Unset,array_splice in PHP removes the difference between elements in an array

If you want to delete an element in an array, you can use the unset directly, but the index of the array does not reflow:

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<?php $arr= array(‘a‘,‘b‘,‘c‘,‘d‘);unset($arr[1]);print_r($arr);?>

The result is:

Array ([0] = a [2] = c [3] = + D)

So how can the missing elements be filled and the array will be re-indexed? The answer is Array_splice ():

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<?php $arr= array(‘a‘,‘b‘,‘c‘,‘d‘); array_splice($arr,1,1); print_r($arr); ?>

The result is:

Array ([0] = a [1] = c [2] = + D)

Delete a specific element in an array

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<?php$arr2= array(1,3, 5,7,8);foreach ($arr2 as $key=>$value){  if ($value=== 3)    unset($arr2[$key]);}var_dump($arr2);?>

Supplemental Delete Empty Array

Instance:

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<?php  $array= (‘a‘ => "abc", ‘b‘ => "bcd",‘c‘ =>"cde",‘d‘ =>"def",‘e‘=>"");  array_filter($array);  echo"<pre>";  print_r($array);?>

Results:

Array (
[A] = ABC
[B] = BCD
[C] = CDE
[d] = def
)

Summarize

If the Array_splice () function is deleted, the index value of the array also changes.
If the unset () function is removed, the index value of the array does not change.

Unset,array_splice in PHP removes the difference between elements in an array