Code Inspection: Strict type checking rules violation

Reports violations of the strict type checking rules.

In strict mode, only the variables exactly matching the declaration types are accepted. Strict type-checking mode can be enabled:

• Per file, if the declare(strict_types=1) directive is specified. The directive must be the first statement in a file, block mode is explicitly disallowed.

• For all files, if the Enable for all files inspection option is enabled.

See Strict typing (php.net) for details.

In the following example, the expectString() function has the parameter of the string type but is called with an int argument.

function expectString(string $str) {
    return $str;
}

expectString(42);