Dropped remaining references to removed PHP-support in Smarty 4 from docs, lexer and security class.

docs/programmers/api-variables/variable-php-handling.md

@@ -1,21 +0,0 @@
-\$php\_handling {#variable.php.handling}
-===============
-
-This tells Smarty how to handle PHP code embedded in the templates.
-There are four possible settings, the default being
-`Smarty::PHP_PASSTHRU`. Note that this does NOT affect php code within
-[`{php}{/php}`](#language.function.php) tags in the template.
-
--   `Smarty::PHP_PASSTHRU` - Smarty echos tags as-is.
-
--   `Smarty::PHP_QUOTE` - Smarty quotes the tags as html entities.
-
--   `Smarty::PHP_REMOVE` - Smarty removes the tags from the templates.
-
--   `Smarty::PHP_ALLOW` - Smarty will execute the tags as PHP code.
-
-> **Note**
->
-> Embedding PHP code into templates is highly discouraged. Use [custom
-> functions](#plugins.functions) or [modifiers](#plugins.modifiers)
-> instead.

docs/programmers/api-variables/variable-trusted-dir.md

@@ -5,4 +5,4 @@
 array of all directories that are considered trusted. Trusted
 directories are where you keep php scripts that are executed directly
 from the templates with
-[`{include_php}`](#language.function.include.php).
+[`{insert}`](#language.function.insert.php).