如何从数组php中删除一个值

Question

Hello, I have this code and I want to correct it because it deletes all same value and I want to delete one value

            $rows = "944,1001,1001,3946";
            $sesto = explode(",",$rows);
            $arr = array_diff($sesto,array(1001));
            $comma_separated = implode(",", $arr);
            echo $comma_separated;

i want to be 944,1001,3946

Answer 1

You can use array_search to find the index of the first match and then use array_splice to remove it:

$rows = "944,1001,1001,3946";
$arr = explode(",",$rows);
array_splice($arr, array_search(1001, $arr), 1);
$comma_separated = implode(",", $arr);
echo $comma_separated;

Note that this assumes that the element exists in the array. If you try to delete an element that doesn't exist it will delete the first element instead. If you do not want that behaviour use this to make sure it found an element before deleting:

$rows = "944,1001,1001,3946";
$arr = explode(",",$rows);

$index = array_search(1001, $arr);
if ( $index !== false ) 
    array_splice($arr, $index, 1);

$comma_separated = implode(",", $arr);
echo $comma_separated;