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41 lines
634 B
Markdown
41 lines
634 B
Markdown
# InvalidArgument
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Emitted when a supplied function/method argument is incompatible with the method signature or docblock one.
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```php
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<?php
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class A {}
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function foo(A $a) : void {}
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/**
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* @param string $s
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*/
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function callFoo($s) : void {
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foo($s);
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}
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```
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## Why it’s bad
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Calling functions with incorrect values will cause a fatal error at runtime.
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## How to fix
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Sometimes this message can just be the result of an incorrect docblock.
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You can fix by correcting the docblock, or converting to a function signature:
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```php
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<?php
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class A {}
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function foo(A $a) : void {}
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function callFoo(A $a) : void {
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foo($a);
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}
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```
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