我写了一个perl模块:
package sql;
use strict;
use XML::Simple;
use DBI;
use DBD::mysql;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(DBImport DataFill);
our @EXPORT = qw(DBImport DataFill);
our $dbh;
sub DBConnect() {
my $platform = "mysql";
my $database = "databasename";
my $host = "localhost";
my $user = "user";
my $pw = "password";
my $dsn = "dbi:mysql:$database:localhost";
$dbh = DBI->connect($dsn, $user, $pw);
$dbh->do('SET NAMES utf8');
return $dbh;
}
sub Query($) {
my $sth = $dbh->prepare(shift);
$sth->execute;
while (my $ref = $sth->fetchrow_hashref()) {
print $ref->{'email'};
}
$sth->finish();
}
BEGIN{
$dbh = &DBConnect();
}
END{
$dbh->disconnect();
}
1;
我尝试使用它:
#!/usr/bin/perl
use strict;
use CGI qw/:standard/;
use CGI::Carp qw/fatalsToBrowser warningsToBrowser/;
use sql;
&Query("SELECT * FROM users");
但它不起作用。
错误消息:未定义的子例程& main ::在/var/www/domains/gabordx.tauri.hu/www/main.pl第7行调用的查询。 - > “& Query(”SELECT * FROM users“);”
有什么问题?
谢谢!
答案 0 :(得分:2)
您可以直接调用它,在模块名称前加上:
sql::Query("SELECT * FROM users");
或者您可以从模块中导入
our @EXPORT_OK = qw(Query DBImport DataFill); # In the module
use sql qw(Query); # In caller code
或者您可以默认从sql.pm
导出它our @EXPORT = qw(Query DBImport DataFill);
@EXPORT
和@EXPORT_OK
的参考:http://perldoc.perl.org/Exporter.html#How-to-Export
答案 1 :(得分:1)
您还需要导出Query
,如下所示:
our @EXPORT_OK = qw(Query DBImport DataFill);
our @EXPORT = qw(Query DBImport DataFill);
否则你应该通过sql
包引用它,就像这个
sql::Query("SELECT * FROM users");
答案 2 :(得分:0)