(PHP 4, PHP 5, PHP 7)
extension_loaded — 锟斤拷锟揭伙拷锟斤拷锟秸癸拷欠锟斤拷丫锟斤拷锟斤拷锟�
$name
) : bool锟斤拷锟揭伙拷锟斤拷锟秸癸拷欠锟斤拷丫锟斤拷锟斤拷亍锟�
name锟斤拷展锟斤拷锟狡ｏ拷锟斤拷小写锟斤拷锟斤拷锟叫★拷
锟斤拷锟斤拷锟斤拷锟� phpinfo() 锟斤拷锟介看一系锟斤拷锟斤拷展锟斤拷锟狡ｏ拷锟斤拷锟斤拷 CGI 锟斤拷 CLI 锟斤拷 PHP 锟芥本锟斤拷锟斤拷锟斤拷锟绞癸拷锟� -m 锟斤拷锟斤拷锟斤拷锟叫筹拷锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷展锟斤拷
$ php -m [PHP Modules] xml tokenizer standard sockets session posix pcre overload mysql mbstring ctype [Zend Modules]
锟斤拷锟� name 指锟斤拷锟斤拷锟斤拷展锟窖硷拷锟截ｏ拷锟斤拷锟斤拷TRUE锟斤拷锟斤拷锟津返伙拷 FALSE锟斤拷
Example #1 extension_loaded() 锟斤拷锟斤拷
<?php
if (!extension_loaded('gd')) {
if (!dl('gd.so')) {
exit;
}
}
?>