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algb12/GraphDS

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src/Graph/DirectedGraph.php

Summary

Maintainability
A
55 mins
Test Coverage

Function removeVertex has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

    public function removeVertex($vertex)
    {
        if (empty($this->vertices[$vertex])) {
            throw new InvalidArgumentException("Vertex $vertex does not exist.");
        }
Severity: Minor
Found in src/Graph/DirectedGraph.php - About 55 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Avoid assigning values to variables in if clauses and the like (line '55', column '18').
Open

    public function removeVertex($vertex)
    {
        if (empty($this->vertices[$vertex])) {
            throw new InvalidArgumentException("Vertex $vertex does not exist.");
        }
Severity: Minor
Found in src/Graph/DirectedGraph.php by phpmd

IfStatementAssignment

Since: 2.7.0

Assignments in if clauses and the like are considered a code smell. Assignments in PHP return the right operand as their result. In many cases, this is an expected behavior, but can lead to many difficult to spot bugs, especially when the right operand could result in zero, null or an empty string and the like.

Example

class Foo
{
    public function bar($flag)
    {
        if ($foo = 'bar') { // possible typo
            // ...
        }
        if ($baz = 0) { // always false
            // ...
        }
    }
}

Source http://phpmd.org/rules/cleancode.html#ifstatementassignment

Avoid assigning values to variables in if clauses and the like (line '50', column '18').
Open

    public function removeVertex($vertex)
    {
        if (empty($this->vertices[$vertex])) {
            throw new InvalidArgumentException("Vertex $vertex does not exist.");
        }
Severity: Minor
Found in src/Graph/DirectedGraph.php by phpmd

IfStatementAssignment

Since: 2.7.0

Assignments in if clauses and the like are considered a code smell. Assignments in PHP return the right operand as their result. In many cases, this is an expected behavior, but can lead to many difficult to spot bugs, especially when the right operand could result in zero, null or an empty string and the like.

Example

class Foo
{
    public function bar($flag)
    {
        if ($foo = 'bar') { // possible typo
            // ...
        }
        if ($baz = 0) { // always false
            // ...
        }
    }
}

Source http://phpmd.org/rules/cleancode.html#ifstatementassignment

Avoid unused local variables such as '$vertex2Data'.
Open

            foreach ($vertex1Data as $vertex2 => $vertex2Data) {
Severity: Minor
Found in src/Graph/DirectedGraph.php by phpmd

UnusedLocalVariable

Since: 0.2

Detects when a local variable is declared and/or assigned, but not used.

Example

class Foo {
    public function doSomething()
    {
        $i = 5; // Unused
    }
}

Source https://phpmd.org/rules/unusedcode.html#unusedlocalvariable

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