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<?php $a = array('a' => 'one', 'b' => 'two'); $b=array('a' => 'three', 'b' => 'four', 'c' => 'five'); //not a union of arrays' values echo '$a + $b : '; print_r ($a + $b); //a union of arrays' values echo "array_unique(array_merge($a,$b)):"; // cribbed from http://oreilly.com/catalog/progphp/chapter/ch05.html print_r (array_unique(array_merge($a,$b)));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
$a + $b : Array ( [a] => one [b] => two [c] => five ) Warning: Array to string conversion in /in/o5h63 on line 10 Warning: Array to string conversion in /in/o5h63 on line 10 array_unique(array_merge(Array,Array)):Array ( [a] => three [b] => four [c] => five )
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
$a + $b : Array ( [a] => one [b] => two [c] => five ) Notice: Array to string conversion in /in/o5h63 on line 10 Notice: Array to string conversion in /in/o5h63 on line 10 array_unique(array_merge(Array,Array)):Array ( [a] => three [b] => four [c] => five )
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, 7.3.32 - 7.3.33
$a + $b : Array ( [a] => one [b] => two [c] => five ) array_unique(array_merge(Array,Array)):Array ( [a] => three [b] => four [c] => five )

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