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@ 2015-01-27T22:19:52Z

<?php
$categories = array("MainCategory" => array(0,0,0), 'SubCategory' => array(1,7,7,7,7,1), 'Keyword' => array());
            $mainArray = $categories['MainCategory'];
            $subArray = $categories['SubCategory'];
            $keyArray = $categories['Keyword'];

            if (count($mainArray) === 0) {
            	$mainArray = array("");
            }
            if (count($subArray) === 0) {
            	$subArray = array("");
            }
            if (count($keyArray) === 0) {
            	$keyArray = array('lastname', 'email', 'phone');
            }
            foreach ($subArray  as $subcat) {
                foreach ($mainArray as $cat) {
                    foreach ($keyArray as $keys) {
                        echo $cat;
                        echo $subcat;
                        echo implode(',',$keys);
                    }
                }

            }

Output for git.master, git.master_jit, rfc.property-hooks: 01 Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /in/qJJTN:21 Stack trace: #0 /in/qJJTN(21): implode(',', 'lastname') #1 {main} thrown in /in/qJJTN on line 21
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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