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src/Link/Diff.php (2 issues)

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<?php
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namespace Cocur\Chain\Link;
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use Cocur\Chain\Chain;
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/**
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 * Diff.
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 *
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 * @author    Florian Eckerstorfer
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 * @copyright 2015 Florian Eckerstorfer
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 */
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trait Diff
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{
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    /**
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     * Computes the difference of arrays.
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     *
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     * Compares the array to another array or instance of `Cocur\Chain\Chain` and will set the array of elements that
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     * are not present in the other array.
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     *
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     * @param Chain|array $array2 An array or instance of `Cocur\Chain\Chain` to compare against.
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     *
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     * @return Chain
0 ignored issues
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Should the return type not be Diff?

This check compares the return type specified in the @return annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch.

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     */
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    public function diff($array2)
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    {
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        $this->array = array_diff(
0 ignored issues
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The property array does not exist. Did you maybe forget to declare it?

In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:

class MyClass { }

$x = new MyClass();
$x->foo = true;

Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion:

class MyClass {
    public $foo;
}

$x = new MyClass();
$x->foo = true;
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            $this->array,
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            $array2 instanceof Chain ? $array2->array : $array2
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        );
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        return $this;
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    }
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}
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