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psalm/docs/running_psalm/issues/DeprecatedConstant.md

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# DeprecatedConstant
Emitted when referring to a deprecated constant:
```php
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<?php
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class A {
/** @deprecated */
const FOO = 'foo';
}
echo A::FOO;
```
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## Why this is bad
The `@deprecated` tag is normally indicative of code that will stop working in the near future.
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## How to fix
Dont use the deprecated constant.