$insert
= [1=>[
'name'
=>
'java'
,
'age'
=>20],3=>[
'name'
=>
'c#'
,
'age'
=>20]];
$arr
= [[
'name'
=>
'php'
,
'age'
=>20],[
'name'
=>
'js'
,
'age'
=>22],[
'name'
=>
'python'
,
'age'
=>23],[
'name'
=>
'c'
,
'age'
=>24]];
[[
'name'
=>
'php'
,
'age'
=>20],[
'name'
=>
'java'
,
'age'
=>20],[
'name'
=>
'js'
,
'age'
=>22],[
'name'
=>
'c#'
,
'age'
=>20],[
'name'
=>
'python'
,
'age'
=>23],[
'name'
=>
'c'
,
'age'
=>24]];
array_splice
(
$arr
,1,0,
$insert
);