(PHP 4, PHP 5, PHP 7)
array_keys — 锟斤拷锟斤拷锟斤拷锟斤拷锟叫诧拷锟街的伙拷锟斤拷锟叫的硷拷锟斤拷
array_keys() 锟斤拷锟斤拷 input
锟斤拷锟斤拷锟叫碉拷锟斤拷锟街伙拷锟斤拷锟街凤拷锟斤拷锟侥硷拷锟斤拷锟斤拷
锟斤拷锟街革拷锟斤拷丝锟窖★拷锟斤拷锟� search_value锟斤拷锟斤拷只锟斤拷锟截革拷值锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷
input 锟斤拷锟斤拷锟叫碉拷锟斤拷锟叫硷拷锟斤拷锟斤拷锟结被锟斤拷锟截★拷
input一锟斤拷锟斤拷锟介，锟斤拷锟斤拷锟斤拷要锟斤拷锟截的硷拷锟斤拷
search_value锟斤拷锟街革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷只锟叫帮拷锟斤拷锟斤拷些值锟侥硷拷锟脚会返锟截★拷
strict锟叫讹拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟角凤拷锟绞癸拷锟斤拷细锟侥比较ｏ拷===锟斤拷锟斤拷
锟斤拷锟斤拷 input 锟斤拷锟斤拷锟斤拷屑锟斤拷锟�
Example #1 array_keys() 锟斤拷锟斤拷
<?php
$array = array(0 => 100, "color" => "red");
print_r(array_keys($array));
$array = array("blue", "red", "green", "blue", "blue");
print_r(array_keys($array, "blue"));
$array = array("color" => array("blue", "red", "green"),
"size" => array("small", "medium", "large"));
print_r(array_keys($array));
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
Array
(
[0] => 0
[1] => color
)
Array
(
[0] => 0
[1] => 3
[2] => 4
)
Array
(
[0] => color
[1] => size
)