1.2.1361. Use is_countable

is_countable() checks if a variables holds a value that can be counted. It is recommended to use it before calling count().

is_countable() accepts arrays and object whose class implements `countable <https://www.php.net/countable>`_.

<?php

function foo($arg) {
    if (!is_countable($arg)) {
        // $arg cannot be passed to count()
        return 0
    }
    return count($arg);
}

function bar($arg) {
    if (!is_array($arg) and !$x instanceof \Countable) {
        // $arg cannot be passed to count()
        return 0
    }

    return count($arg);
}

?>

See also PHP RFC: is_countable.

1.2.1361.1. Connex PHP features

• array

• countable

1.2.1361.1.1. Suggestions

• Use is_countable()

• Create a compatibility function that replaces is_countable() until the code is ready for PHP 7.3

1.2.1361.1.2. Specs

Short name	Php/CouldUseIsCountable
Rulesets	All, Changed Behavior, Suggestions
Exakat since	1.3.8
PHP Version	With PHP 7.3 and more recent
Severity
Time To Fix
Precision	High
Available in	Entreprise Edition, Exakat Cloud