# Module::Load - perldoc - [phpMan] ## NAME [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) - runtime require of both modules and files ## SYNOPSIS use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown); my $module = '[Data::Dumper](https://www.chedong.com/phpMan.php/perldoc/Data%3A%3ADumper/markdown)'; load [Data::Dumper](https://www.chedong.com/phpMan.php/perldoc/Data%3A%3ADumper/markdown); # loads that module, but not import any functions # -> cannot use 'Dumper' function load '[Data::Dumper](https://www.chedong.com/phpMan.php/perldoc/Data%3A%3ADumper/markdown)'; # ditto load $module # tritto autoload [Data::Dumper](https://www.chedong.com/phpMan.php/perldoc/Data%3A%3ADumper/markdown); # loads that module and imports the default functions # -> can use 'Dumper' function my $script = 'some/script.pl' load $script; load 'some/script.pl'; # use quotes because of punctuations load thing; # try 'thing' first, then 'thing.pm' load CGI, ':all'; # like 'use CGI qw[:standard]' ## DESCRIPTION "[Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown)" eliminates the need to know whether you are trying to require either a file or a module. If you consult "perldoc -f require" you will see that "require" will behave differently when given a bareword or a string. In the case of a string, "require" assumes you are wanting to load a file. But in the case of a bareword, it assumes you mean a module. This gives nasty overhead when you are trying to dynamically require modules at runtime, since you will need to change the module notation ("[Acme::Comment](https://www.chedong.com/phpMan.php/perldoc/Acme%3A%3AComment/markdown)") to a file notation fitting the particular platform you are on. "[Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown)" eliminates the need for this overhead and will just DWYM. Difference between "load" and "autoload" "[Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown)" imports the two functions - "load" and "autoload" "autoload" imports the default functions automatically, but "load" do not import any functions. "autoload" is usable under "BEGIN{};". Both the functions can import the functions that are specified. Following codes are same. load [File::Spec::Functions](https://www.chedong.com/phpMan.php/perldoc/File%3A%3ASpec%3A%3AFunctions/markdown), qw/splitpath/; autoload [File::Spec::Functions](https://www.chedong.com/phpMan.php/perldoc/File%3A%3ASpec%3A%3AFunctions/markdown), qw/splitpath/; ## FUNCTIONS load Loads a specified module. See "Rules" for detailed loading rule. autoload Loads a specified module and imports the default functions. Except importing the functions, 'autoload' is same as 'load'. load_remote Loads a specified module to the specified package. use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) 'load_remote'; my $pkg = '[Other::Package](https://www.chedong.com/phpMan.php/perldoc/Other%3A%3APackage/markdown)'; load_remote $pkg, '[Data::Dumper](https://www.chedong.com/phpMan.php/perldoc/Data%3A%3ADumper/markdown)'; # load a module to '[Other::Package](https://www.chedong.com/phpMan.php/perldoc/Other%3A%3APackage/markdown)' # but do not import 'Dumper' function A module for loading must be quoted. Except specifing the package and quoting module name, 'load_remote' is same as 'load'. autoload_remote Loads a specified module and imports the default functions to the specified package. use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) 'autoload_remote'; my $pkg = '[Other::Package](https://www.chedong.com/phpMan.php/perldoc/Other%3A%3APackage/markdown)'; autoload_remote $pkg, '[Data::Dumper](https://www.chedong.com/phpMan.php/perldoc/Data%3A%3ADumper/markdown)'; # load a module to '[Other::Package](https://www.chedong.com/phpMan.php/perldoc/Other%3A%3APackage/markdown)' # and imports 'Dumper' function A module for loading must be quoted. Except specifing the package and quoting module name, 'autoload_remote' is same as 'load_remote'. ## Rules All functions have the following rules to decide what it thinks you want: * If the argument has any characters in it other than those matching "\w", ":" or "'", it must be a file * If the argument matches only "[\w:']", it must be a module * If the argument matches only "\w", it could either be a module or a file. We will try to find "file.pm" first in @INC and if that fails, we will try to find "file" in @INC. If both fail, we die with the respective error messages. ## IMPORTS THE FUNCTIONS 'load' and 'autoload' are imported by default, but 'load_remote' and 'autoload_remote' are not imported. To use 'load_remote' or 'autoload_remote', specify at 'use'. "load","autoload","load_remote","autoload_remote" Imports the selected functions. # imports 'load' and 'autoload' (default) use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown); # imports 'autoload' only use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) 'autoload'; # imports 'autoload' and 'autoload_remote', but don't import 'load'; use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) qw/autoload autoload_remote/; 'all' Imports all the functions. use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) 'all'; # imports load, autoload, load_remote, autoload_remote '','none',undef Not import any functions ("load" and "autoload" are not imported). use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) ''; use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) 'none'; use [Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown) undef; ## Caveats Because of a bug in perl (#19213), at least in version 5.6.1, we have to hardcode the path separator for a require on Win32 to be "/", like on Unix rather than the Win32 "\". Otherwise perl will not read its own %INC accurately double load files if they are required again, or in the worst case, core dump. "[Module::Load](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoad/markdown)" cannot do implicit imports, only explicit imports. (in other words, you always have to specify explicitly what you wish to import from a module, even if the functions are in that modules' @EXPORT) ## SEE ALSO [Module::Runtime](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ARuntime/markdown) provides functions for loading modules, checking the validity of a module name, converting a module name to partial ".pm" path, and related utility functions. "require" in perlfunc <> and "use" in perlfunc <>. [Mojo::Loader](https://www.chedong.com/phpMan.php/perldoc/Mojo%3A%3ALoader/markdown) is a "class loader and plugin framework", and is included in the Mojolicious <> distribution. [Module::Loader](https://www.chedong.com/phpMan.php/perldoc/Module%3A%3ALoader/markdown) is a module for finding and loading modules in a given namespace, inspired by "[Mojo::Loader](https://www.chedong.com/phpMan.php/perldoc/Mojo%3A%3ALoader/markdown)". ## ACKNOWLEDGEMENTS Thanks to Jonas B. Nielsen for making explicit imports work. ## BUG REPORTS Please report bugs or other issues to <>. ## AUTHOR This module by Jos Boumans <>. ## COPYRIGHT This library is free software; you may redistribute and/or modify it under the same terms as Perl itself.