在使用php_curl.dll库的时候，error.log中出现不能加载动态库，于是找到如下一篇文章，解决了疑问。但是我想有没有其它的方法呢，这样还要拷贝，有点麻烦，能不能改变其它呢？
解决的办法有两个：
1 将这些依赖的dll拷贝到％windir％/system32下
2 或者将PHP5的安装目录添加到%PATH%中。
无论那个都可以很好地达到我们地目的。
够简单的，但是有时候还就想不到哪儿去。
到底哪些扩展依赖哪些dll呢？以下列表可以帮助我们回答这个问题：
php_curl.dll CURL, Client URL library functions Requires: libeay32.dll, ssleay32.dll (bundled)
php_domxml.dll DOM XML functions PHP <= 4.2.0 requires: libxml2.dll
(bundled) PHP >= 4.3.0 requires: iconv.dll (bundled)
php_fdf.dll FDF: Forms Data Format functions. Requires: fdftk.dll
gnu_gettext.dll (bundled), PHP >= 4.2.3 requires libintl-1.dll,
php_iconv.dll ICONV characterset conversion Requires: iconv-1.3.dll
php_ingres.dll Ingres II functions Requires: Ingres II libraries
php_interbase.dll InterBase functions Requires: gds32.dll (bundled)
php_java.dll Java functions PHP <= 4.0.6 requires: jvm.dll (bundled)
php_ldap.dll LDAP functions PHP <= 4.2.0 requires libsasl.dll(bundled),
PHP >= 4.3.0 requires libeay32.dll,ssleay32.dll (bundled)
php_mcrypt.dll Mcrypt Encryption functions Requires: libmcrypt.dll
php_mhash.dll Mhash functions PHP >= 4.3.0 requires: libmhash.dll (bundled)
php_mcrypt.dll Mcrypt Encryption functions Requires: libmcrypt.dll
php_mhash.dll Mhash functions PHP >= 4.3.0 requires: libmhash.dll (bundled)
php_msql.dll mSQL functions Requires: msql.dll (bundled)
php_mssql.dll MSSQL functions Requires: ntwdblib.dll (bundled)
php_mysql.dll MySQL functions PHP >= 5.0.0, requires libmysql.dll (bundled)
php_mysqli.dll MySQLi functions PHP >= 5.0.0, requires libmysqli.dll (bundled)
php_oci8.dll Oracle 8 functions Requires: Oracle 8.1+ client libraries
php_openssl.dll OpenSSL functions Requires: libeay32.dll (bundled)
php_oracle.dll Oracle functions Requires: Oracle 7 client libraries
php_sybase_ct.dll Sybase functions Requires: Sybase client libraries
php_xmlrpc.dll XML-RPC functions PHP >= 4.2.1 requires: iconv.dll (bundled)
php_xslt.dll XSLT functions PHP <= 4.2.0 requires sablot.dll, expat.dll (bundled).
PHP >= 4.2.1 requires sablot.dll, expat.dll, iconv.dll (bundled).