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run code in 150+ php & hhvm versions
Bugs & Features
<?php $names = ['Alice', 'Bob', 'Charlie', 'Alice', 'Dave', 'Alice']; class Name { public $name; public $id; public function __construct($name, $id = 0) { $this->name = $name; $this->id = $id; } } function contains(array $list, $item) { foreach ($list as $test) { if ($item->name == $test->name) { return true; } } return false; } // Transform strings -> objects $mappedNames = array_map(function($name) { return new Name($name); }, $names); // Deduplicate list $reducedNames = array_reduce($mappedNames, function($carry, $item) { if (contains($carry, $item)) { return $carry; } return array_merge($carry, array($item)); }, []); $idNames = array_map(function($item, $id) { return new Name($item->name, $id); }, $reducedNames, range(1, count($reducedNames))); var_dump($idNames);
Output for 5.4.0 - 7.1.0
array(4) { [0]=> object(Name)#8 (2) { ["name"]=> string(5) "Alice" ["id"]=> int(1) } [1]=> object(Name)#9 (2) { ["name"]=> string(3) "Bob" ["id"]=> int(2) } [2]=> object(Name)#10 (2) { ["name"]=> string(7) "Charlie" ["id"]=> int(3) } [3]=> object(Name)#11 (2) { ["name"]=> string(4) "Dave" ["id"]=> int(4) } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/cdkbF on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/cdkbF on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/cdkbF on line 3
Process exited with code 255.