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@ 2013-03-22T07:27:31Z

<?php
 $itinerary = array (array('portName'=>'Day At Sea'), array('portName'=>'Moscow'));
                    $badPorts = array('At Sea', 'Day At Sea', 'Cruising The Mediterranean Sea');
$image = '';
$index = 0;
                    $image .= implode(',', array_reduce($itinerary, function ($result, $item) use ($badPorts, &$index){
                                                            if(!in_array($item['portName'], $badPorts)) $result[$index] = $item['portName'];
                        $index++;
                                                               return $result;
                                                        }, array()));

var_dump($image);

$image2 = '';
array_walk($image2, function($item, $index) use(&$image, &$index, $badPorts){
    if(!in_array($item['portName'], $badPorts)) $result[$index] = $item['portName'];
    $index++;
});
var_dump($image2);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Cannot use lexical variable $index as a parameter name in /in/JIXWn on line 15
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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