本文实例讲述了PHP函数extension_loaded()用法。分享给大家供大家参考。具体分析如下:
extension_loaded — 检查一个扩展是否已经加载
例如:
if (!extension_loaded('gd')) {
if (!dl('gd.so')) {
exit;
}
}
?>
上述代码判断是否加载 gd 库扩展。
补充:
查看php已开启扩展的方法:
命令行cmd界面:
输入:php -m
显示结果如下:
[PHP Modules]
bcmath
bz2
calendar
com_dotnet
ctype
curl
date
dom
filter
ftp
gd
hash
iconv
json
libxml
mbstring
mcrypt
mysql
mysqli
odbc
pcre
PDO
pdo_mysql
PDO_ODBC
pdo_sqlite
Reflection
session
SimpleXML
sockets
SPL
SQLite
standard
tokenizer
wddx
xml
xmlreader
xmlwriter
Zend Optimizer
zip
[Zend Modules]
希望本文所述对大家的php程序设计有所帮助。
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