php - 数组的 Foreach 循环

Question

请问，foreach 如何从数组中的第二个数字循环。

$num = array("20","40","89","300","190","15");
$new = 0;
foreach ($num as $val) {
   $new = $val;
  echo "Value: $new\n";
}

预期结果是
值：40 值：89 值：300 值：190 值：15
得到的是
值：20 值：40 值：89 值：300 值：190 值：15

标签： phparrayssortingarraylist

Answer 1

只需与数组$val的第一个元素（$num在本例中为$num[0].

$num = array("20","40","89","300","190","15");

foreach ($num as $val) {
  if ($val==$num[0]) continue;
  echo "Value: $val\n";
}

或使用布尔标志：

$num = array("20","40","89","300","190","15");
$ignoreFirst=true;
foreach ($num as $val) {
  if ($ignoreFirst) {$ignoreFirst=false;continue;}
  echo "Value: $val\n";
}