[Bug] False positive list(array.illegal_offset_type/undefined-variable/unused-variable)

[algo13]

<?php
class C
{
    // Notice:  Illegal array offset type unknown for key $key. [array.illegal_offset_type]
    public function testForeach(array $ary)
    {
        foreach ($ary as $key => $value) {
            $ary[$key] = 1;
        }
    }
    // Notice:  You are trying to use an undefined variable $_SERVER [undefined-variable]
    public function testUndefinedSuperglobals($subject)
    {
        sprintf('%s', implode(' ', $_SERVER['argv']));
    }
    // Warning:  Unused variable $var in method testUnusedInIssetInFetch() [unused-variable]
    public function testUnusedInIssetInFetch(array $ary)
    {
        $var = 0;
        isset($ary[$var]);
    }
    // Warning:  Unused variable $thisClass in method testUnusedInNewOp() [unused-variable]
    public function testUnusedInNewOp($value)
    {
        $thisClass = get_class($this);
        return new $thisClass($value);
    }
}

[ovr]

Fixed this issue:

    // Notice:  You are trying to use an undefined variable $_SERVER [undefined-variable]
    public function testUndefinedSuperglobals($subject)
    {
        sprintf('%s', implode(' ', $_SERVER['argv']));
    }

refs 64a2881

[ovr]

Fix isssue with the code above:

    public function testUnusedInIssetInFetch(array $ary)
    {
        $var = 0;
        isset($ary[$var]);
    }

refs be44673

[ovr]

Fix issue for code

    // Warning:  Unused variable $thisClass in method testUnusedInNewOp() [unused-variable]
    public function testUnusedInNewOp($value)
    {
        $thisClass = get_class($this);
        return new $thisClass($value);
    }

refs 8bad524

[ovr]

Fix issue for code:

    // Notice:  Illegal array offset type unknown for key $key. [array.illegal_offset_type]
    public function testForeach(array $ary)
    {
        foreach ($ary as $key => $value) {
            $ary[$key] = 1;
        }
    }

refs 3200a40

[ddmler]

@ovr binaryop\coalesce has same error as isset had.

[ovr]

@ovr binaryop\coalesce has same error as isset had.

@ddmler can you please provide a PR/fix for it?

Thanks

[algo13]

@ovr Thank you for many fixed !!
@ddmler This issue contained many issues.
To avoid confusion in the history, moved the remaining two issues.(#313, #314)