PHP常见数组排序方法小汇总

bool sort(array &array [,int sort_flags]
bool rsort(array &array [.int_sort_flags]

$a=array(4,7,9,1);
sort($a);
pirnt_r($a);
rsort($a);
print_r($a);

$data= array(5=>"five",8=>"eight",1=>"one",7=>"seven");
ksrot($data);
print_r($data);
krsot($data);
print_r($data);

$data=array("a"=>1,"b"=>2,"c"=>3);
asort($data);
print_r($data);
arsort($data);
print_r($data);

$data=array("file1.txt","file11.txt","file111.txt");
natsort($data);//普通自然排序
natcasesort($data);//忽略大小写

bool usort(array &array ,callback cmp_function)
bool uasort(array &array,callback cmp_function)
bool uksort(array &array,callback cmp_function)

$data= array("ab","abc","a","ac","abcd");
usrot($data,"mysortByLen");
function mysortByLen($one,$two){
 if(strlen($one)== strlen($two)){
  return 0;
 }else{
 return (strlen($one)>strlen($two))?1:-1;
}

bool array_multisort(array array1 [,mixed arg,[,array ....]])

$data=array(
  array("id"=>1,"name"=>4),
  array("id"=>1,"name"=>2),
  array("id"=>2,"name"=>3)
);
foreach($data as $key=>$value){
 $ids[$key]=$value["id"];
 $names[$key]=$value["name"]
}
array_multisort($data,$ids,$names);
print_r($data);

array(    array("id"=>1,"name"=>2),    array("id"=>1,"name"=>4),    array("id"=>2,"name"=>3)
 );