Online PHP editor | output for 4kqGt

@ 2018-09-19T04:33:35Z

<?php

error_reporting(-1);
ini_set('log_errors','Off');
ini_set('display_errors', 'On');

trait collision {

    public function collisionMethod()
    {
        echo "collision\n";
    }

    public function unusedMethod()
    {
        echo "unused\n";
    }
}

trait A {
    use collision;

    public function sayA()
    {
        $this->collisionMethod();
        echo "Aです\n";
    }
}

trait B {
    use collision;

    public function sayB()
    {
        $this->collisionMethod();
        echo "Bです\n";
    }
}

class User {
    use A;
    use B;
}

$user = new User;
$user->sayA();
$user->sayB();

Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13: collision Aです collision Bです
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34: Fatal error: Trait method collisionMethod has not been applied, because there are collisions with other trait methods on User in /in/4kqGt on line 40
Process exited with code 255.
Output for 5.6.0 - 5.6.40: Fatal error: Trait method collisionMethod has not been applied, because there are collisions with other trait methods on User in /in/4kqGt on line 43
Process exited with code 255.

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