer left out.
array_splice($originalArray, $indexnumbertoaddatt, 0, $arrayToAdd); //the actual
splice function. You're doing it to $originalArray, at the index # you define,
0 means you're just shifting all other index items down 1, and then you add the
new array.
其他回答
你可以用这个
foreach ($array as $key => $value)
{
if($key==1)
{
$new_array[]=$other_array;
}
$new_array[]=$value;
}
通常,使用标量值:
$elements = array('foo', ...);
array_splice($array, $position, $length, $elements);
要在数组中插入一个数组元素,不要忘记将数组包装在数组中(因为它是一个标量值!):
$element = array('key1'=>'value1');
$elements = array($element);
array_splice($array, $position, $length, $elements);
否则,数组的所有键都将逐条添加。
function array_insert($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']);
杰伊的解决方案。李是完美的。如果要向多维数组中添加项,请先添加一个一维数组,然后再替换它。
$original = (
[0] => Array
(
[title] => Speed
[width] => 14
)
[1] => Array
(
[title] => Date
[width] => 18
)
[2] => Array
(
[title] => Pineapple
[width] => 30
)
)
将相同格式的项添加到此数组中将添加所有新的数组索引作为项,而不仅仅是项。
$new = array(
'title' => 'Time',
'width' => 10
);
array_splice($original,1,0,array('random_string')); // can be more items
$original[1] = $new; // replaced with actual item
注意:使用array_splice直接向多维数组添加项会将其所有索引作为项添加,而不仅仅是该项。
这样你就可以插入数组:
function array_insert(&$array, $value, $index)
{
return $array = array_merge(array_splice($array, max(0, $index - 1)), array($value), $array);
}