[PHP] 重回基础（Array相关函数）详解编程语言

$arr=array(); 
$arr['one']="one"; 
$arr['two']="two"; 
$arr['three']="three"; 
 
$newArr=array_keys($arr); 
print_r($newArr); 
//Array ( [0] => one [1] => two [2] => three )

$arr=array(); 
$arr[20]="one"; 
$arr[30]="two"; 
$arr[40]="three"; 
 
$newArr=array_values($arr); 
print_r($newArr); 
//Array ( [0] => one [1] => two [2] => three )

$arr=array(); 
$arr[0]="one"; 
$arr[1]="two"; 
$arr[2]="three"; 
function test($v){ 
    return $v." Hello"; 
} 
$newArr=array_map("test",$arr); 
print_r($newArr); 
//Array ( [0] => one Hello [1] => two Hello [2] => three Hello )

$arr=array(); 
$arr[0]="one"; 
$arr[1]="two"; 
$arr[2]="three"; 
 
$arr1=array(); 
$arr[3]="taoshihan1"; 
$arr[4]="taoshihan2"; 
$arr[5]="taoshihan3"; 
 
$newArr=array_merge($arr,$arr1); 
print_r($newArr); 
//Array ( [0] => one [1] => two [2] => three [3] => taoshihan1 [4] => taoshihan2 [5] => taoshihan3 ) 
 
$arr=array("one","two","three"); 
$arr1=array("4","5","6"); 
$newArr=array_merge($arr,$arr1); 
print_r($newArr); 
//Array ( [0] => one [1] => two [2] => three [3] => 4 [4] => 5 [5] => 6 )

$arr=array("2"=>"taoshihan2","1"=>"taoshihan1","3"=>"taoshihan3"); 
ksort($arr); 
print_r($arr); 
//Array ( [1] => taoshihan1 [2] => taoshihan2 [3] => taoshihan3 )

$arr=array("2"=>"taoshihan2","1"=>"taoshihan1","3"=>"taoshihan3"); 
echo array_search("taoshihan1",$arr); 
// 1