It is very simple to delete an array element in PHP, but sometimes deleting an array requires some ordering of the index and we will use the relevant function, here we introduce the use of Unset,array_splice to delete the elements in the array of differences
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:
<? $arrarray(' A ', ' B ', ' C ', ' d '); unset ($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 ():
<? $arrarray(' A ', ' B ', ' C ', ' d 'array_splice($arr, Print_r ($arr?>
The result is:
Array ([0] = a [1] = c [2] = + D)
Delete a specific element in an array
<? PHP $arr 2 = array (1,3, 5,7,8 foreach ( $arr 2 as $ Key => $value ) {
Supplemental Delete Empty Array
Instance:
<? PHP $array = (' a ' + = ' abc ', ' B ' + = ' bcd ', ' c ' = ' CDE ', ' d ' and ' Def ', ' e ' = ' = ') '; Array_filter ($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.
(utility) Unset,array_splice the difference between deleting elements in an array in PHP