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Add note to docs about plugins that expect parameters by reference

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Simon Wisselink
2024-12-27 23:08:17 +01:00
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docs/upgrading.md
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@ -49,6 +49,11 @@ $smarty->registerPlugin('modifier', 'my_special_func', 'my_special_func');
But you may want to consider writing a proper [extension](api/extending/extensions.md).
#### Passing parameters by reference
You cannot use plugins that expect a parameter by reference anymore. PHP-function such as `reset()`, `prev()`,
`next()` and `end()` can be registered as plugin, but they won't work because they expect a parameter by
reference and Smarty will try to pass it by value.
### Removed undocumented tags
Smarty 4 still supported some tags that have been carried over from previous version, but have never been documented.