3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var1 = array( "test1" => 1, "test2" => 2, ); $var2 = array( "test1" => 1, ); $var3 = $var1 + $var2; print_r($var3); ?>

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38.98 ms | 402 KiB | 5 Q