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@ 2013-03-22T08:08:05Z

<?php
$itinerary = array (array('portName'=>'Day At Sea'), array('portName'=>'Moscow'), array('portName'=>'Jupiter'));
$badPorts = array('At Sea', 'Day At Sea', 'Cruising The Mediterranean Sea');

$image = '';
$arr = array();
array_walk($itinerary, function($item, $index) use($badPorts, &$arr){
	if(!in_array($item['portName'], $badPorts)) $arr[] = $index.":".$item['portName'];
});
$image .= implode(',', $arr);
var_dump($image);

$image2 = '';
$arr2 = array();
foreach($itinerary as $index => $item){
	if(!in_array($item['portName'], $badPorts)) $arr2[] = $index.":".$item['portName'];
}
$image2 .= implode(',', $arr2);
var_dump($image2);

$index = 0;
$image3 = implode(',', array_reduce($itinerary, function ($result, $item) use(&$index) {
    if(!in_array($item['portName'], $badPorts)) $result[] = $index.":".$item['portName'];
 return $result;
}, array()));
var_dump($image3);

Output for git.master, git.master_jit, rfc.property-hooks: string(18) "1:Moscow,2:Jupiter" string(18) "1:Moscow,2:Jupiter" Warning: Undefined variable $badPorts in /in/pXiNj on line 23 Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /in/pXiNj:23 Stack trace: #0 /in/pXiNj(23): in_array('Day At Sea', NULL) #1 [internal function]: {closure}(Array, Array) #2 /in/pXiNj(22): array_reduce(Array, Object(Closure), Array) #3 {main} thrown in /in/pXiNj on line 23
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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