Invalid symbol in group `use` statementPHP-W1072

A constant/function/class that you are trying to use in group use statement could not be resolved. This would result in an error during the runtime.

This can happen because of human errors such as:

• The symbol does not exist therefore cannot be found.
• The namespace from which the symbol is being imported is invalid.
• There is a typo in the use statement.

Bad practice

namespace Utils;

define('Utils\PHP_73', 70300);
define('Utils\PHP_74', 70400);

function php_80(): int
{
    return 80000;
}

class Version
{
    public static function php72(): int
    {
        return 70200;
    }
}

namespace App;

use function Utils\{php_80, php_81};
use const Utils\{PHP_73, PHP74};

echo php_80();
echo php_81(); // "php_81" function doesn't exist

echo PHP_73;
echo PHP74; // typo, "PHP74" constant doesn't exist

echo Version::php72(); // invalid: "Version" class doesn't exist in "App" namespace

Recommended

namespace Utils;

define('Utils\PHP_73', 70300);
define('Utils\PHP_74', 70400);

function php_80(): int
{
    return 80000;
}

function php_81(): int
{
    return 80100;
}

class Version
{
    public static function php72(): int
    {
        return 70200;
    }
}

namespace App;

use function Utils\{php_80, php_81};
use const Utils\{PHP_73, PHP_74};
use Utils\Version; // require class from valid namespace using "use" keyword

echo php_80();
echo php_81();

echo PHP_73;
echo PHP_74;

echo Version::php72();

References

• Group use declarations.
• Namespaces overview.
• use Keyword.