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https://github.com/friendica/friendica
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109 lines
4.4 KiB
Text
109 lines
4.4 KiB
Text
= Known incompatibilities with Smarty 2 =
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== Syntax ==
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Smarty 3 API has a new syntax. Much of the Smarty 2 syntax is supported
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by a wrapper but deprecated. See the README that comes with Smarty 3 for more
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information.
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The {$array|@mod} syntax has always been a bit confusing, where an "@" is required
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to apply a modifier to an array instead of the individual elements. Normally you
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always want the modifier to apply to the variable regardless of its type. In Smarty 3,
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{$array|mod} and {$array|@mod} behave identical. It is safe to drop the "@" and the
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modifier will still apply to the array. If you really want the modifier to apply to
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each array element, you must loop the array in-template, or use a custom modifier that
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supports array iteration. Most smarty functions already escape values where necessary
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such as {html_options}
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== PHP Version ==
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Smarty 3 is PHP 5 only. It will not work with PHP 4.
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== {php} Tag ==
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The {php} tag is disabled by default. The use of {php} tags is
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deprecated. It can be enabled with $smarty->allow_php_tag=true.
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But if you scatter PHP code which belongs together into several
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{php} tags it may not work any longer.
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== Delimiters and whitespace ==
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Delimiters surrounded by whitespace are no longer treated as Smarty tags.
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Therefore, { foo } will not compile as a tag, you must use {foo}. This change
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Makes Javascript/CSS easier to work with, eliminating the need for {literal}.
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This can be disabled by setting $smarty->auto_literal = false;
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== Unquoted Strings ==
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Smarty 2 was a bit more forgiving (and ambiguous) when it comes to unquoted strings
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in parameters. Smarty3 is more restrictive. You can still pass strings without quotes
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so long as they contain no special characters. (anything outside of A-Za-z0-9_)
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For example filename strings must be quoted
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<source lang="smarty">
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{include file='path/foo.tpl'}
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</source>
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== Extending the Smarty class ==
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Smarty 3 makes use of the __construct method for initialization. If you are extending
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the Smarty class, its constructor is not called implicitly if the your child class defines
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its own constructor. In order to run Smarty's constructor, a call to parent::__construct()
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within your child constructor is required.
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<source lang="php">
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class MySmarty extends Smarty {
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function __construct() {
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parent::__construct();
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// your initialization code goes here
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}
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}
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</source>
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== Autoloader ==
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Smarty 3 does register its own autoloader with spl_autoload_register. If your code has
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an existing __autoload function then this function must be explicitly registered on
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the __autoload stack. See http://us3.php.net/manual/en/function.spl-autoload-register.php
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for further details.
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== Plugin Filenames ==
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Smarty 3 optionally supports the PHP spl_autoloader. The autoloader requires filenames
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to be lower case. Because of this, Smarty plugin file names must also be lowercase.
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In Smarty 2, mixed case file names did work.
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== Scope of Special Smarty Variables ==
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In Smarty 2 the special Smarty variables $smarty.section... and $smarty.foreach...
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had global scope. If you had loops with the same name in subtemplates you could accidentally
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overwrite values of parent template.
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In Smarty 3 these special Smarty variable have only local scope in the template which
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is defining the loop. If you need their value in a subtemplate you have to pass them
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as parameter.
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<source lang="smarty">
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{include file='path/foo.tpl' index=$smarty.section.foo.index}
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</source>
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== SMARTY_RESOURCE_CHAR_SET ==
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Smarty 3 sets the constant SMARTY_RESOURCE_CHAR_SET to utf-8 as default template charset.
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This is now used also on modifiers like escape as default charset. If your templates use
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other charsets make sure that you define the constant accordingly. Otherwise you may not
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get any output.
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== newline at {if} tags ==
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A \n was added to the compiled code of the {if},{else},{elseif},{/if} tags to get output of newlines as expected by the template source.
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If one of the {if} tags is at the line end you will now get a newline in the HTML output.
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== trigger_error() ==
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The API function trigger_error() has been removed because it did just map to PHP trigger_error.
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However it's still included in the Smarty2 API wrapper.
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== Smarty constants ==
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The constants
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SMARTY_PHP_PASSTHRU
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SMARTY_PHP_QUOTE
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SMARTY_PHP_REMOVE
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SMARTY_PHP_ALLOW
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have been replaced with class constants
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Smarty::PHP_PASSTHRU
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Smarty::PHP_QUOTE
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Smarty::PHP_REMOVE
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Smarty::PHP_ALLOW
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