忽略数组中的第一个值

Question

我在php中有一系列傅立叶变换值，如下所示。

[8974,398.22605659378,340.40931712583,224.61805748557,224.21476160103,531.02102311671,348.09311299013,74.373164045484,440.15451832283,379.54095616825,801.05398080895,184.15175862698,539.59590498835,114.82864261836,595.84662567888,488.12623039438,370,488.12623039438,595.84662567888,114.82864261836,539.59590498835,184.15175862698,801.05398080895,379.54095616825,440.15451832283,74.373164045484,348.09311299013,531.02102311671,224.21476160103,224.61805748557,340.40931712582,398.22605659378]

如何在php语言中实际忽略/删除本案例“8974”中的第一个值？

Answer 1

忽略它

通过跳过第一个元素来创建第一个临时数组：

foreach (array_slice($arr, 1) as $xyz) {
   /// ...
}

或者，不创建临时数组：

reset($arr); next($arr); // reset and skip first element
while (list($key, $value) = each($arr)) {
    echo $value;
}

修改

通过关闭第一项来修改数组：

array_shift($arr);
// do whatever you want

Answer 2

您可以使用array_shift();

<强>像

    $array=array(8974,398.22605659378,340.40931712583,224.61805748557,224.21476160103,531.02102311671,348.09311299013,74.373164045484,440.15451832283,379.54095616825,801.05398080895,184.15175862698,539.59590498835,114.82864261836,595.84662567888,488.12623039438,370,488.12623039438,595.84662567888,114.82864261836,539.59590498835,184.15175862698,801.05398080895,379.54095616825,440.15451832283,74.373164045484,348.09311299013,531.02102311671,224.21476160103,224.61805748557,340.40931712582,398.22605659378);
array_shift($array);
print_r($array);

Answer 3

您可以使用array_shift

即：

 $myArray = array(8974,398.22605659378,340.40931712583,224.61805748557,224.21476160103,531.02102311671,348.09311299013,74.373164045484,440.15451832283,379.54095616825,801.05398080895,184.15175862698,539.59590498835,114.82864261836,595.84662567888,488.12623039438,370,488.12623039438,595.84662567888,114.82864261836,539.59590498835,184.15175862698,801.05398080895,379.54095616825,440.15451832283,74.373164045484,348.09311299013,531.02102311671,224.21476160103,224.61805748557,340.40931712582,398.22605659378);
 array_shift($myArray)

Answer 4

您可以轻松unset第一个元素删除它：

unset($array[0]);