php 數組指定位置插入數據單元

array_splice(array,offset,length,array)

案例 1

<?php
  $a1=array(0=>"Dog",1=>"Cat",2=>"Horse",3=>"Bird");
  $a2=array(0=>"Tiger",1=>"Lion");

  array_splice($a1,0,2,$a2);

  print_r($a1);
?>

輸出: 

Array ( [0] => Tiger [1] => Lion [2] => Horse [3] => Bird )

 案例2:

<?php
  $a1=array(0=>"Dog",1=>"Cat");
  $a2=array(0=>"Tiger",1=>"Lion");

  array_splice($a1,1,0,$a2);
  
  print_r($a1);
?>

輸出

Array ( [0] => Dog [1] => Tiger [2] => Lion [3] => Cat )