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@ 2018-10-25T23:21:08Z

<?php

$vars = ['len' => '-1',
  'start' => '0',
  'cNum' => '7',
  'cSearch_0' => 'b',
  'cSearch_1' => 'c',
  'cSearch_2' => 'd',
  'cSearch_3' => 'e',
  'cSearch_4' => 'f',
  'cSearch_5' => 'g',
  'cSearch_6' => 'h'];
  
  
//   $v = preg_grep('/[cSearch]\_/', array_keys($vars));
  
  $cSearch = array_filter($vars, function($k){ return preg_match('/(cSearch)/',$k);}, ARRAY_FILTER_USE_KEY);
  var_dump($cSearch);

if(!empty($cSearch)){
                $searchColOutStr = ',searchCols: [';
                $searchColOut = [];
                for ($i = 0; $i < $vars['cNum']; $i++){
                    if(array_key_exists('cSearch_' . $i, $cSearch)){
                        $searchColOut[] = '{ "search": "' . $cSearch['cSearch_' . $i] . '"}';
                    }else{
                        $searchColOut[] = 'null';
                    }
                }
                $searchColOutStr .= implode(',', $searchColOut);
                $searchColOutStr .= ']';
            }
            
var_dump($searchColOutStr);

Output for git.master, git.master_jit, rfc.property-hooks: array(7) { ["cSearch_0"]=> string(1) "b" ["cSearch_1"]=> string(1) "c" ["cSearch_2"]=> string(1) "d" ["cSearch_3"]=> string(1) "e" ["cSearch_4"]=> string(1) "f" ["cSearch_5"]=> string(1) "g" ["cSearch_6"]=> string(1) "h" } string(133) ",searchCols: [{ "search": "b"},{ "search": "c"},{ "search": "d"},{ "search": "e"},{ "search": "f"},{ "search": "g"},{ "search": "h"}]"

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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