Get and remove first element of an array in PHP

问题:

Hi I am coding a system in which I need a function to get and remove the first element of the array. This array has numbers i.e.

0,1,2,3,4,5

how can I loop through this array and with each pass get the value and then remove that from the array so at the end of 5 rounds the array will be empty.

Thanks in advance

回答1:

You might try using foreach/unset, instead of array_shift.

$array = array(0, 1, 2, 3, 4, 5);

foreach($array as $value)
{
    // with each pass get the value
    // use method to doSomethingWithValue($value);
    echo $value;
    // and then remove that from the array 
    unset($array[$value]);
}
//so at the end of 6 rounds the array will be empty
assert('empty($array) /* Array must be empty. */');
?>

回答2:

You can use array_shift for this:

while (($num = array_shift($arr)) !== NULL) {
  // use $num
}