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33 lines
542 B
Markdown
33 lines
542 B
Markdown
# DuplicateClass
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Emitted when a class is defined twice
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```php
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<?php
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class A {}
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class A {}
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```
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## Why this is bad
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The above code won’t compile.
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PHP does allow you to define a class conditionally:
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```php
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<?php
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if (rand(0, 1)) {
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class A {
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public function __construct(string $s) {}
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}
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} else {
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class A {
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public function __construct(object $o) {}
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}
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}
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```
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But Psalm _really_ doesn't want you to use this pattern – it's impossible for Psalm to know (without using reflection) which class is getting used.
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