PHP - 按索引范围获取数组记录
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PHP - get array records by index range
提问by user398341
HI there,
你好呀，
Is there any PHP native function which returns the range of records from the array based on the start and end of the index?
是否有任何 PHP 本机函数根据索引的开始和结束返回数组中的记录范围？
i.e.:
IE：
array(0 => 'a', 1 => 'b', 2 => 'c', 3 => 'd');
and now I would like to only return records between index 1 and 3 (b, c, d).
现在我只想返回索引 1 和 3 (b, c, d) 之间的记录。
Any idea?
任何的想法？
回答by polarblau
Couldn't you do that with e.g. array_slice?
你不能用 eg 做到这一点array_slice吗？
$a = array(0 => 'a', 1 => 'b', 2 => 'c', 3 => 'd');
array_slice($a, 1, 3);
回答by bensiu
there is a task for array_slice
array_slice有一个任务
array array_slice ( array $array , int $offset [, int $length [, bool $preserve_keys = false ]] )
array array_slice ( array $array , int $offset [, int $length [, bool $preserve_keys = false ]] )
example:
例子：
$input = array("a", "b", "c", "d", "e");
$output = array_slice($input, 2); // returns "c", "d", and "e"
$output = array_slice($input, -2, 1); // returns "d"
$output = array_slice($input, 0, 3); // returns "a", "b", and "c"
// note the differences in the array keys
print_r(array_slice($input, 2, -1));
print_r(array_slice($input, 2, -1, true));
回答by Mukesh Chapagain
By using array_intersect_key
通过使用 array_intersect_key
$myArray = array(0 => 'a', 1 => 'b', 2 => 'c', 3 => 'd');
$arrayRange = array('1', '2', '3');
// this can also be used if you have integer only array values
// $arrayRange = range(1,3);
$newArray = array_intersect_key($myArray, array_flip($arrayRange));
print_r($newArray); // output: Array ( [1] => b [2] => c [3] => d )
回答by Kaiser
$array1 = array(1,2,3,4,5,6,23,24,26,21,12);
foreach(range ($array1[0],$array1[5]) as $age){
echo "Age: {$age}<br />";
}
you should get the following output:
你应该得到以下输出：
Age: 1
年龄：1
Age: 2
年龄：2
Age: 3
年龄：3
Age: 4
年龄：4
Age: 5
年龄：5
Age: 6
年龄：6
