To remove an entry from an array, we can use the unset () function: / p>
<?php
$arr = array(1, 2);
unset($arr[0]);
var_dump($arr);
/*
Resultado:
array(1) {
[1]=>
int(2)
}
*/
?>
How to remove an entry from an array by its value instead of its position?
Using the example above, we would pass the value 1 instead of the 0 position.
To remove an item from the array by passing the value, the function array_search () , solve. It retries the key if the value is found in the array and then just pass the index to unset() . This function does not reorder the array.
$arr = array(1,2,3,4,5,6);
echo'<pre>ANTES';
print_r($arr);
$key = array_search(4, $arr);
unset($arr[$key]);
echo'<pre>DEPOIS';
print_r($arr);
output:
ANTESArray
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
)
DEPOISArray
(
[0] => 1
[1] => 2
[2] => 3
[4] => 5
[5] => 6
)
I was able to think of two ways to do this:
array_search and array_values
As already replied by @perdeu the function array_search() solves the problem of finding the value.
However, I'd like to add that the array_values function resolves the issue of reindexing, that is, it returns the original array values indexed from scratch.
See an example:
$array = array(1, 2, 3, 4);
$pos = array_search(2, $array); //buscar posição do segundo elemento
unset($array[$pos]); //remover elemento
$array = array_values($array); //recriar índice
The final output will be:
array(3) {
[0]=> int(1)
[1]=> int(3)
[2]=> int(4)
}
See a working example here .
array_splice
Another alternative is to use the array_splice() function, which allows you to replace a portion of an array by something else, which can be nothing . This function changes the original array and recreates the indexes.
Example:
$array = array(1, 2, 3, 4);
$pos = array_search(2, $array); //buscar posição do segundo elemento
array_splice($array, $pos, 1); //remove 1 elemento na posição encontrada
The result is the same as previously mentioned.
See the working code here .