Online PHP editor | output for UvYaH

@ 2017-10-05T17:13:09Z

<?php

class Test
{
    public function foo()
    {
        $x = ['foo', 'bar'];
        // The actual operation isn't important, just need to do something to turn the literal
        // strings into refcounted strings
        var_dump(__LINE__);
        debug_zval_dump($x[0]);
        $y = array_map(function($it) { return $it.$it; }, $x);
        var_dump(__LINE__);
        debug_zval_dump($x[0]);
        debug_zval_dump($y[0]);
        return array_unique($y, SORT_STRING);
    }
}

$result = (new Test())->foo();
var_dump(__LINE__);
debug_zval_dump($result[0]);
debug_zval_dump($result[1]);
var_dump($result);

Output for 5.6.0 - 5.6.40, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8: int(10) string(3) "foo" refcount(2) int(13) string(3) "foo" refcount(2) string(6) "foofoo" refcount(2) int(21) string(6) "foofoo" refcount(2) string(6) "barbar" refcount(2) array(2) { [0]=> string(6) "foofoo" [1]=> string(6) "barbar" }
Output for 7.0.0 - 7.0.33: int(10) string(3) "foo" refcount(3) int(13) string(3) "foo" refcount(3) string(6) "foofoo" refcount(2) int(21) string(6) "foofoo" refcount(2) string(6) "barbar" refcount(2) array(2) { [0]=> string(6) "foofoo" [1]=> string(6) "barbar" }

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