3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = array('a' => 'ert', 'b' => 'rzz', 'c' => 'tt', 'd' => '', 'e' => '', ); $bar = array('a' => 'foo', 'd' => 'foo', ); $merged = array_merge($foo, $bar); var_dump($merged);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(5) { ["a"]=> string(3) "foo" ["b"]=> string(3) "rzz" ["c"]=> string(2) "tt" ["d"]=> string(3) "foo" ["e"]=> string(0) "" }

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