?? ?? ??? ????????.

array_slice ( array $array , int $offset [, int $length [, bool $preserve_keys ]] )

array_slice ( )? offset ? length ????? ??? ??? ???? ?????.

???? ??? ?? ?? ???? ??? ? ????? ?????. ???? ???? ???? ??? ??? ??? ?? ?????.

??? ???? ???? ???? ???? ?? ?? ???. ??? ???? ???? ???? ??? ??? ??? ?? ?????. ???? ???? ??????? ???? ??? ??? ?????.

array_slice()? ????? ??? ?? ??????. PHP 5.0.2??, Preserve_keys? TRUE? ???? ? ??? ??? ? ????.

$input = array("a", "b", "c", "d", "e");
$output = array_slice($input, );  //返回下標(biāo)開(kāi)始的數(shù)組 returns "c", "d", and "e"
$output = array_slice($input, -, ); // returns "d"
$output = array_slice($input, , ); // returns "a", "b", and "c"
// note the differences in the array keys
print_r(array_slice($input, , -));
print_r(array_slice($input, , -, true));

??? ??? ?? ? ?? ???? ?? ?? ?? shuffle($input)? ???? ?? ??? ????? ?? array_slice? ???? ?? ? ????

PS: PHP array_slice() ??

?? ? ???

array_slice() ??? ??? ?? ???? ? ????? ??? ?????.

??: ??? ??? ?? ?? ?? ??? ??? ? ??? ?????. (?? 4 ??)

??

array_slice(array,offset,length,preserve)

?? 1

<?php
$a=array(0=>"Dog",1=>"Cat",2=>"Horse",3=>"Bird");
print_r(array_slice($a,1,2));
?>

??:

Array ( [0] => Cat [1] => Horse )

? 2

?? ??? ???? ??:

<?php
$a=array(0=>"Dog",1=>"Cat",2=>"Horse",3=>"Bird");
print_r(array_slice($a,-2,1));
?>

??:

Array ( [0] => Horse )

? 3

true? ??? ???? ??:

<?php
$a=array(0=>"Dog",1=>"Cat",2=>"Horse",3=>"Bird");
print_r(array_slice($a,1,2,true));
?>

??:

Array ( [1] => Cat [2] => Horse )

? 4

??? ? ??:

<?php
$a=array("a"=>"Dog","b"=>"Cat","c"=>"Horse","d"=>"Bird");
print_r(array_slice($a,1,2));
?>

??:

Array ( [b] => Cat [c] => Horse )

?? array_slice ??? ???? ??? ?? ?? ?? ? ?? ???? ?? ?? ? ??? ??? PHP???. ??? ???? ?????.

array_slice ??? ???? ??? ???? ?? ? ?? ??? ??? ?? PHP ?? ??? ? ??? PHP ??? ????? ?????!