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Remove string from PHP array?

Is it possible to remove a string (see example below) from a PHP array without knowing the index?

Example:

array = array("string1", "开发者_如何学Gostring2", "string3", "string4", "string5");

I need to remove string3.


$index = array_search('string3',$array);
if($index !== FALSE){
    unset($array[$index]);
}

if you think your value will be in there more than once try using array_keys with a search value to get all of the indexes. You'll probably want to make sure

EDIT:

Note, that indexes remain unchanged when using unset. If this is an issue, there is a nice answer here that shows how to do this using array_splice.


This is probably not the fastest method, but it's a short and neat one line of code:

$array = array_diff($array, array("string3"))

or if you're using PHP >5.4.0 or higher:

$array = array_diff($array, ["string3"])


You can do this.

$arr = array("string1", "string2", "string3", "string4", "string5");
$new_arr=array();
foreach($arr as $value)
{
    if($value=="string3")
    {
        continue;
    }
    else
    {
        $new_arr[]=$value;
    }     
}
print_r($new_arr); 


Use a combination of array_search and array_splice.

function array_remove(&$array, $item){
  $index = array_search($item, $array);
  if($index === false)
    return false;
  array_splice($array, $index, 1);
  return true;
}


You can also try like this.

$array = ["string1", "string2", "string3", "string4", "string5"];
$key = array_search('string3',$array);
unset($array[$key]);


It sort of depends how big the array is likely to be, and there's multiple options.

If it's typically quite small, array_diff is likely the fastest consistent solution, as Jorge posted.

Another solution for slightly larger sets:

$data = array_flip($data);
unset($data[$item2remove]);
$data = array_flip($data);

But that's only good if you don't have duplicate items. Depending on your workload it might be advantageous to guarantee uniqueness of items too.

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