(PHP 4, PHP 5, PHP 7)
compact — 锟斤拷锟斤拷一锟斤拷锟斤拷锟介，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角碉拷值
锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟介。
锟斤拷每锟斤拷锟斤拷锟斤拷锟斤拷compact() 锟节碉拷前锟侥凤拷锟脚憋拷锟叫诧拷锟揭该憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拥锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷筹拷为锟矫硷拷锟斤拷值锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟铰猴拷 extract() 锟斤拷锟斤拷锟洁反锟斤拷锟斤拷锟截斤拷锟斤拷锟叫憋拷锟斤拷锟斤拷咏锟饺ワ拷锟斤拷锟斤拷锟介。
Note:
锟斤拷 PHP 7.3 之前锟芥本锟斤拷未锟斤拷锟矫碉拷锟街凤拷锟斤拷锟结被锟斤拷默锟斤拷锟皆★拷
varname1compact() 锟斤拷锟杰可憋拷牟锟斤拷锟斤拷锟侥匡拷锟矫匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷址锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷椋拷锟斤拷锟斤拷锟斤拷谢锟斤拷锟斤拷园锟斤拷锟斤拷锟斤拷锟斤拷锟皆拷锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷椋� compact() 锟斤拷锟皆递归处锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷椋拷锟斤拷锟斤拷锟斤拷锟接碉拷锟斤拷锟叫憋拷锟斤拷锟斤拷
锟斤拷锟斤拷址锟斤拷锟街革拷锟侥憋拷锟斤拷未锟斤拷锟藉，compact() 锟斤拷锟斤拷锟� E_NOTICE 锟斤拷锟斤拷锟斤拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 7.3.0 | 锟斤拷锟节ｏ拷锟斤拷锟斤拷址锟斤拷锟街革拷锟侥憋拷锟斤拷未锟斤拷锟藉，compact() 锟斤拷锟斤拷锟� E_NOTICE 锟斤拷锟斤拷锟斤拷 锟节达拷之前锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷峋材拷锟斤拷缘锟斤拷锟� |
Example #1 compact() 锟斤拷锟斤拷
<?php
$city = "San Francisco";
$state = "CA";
$event = "SIGGRAPH";
$location_vars = array("city", "state");
$result = compact("event", "nothing_here", $location_vars);
print_r($result);
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
Array
(
[event] => SIGGRAPH
[city] => San Francisco
[state] => CA
)
Note: Gotcha
锟斤拷为锟缴憋拷锟斤拷锟�也锟斤拷锟斤拷锟节猴拷锟斤拷锟节诧拷锟斤拷锟斤拷 PHP 锟斤拷锟斤拷全锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟杰斤拷锟斤拷全锟斤拷锟斤拷锟介传锟斤拷锟斤拷 compact() 锟叫★拷