php - Rebuild array with standard keys

Solution:

Or you can use array_values to reset all the keys.

if (condition) {
   unset($pieces[0]);
   $pieces = array_values($pieces);
}
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If you remove item [5], it will make [6] -> [5]

Solution:

You can use the PHP array_shift() function to remove the first element or value from an array. The array_shift() function also returns the removed value of array. However, if the array is empty (or the variable is not an array), the returned value will be NULL.

<?php
$pizza  = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);

// Deleting first array item
$removed = array_shift($pieces);
print_r($pieces);
echo "<br>";
var_dump($removed);
?>
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Output

Array ( [0] => piece2 [1] => piece3 [2] => piece4 [3] => piece5 [4] => piece6 ) 
// Removed
    string(6) "piece1"
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Solution:

Usingarray_values

$pieces = array_values($pieces);
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Solution:

$pizza  = "piece1 piece2 piece3 piece4 piece5 piece6";
$arr = explode(" ", $pizza);
foreach($arr as $k => $v) {
    if($v == 'piece3' || $v == 'piece5') {
        array_splice($arr, $k, 1);
    }
}
print_r($arr);

// Array
// (
//     [0] => piece1
//     [1] => piece2
//     [2] => piece4
//     [3] => piece5
// )
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Solution:

Have a look at the array_filter function. It makes you able to use even more complex decisions.

$result = array_filter($pieces, function($index) {
    return $index > 0;
}, ARRAY_FILTER_USE_KEY);
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