Error Identifier: variable.undefined
Every error reported by PHPStan has an error identifier. Here’s a list of all error identifiers. In PHPStan Pro you can see the error identifier next to each error and filter errors by their identifiers.
Code example #
<?php declare(strict_types = 1);
function greet(): string
{
return 'Hello, ' . $name;
}
Why is it reported? #
The variable being used has not been defined in the current scope. This usually means the variable name is misspelled, the variable was intended to be a parameter, or the code path that assigns the variable is not always reached.
How to fix it #
Make sure the variable is defined before it is used.
<?php declare(strict_types = 1);
-function greet(): string
+function greet(string $name): string
{
return 'Hello, ' . $name;
}
If the variable might not be defined depending on the code path, assign a default value:
<?php declare(strict_types = 1);
function summarize(bool $verbose): string
{
+ $detail = '';
if ($verbose) {
$detail = 'Full details here';
}
return $detail;
}
How to ignore this error #
You can use the identifier variable.undefined to ignore this error using a comment:
// @phpstan-ignore variable.undefined
codeThatProducesTheError();You can also use only the identifier key to ignore all errors of the same type in your configuration file in the ignoreErrors parameter:
parameters:
ignoreErrors:
-
identifier: variable.undefined