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| -rw-r--r-- | include/smarty/SMARTY_2_BC_NOTES.txt | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/include/smarty/SMARTY_2_BC_NOTES.txt b/include/smarty/SMARTY_2_BC_NOTES.txt new file mode 100644 index 000000000..79a2cb1b6 --- /dev/null +++ b/include/smarty/SMARTY_2_BC_NOTES.txt @@ -0,0 +1,109 @@ += Known incompatibilities with Smarty 2 = + +== Syntax == + +Smarty 3 API has a new syntax. Much of the Smarty 2 syntax is supported +by a wrapper but deprecated. See the README that comes with Smarty 3 for more +information. + +The {$array|@mod} syntax has always been a bit confusing, where an "@" is required +to apply a modifier to an array instead of the individual elements. Normally you +always want the modifier to apply to the variable regardless of its type. In Smarty 3, +{$array|mod} and {$array|@mod} behave identical. It is safe to drop the "@" and the +modifier will still apply to the array. If you really want the modifier to apply to +each array element, you must loop the array in-template, or use a custom modifier that +supports array iteration. Most smarty functions already escape values where necessary +such as {html_options} + +== PHP Version == +Smarty 3 is PHP 5 only. It will not work with PHP 4. + +== {php} Tag == +The {php} tag is disabled by default. The use of {php} tags is +deprecated. It can be enabled with $smarty->allow_php_tag=true. + +But if you scatter PHP code which belongs together into several +{php} tags it may not work any longer. + +== Delimiters and whitespace == +Delimiters surrounded by whitespace are no longer treated as Smarty tags. +Therefore, { foo } will not compile as a tag, you must use {foo}. This change +Makes Javascript/CSS easier to work with, eliminating the need for {literal}. +This can be disabled by setting $smarty->auto_literal = false; + +== Unquoted Strings == +Smarty 2 was a bit more forgiving (and ambiguous) when it comes to unquoted strings +in parameters. Smarty3 is more restrictive. You can still pass strings without quotes +so long as they contain no special characters. (anything outside of A-Za-z0-9_) + +For example filename strings must be quoted +<source lang="smarty"> +{include file='path/foo.tpl'} +</source> + +== Extending the Smarty class == +Smarty 3 makes use of the __construct method for initialization. If you are extending +the Smarty class, its constructor is not called implicitly if the your child class defines +its own constructor. In order to run Smarty's constructor, a call to parent::__construct() +within your child constructor is required. + +<source lang="php"> +class MySmarty extends Smarty { + function __construct() { + parent::__construct(); + + // your initialization code goes here + + } +} +</source> + +== Autoloader == +Smarty 3 does register its own autoloader with spl_autoload_register. If your code has +an existing __autoload function then this function must be explicitly registered on +the __autoload stack. See http://us3.php.net/manual/en/function.spl-autoload-register.php +for further details. + +== Plugin Filenames == +Smarty 3 optionally supports the PHP spl_autoloader. The autoloader requires filenames +to be lower case. Because of this, Smarty plugin file names must also be lowercase. +In Smarty 2, mixed case file names did work. + +== Scope of Special Smarty Variables == +In Smarty 2 the special Smarty variables $smarty.section... and $smarty.foreach... +had global scope. If you had loops with the same name in subtemplates you could accidentally +overwrite values of parent template. + +In Smarty 3 these special Smarty variable have only local scope in the template which +is defining the loop. If you need their value in a subtemplate you have to pass them +as parameter. +<source lang="smarty"> +{include file='path/foo.tpl' index=$smarty.section.foo.index} +</source> + +== SMARTY_RESOURCE_CHAR_SET == +Smarty 3 sets the constant SMARTY_RESOURCE_CHAR_SET to utf-8 as default template charset. +This is now used also on modifiers like escape as default charset. If your templates use +other charsets make sure that you define the constant accordingly. Otherwise you may not +get any output. + +== newline at {if} tags == +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. +If one of the {if} tags is at the line end you will now get a newline in the HTML output. + +== trigger_error() == +The API function trigger_error() has been removed because it did just map to PHP trigger_error. +However it's still included in the Smarty2 API wrapper. + +== Smarty constants == +The constants +SMARTY_PHP_PASSTHRU +SMARTY_PHP_QUOTE +SMARTY_PHP_REMOVE +SMARTY_PHP_ALLOW +have been replaced with class constants +Smarty::PHP_PASSTHRU +Smarty::PHP_QUOTE +Smarty::PHP_REMOVE +Smarty::PHP_ALLOW + |