   #PHP Manual Operators String Operators Control Structures

             PHP Manual
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Array Operators

   The only array operator in PHP is the + operator. It appends the right
   handed array to the left handed, whereas duplicated keys are NOT
   overwritten.

   <?php
   $a = array("a" => "apple", "b" => "banana");
   $b = array("a" =>"pear", "b" => "strawberry", "c" => "cherry");
   $c = $a + $b;
   var_dump($c);
   ?>

   When executed, this script will print the following:
   array(3) {
     ["a"]=>
     string(5) "apple"
     ["b"]=>
     string(6) "banana"
     ["c"]=>
     string(6) "cherry"
   }

   See also the manual sections on the Array type and Array functions.
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