将数组中的值取出并重新排序

取出数组中的值并重置索引

• 用array_values数组函数

<?php
$arr =  [ 4 => 10, 1 => 22, 9 => 55, 0=>255];
$res = array_values($arr);
printf('<pre>%s</pre>',print_r($res,true));

• 数组遍历的方式

<?php
$arr1 = [ 4 => 10, 1 => 22, 9 => 55, 0=>255];
$res1 = [];
foreach($arr1 as $k => $v)
{
    array_push($res1,$v);
}
echo '<pre>';
print_r($res1);

• 头部移除数组单元的

<?php
$arr2 = [ 4 => 10, 1 => 22, 9 => 55, 0=>255];
$res2[] = array_shift($arr2);
$res2[] .= array_shift($arr2,);
$res2[] .= array_shift($arr2,);
$res2[] .= array_shift($arr2,);
echo '<pre>';
print_r($res2);