打开php中的php.ini文件找到如下代码：把前面的分号全部去掉就可以了！
；extension=php_bz2.dll
；extension=php_curl.dll
；extension=php_dba.dll
；extension=php_dbase.dll
；extension=php_exif.dll
；extension=php_fdf.dll
；extension=php_gd2.dll
；extension=php_gettext.dll
；extension=php_gmp.dll
；extension=php_ifx.dll
；extension=php_imap.dll
；extension=php_interbase.dll
；extension=php_ldap.dll
；extension=php_mbstring.dll
；extension=php_mcrypt.dll
；extension=php_mhash.dll
；extension=php_mime_magic.dll
；extension=php_ming.dll
；extension=php_msql.dll
；extension=php_mssql.dll
；extension=php_mysql.dll
；extension=php_mysqli.dll
；extension=php_oci8.dll
；extension=php_openssl.dll
；extension=php_pdo.dll
；extension=php_pdo_firebird.dll
；extension=php_pdo_mssql.dll
；extension=php_pdo_mysql.dll
；extension=php_pdo_oci.dll
；extension=php_pdo_oci8.dll
；extension=php_pdo_odbc.dll
；extension=php_pdo_pgsql.dll
；extension=php_pdo_sqlite.dll
；extension=php_pgsql.dll
；extension=php_pspell.dll
；extension=php_shmop.dll
；extension=php_snmp.dll
；extension=php_soap.dll
；extension=php_sockets.dll
；extension=php_sqlite.dll
；extension=php_sybase_ct.dll
；extension=php_tidy.dll
；extension=php_xmlrpc.dll
；extension=php_xsl.dll
；extension=php_zip.dll