NestedNotOperators

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Group: Code style · PhpStorm name: NestedNotOperatorsInspection

Stacking logical-not operators (!!$x, !!!$x) is a cryptic way to write a boolean cast or a single negation. An even number of ! is a (bool) cast, an odd number is one !.

Example

Before

<?php
$ok   = !!$token;
$off  = !!!$token;
$six  = !!!!!!$token;
$both = !!($m > $n);
$neg  = !!! ($p instanceof Item);
$wrap = !( !(count($list)) );
$deep = !(!(!(($flag))));
$one  = !$token;

After fix

<?php
$ok   = (bool)$token;
$off  = !$token;
$six  = (bool)$token;
$both = (bool)($m > $n);
$neg  = !($p instanceof Item);
$wrap = (bool)count($list);
$deep = !$flag;
$one  = !$token;

Reported:

• line 2: Simplify the stacked negations to '(bool)$token'.
• line 3: Simplify the stacked negations to '!$token'.
• line 4: Simplify the stacked negations to '(bool)$token'.
• line 5: Simplify the stacked negations to '(bool)($m > $n)'.
• line 6: Simplify the stacked negations to '!($p instanceof Item)'.
• line 7: Simplify the stacked negations to '(bool)count($list)'.
• line 8: Simplify the stacked negations to '!$flag'.

Configure

In custos.json:

{
  "rules": {
    "NestedNotOperators": {
      "enabled": false
    }
  }
}

Suppress

Before the statement or declaration (or the first statement of the file), either of:

// @custos-ignore NestedNotOperators

/**
 * @noinspection NestedNotOperatorsInspection
 */