+++ /dev/null
-QUESTION INDEX
---------------
-
-GENERAL
-
-Q: What is Smarty?
-Q: What's the difference between Smarty and other template engines?
-Q: What do you mean "Compiled PHP Scripts" ?
-Q: Why can't I just use PHPA (http://php-accelerator.co.uk) or Zend Cache?
-Q: Why does smarty have a built in cache? Wouldn't it be better to handle this
- in a separate class?
-Q: Is Smarty faster than <insert other PHP template engine>?
-Q: How can I be sure to get the best performance from Smarty?
-Q: Do you have a mailing list?
-Q: Can you change the mailing list so reply-to sends to the list and not the
- user?
-
-TROUBLESHOOTING
-
-Q: Smarty doesn't work.
-Q: I get the following error when running Smarty:
- Warning: Smarty error: problem creating directory "templates_c/239/239105369"
- in /path/to/Smarty.class.php on line 542
-Q: I get the following error when running Smarty:
- Warning: Wrong parameter count for preg_replace() in
- Smarty.class.php on line 371
-Q: I get this error when passing variables to {include}:
- Fatal error: Call to undefined function: get_defined_vars() in
- /path/to/Smarty/templates_c/index.tpl.php on line 8
-Q: I get PHP errors in my {if} tag logic.
-Q: I'm changing my php code and/or templates, and my results are not getting
- updated.
-Q: I'm running Windows 2000 and I get blank content. My compiled PHP files are
- also zero length.
-Q: The template goes into an infinite loop when I include included templates
- that pass local variables
-Q: Javascript is causing Smarty errors in my templates.
-Q: I get "SAFE MODE Restriction in effect. ..."-errors when running smarty.
-
-MISC
-
-Q: Can I use Macromedia's Dreamweaver to edit my templates?
-Q: Dreamweaver is urlencoding the template delimiters when they are in a SRC or
- HREF link. How do I get around this?
-
-HOWTO
-
-Q: How do I generate different cache files per template based on arguments
- passed to the page?
-Q: How do I pass a template variable as a parameter? {function param={$varname}}
- does not work.
-Q: How do I include cached template(s) within a non-cached template?
-
-
-GENERAL
--------
-
-Q: What is Smarty?
-A: Smarty is a template engine for PHP... but be aware this isn't just another
- PHP template engine. It's much more than that.
-
-Q: What's the difference between Smarty and other template engines?
-A: Most other template engines for PHP provide basic variable substitution and
- dynamic block functionality. Smarty takes a step further to be a "smart"
- template engine, adding features such as configuration files, template
- functions, variable modifiers (see the docs!) and making all of this
- functionality as easy as possible to use for both programmers and template
- designers. Smarty also compiles the templates into PHP scripts, eliminating
- the need to parse the templates on every invocation, making Smarty extremely
- scalable and manageable for large application needs.
-
-Q: What do you mean "Compiled PHP Scripts" ?
-A: Smarty reads the template files and creates PHP scripts from them. Once
- these PHP scripts are created, Smarty executes these, never having to parse
- the template files again. If you change a template file, Smarty will
- recreate the PHP script for it. All this is done automatically by Smarty.
- Template designers never need to mess with the generated PHP scripts or even
- know of their existance. (NOTE: you can turn off this compile checking step
- in Smarty for increased performance.)
-
-Q: Why can't I just use PHPA (http://php-accelerator.co.uk) or Zend Cache?
-A: You certainly can, and we highly recommend it! What PHPA does is caches
- compiled bytecode of your PHP scripts in shared memory or in a file. This
- speeds up server response and saves the compilation step. Smarty creates PHP
- scripts, which PHPA will cache nicely. Now, Smarty's built-in cache is
- something completely different. It caches the _output_ of the template
- contents. For example, if you have a template that requires several database
- queries, Smarty can cache this output, saving the need to call the database
- every time. Smarty and PHPA (or Zend Cache) complement each other nicely. If
- performance is of the utmost importance, we would recommend using one of
- these with any PHP application, using Smarty or not. As you can see in the
- benchmarks, Smartys performance _really_ excels in combination with a PHP
- accelerator.
-
-Q: Why does Smarty have a built in cache? Wouldn't it be better to handle this
- in a separate class?
-A: Smarty's caching functionality is tightly integrated with the template
- engine, making it quite a bit more flexible than a simple caching wrapper.
- For instance, you can cache select portions of a template page. Let's say
- you have a polling box on your site. With Smarty, you can leave the poll
- dynamic and cache the rest of the page. You can also pass templates
- multiple cache ids, meaning that a template can have several caches
- depending on URL, cookies, etc.
-
-Q: Is Smarty faster than <insert other PHP template engine>?
-A: See the benchmark page for some performance comparisons. Smarty's approach
- to templates is a bit different from some languages: it compiles templates
- into PHP scripts instead of parsing them on each invocation. This usually
- results in great performance gains, especially with complex templates.
- Coupled with the built-in caching of Smarty templates, the performance is
- outstanding.
-
-Q: How can I be sure to get the best performance from Smarty?
-A: Be sure you set $compile_check=false once your templates are initially
- compiled. This will skip the unneeded step of testing if the template has
- changed since it was last compiled. If you have complex pages that don't
- change too often, turn on the caching engine and adjust your application so
- it doesn't do unnecessary work (like db calls) if a cached page is
- available. See the documentation for examples.
-
-Q: Do you have a mailing list?
-A: We have a few mailing lists. "general" for you to share your ideas or ask
- questions, "dev" for those interested in the development efforts of Smarty,
- and "cvs" for those that would like to track the updates made in the cvs
- repository.
-
- send a blank e-mail message to:
- smarty-general-subscribe@lists.php.net (subscribe to the general list)
- smarty-general-unsubscribe@lists.php.net (unsubscribe from the general list)
- smarty-general-digest-subscribe@lists.php.net (subscribe to digest)
- smarty-general-digest-unsubscribe@lists.php.net (unsubscribe from digest)
- smarty-dev-subscribe@lists.php.net (subscribe to the dev list)
- smarty-dev-unsubscribe@lists.php.net (unsubscribe from the dev list)
- smarty-cvs-subscribe@lists.php.net (subscribe to the cvs list)
- smarty-cvs-unsubscribe@lists.php.net (unsubscribe from the cvs list)
- You can also browse the mailing list archives at
- http://marc.theaimsgroup.com/?l=smarty&r=1&w=2
-
-
-
-Q: Can you change the mailing list so Reply-To sends to the list and not the
- user?
-A: Yes we could, but no we won't. Use "Reply-All" in your e-mail client to send
- to the list. http://www.unicom.com/pw/reply-to-harmful.html
-
-TROUBLESHOOTING
----------------
-
-Q: Smarty doesn't work.
-A: You must be using PHP 4.0.6 or later if you use any version of Smarty
- past 2.0.1. Read the BUGS file for more info.
-
-Q: I get the following error when running Smarty:
- Warning: Smarty error: problem creating directory "templates_c/239/239105369"
- in /path/to/Smarty.class.php on line 542
-A: Your web server user does not have permission to write to the templates_c
- directory, or is unable to create the templates_c directory. Be sure the
- templates_c directory exists in the location defined in Smarty.class.php,
- and the web server user can write to it. If you do not know the web server
- user, chmod 777 the templates_c directory, reload the page, then check the
- file ownership of the files created in templates_c. Or, you can check the
- httpd.conf (usually in /usr/local/apache/conf) file for this setting:
- User nobody
- Group nobody
-
-Q: I get the following error when running Smarty: Warning: Wrong parameter
- count for preg_replace() in Smarty.class.php on line 371
-A: preg_replace had a parameter added in PHP 4.0.2 that Smarty
- requires. Upgrade to at least 4.0.6 to fix all known PHP issues with
- Smarty.
-
-Q: I get this error when passing variables to {include}:
- Fatal error: Call to undefined function: get_defined_vars() in
- /path/to/Smarty/templates_c/index.tpl.php on line 8
-A: get_defined_vars() was added to PHP 4.0.4. If you plan on passing
- variables to included templates, you will need PHP 4.0.6 or later.
-
-Q: I get PHP errors in my {if} tag logic.
-A: All conditional qualifiers must be separated by spaces. This syntax will not
- work: {if $name=="Wilma"} You must instead do this: {if $name == "Wilma"}.
- The reason for this is syntax ambiguity. Both "==" and "eq" are equivalent
- in the template parser, so something like {if $nameeq"Wilma"} wouldn't be
- parsable by the tokenizer.
-
-Q: I'm changing my php code and/or templates, and my results are not getting
- updated.
-A: This may be the result of your compile or cache settings. If you are
- changing your php code, your templates will not necessarily get recompiled
- to reflect the changes. Use $force_compile during develpment to avoid these
- situations. Also turn off caching during development when you aren't
- specifically testing it. You can also remove everything from your
- compile_dir and cache_dir and reload the page to be sure everything gets
- regenerated.
-
-Q: I'm running Windows 2000 and I get blank content. My compiled PHP files are
- also zero length.
-A: There seems to be a problem with some W2k machines and exclusive file
- locking. Comment out the flock() call in _write_file to get around this,
- although be aware this could possibly cause a problem with simultaneous
- writes to a file, especially with caching turned on. NOTE: As of Smarty
- 1.4.0, a workaround was put in place that should solve this.
-
-Q: The template goes into an infinite loop when I include included templates
- that pass local variables
-A: This was fixed in 1.3.2 (new global attribute)
-
-Q: Javascript is causing Smarty errors in my templates.
-A: Surround your javascript with {literal}{/literal} tags. See the docs.
-
-Q: I get "SAFE MODE Restriction in effect. ..."-errors when running smarty.
-A: Use $smarty->use_sub_dirs = false when running php in safe mode.
-
-MISC
-----
-
-Q: Can I use Macromedia's Dreamweaver to edit my templates?
-A: Certainly. You might want to change your tag delimiters from {} to something
- that resembles valid HTML, like <!--{ }--> or <{ }> or something similar.
- This way the editor won't view the template tags as errors.
-
-Q: Dreamweaver is urlencoding the template delimiters when they are in a SRC or
- HREF link. How do I get around this?
-A: In Edit - Properties - Rewrite HTML you can specify if Dreamweaver should
- change special letters to %-equivalent or not. The default is on which
- produces this error.
-
-HOWTO
------
-
-Q: How do I generate different cache files per template based on arguments
- passed to the page?
-A: Use your $REQUEST_URI as the cache_id when fetching the page:
-
- global $REQUEST_URI; // if not already present
- $smarty->display('index.tpl',$REQUEST_URI);
-
- This will create a separate cache file for each unique URL when you call
- index.tpl. See the documentation for display() and fetch()
-
-Q: How do I pass a template variable as a parameter? {function param={$varname}}
- does not work.
-A: {function param=$varname} (You cannot nest template delimiters.)
-
-Q: How do I include cached template(s) within a non-cached template?
-A: One way to do it:
-
- $smarty->caching = true;
- $tpl1 = $smarty->fetch("internal1.tpl");
- $tpl2 = $smarty->fetch("internal2.tpl");
- $tpl3 = $smarty->fetch("internal3.tpl");
-
- $smarty->assign("tpl1_contents",$tpl1);
- $smarty->assign("tpl2_contents",$tpl2);
- $smarty->assign("tpl3_contents",$tpl3);
-
- $smarty->caching = false;
- $smarty->display('index.tpl');
-
- index.tpl
- ---------
-
- <table>
- <tr>
- <td>{$tpl1_contents}</td>
- <td>{$tpl2_contents}</td>
- <td>{$tpl3_contents}</td>
- </tr>
- </table>
-
-
-
-
- Another approach:
-
- You could write a custom insert function to fetch your internal
- templates:
-
- <table>
- <tr>
- <td>{insert name=fetch_tpl tpl="internal1.tpl"}</td>
- <td>{insert name=fetch_tpl tpl="internal2.tpl"}</td>
- <td>{insert name=fetch_tpl tpl="internal3.tpl"}</td>
- </tr>
- </table>
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