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  1. <?php 
  2.     function convert($keyword) {
  3.        $wResult = preg_replace('/([[:lower:][:digit:]])?([[:upper:]]+)/u','$1 $2', $keyword);
  4.        return $wResult;
  5.     }
  6.  
  7.  $search_keyword = array(
  8.             "comeHEREtomorrow",
  9.             "KissYouTODAY",
  10.             "comeÜndeHere",
  11.             "NEVERSAYIT",
  12.             "2013willCome",
  13.             "Before2013ends",
  14.             "IKnowThat",
  15.             "#whatiknow"
  16.         );
  17.         $need_keyword = array(
  18.             "come HERE tomorrow",
  19.             "Kiss You TODAY",
  20.             "come Ünde Here",
  21.             "NEVERSAYIT",
  22.             "2013 will Come",
  23.             "Before 2013 ends",
  24.             "I Know That",
  25.             "# whatiknow"
  26.         );     
  27.  
  28.         foreach ($search_keyword as $key => $w) {
  29.             $wExpected = $need_keyword[$key];
  30.  
  31.             $wResult = convert($w);
  32.  
  33.             $check = strcmp($wExpected, $wResult);
  34.             $checkWord = ( $check == 0 ? "SUCCESS" : "FAILURE" );
  35.  
  36.             echo "try $key,\t keyword: \"$w\" expected: \"$wExpected\" result: \"$wResult\" check: $check ($checkWord),\n";
  37.         }
  38. ?>
Success #stdin #stdout 0.02s 13064KB
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stdin
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Standard input is empty
stdout
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try 0,	 keyword: "comeHEREtomorrow" expected: "come HERE tomorrow" result: "come HEREtomorrow" check: -1 (FAILURE),
try 1,	 keyword: "KissYouTODAY" expected: "Kiss You TODAY" result: " Kiss You TODAY" check: 1 (FAILURE),
try 2,	 keyword: "comeÜndeHere" expected: "come Ünde Here" result: "comeÜnde Here" check: -1 (FAILURE),
try 3,	 keyword: "NEVERSAYIT" expected: "NEVERSAYIT" result: " NEVERSAYIT" check: 1 (FAILURE),
try 4,	 keyword: "2013willCome" expected: "2013 will Come" result: "2013will Come" check: -1 (FAILURE),
try 5,	 keyword: "Before2013ends" expected: "Before 2013 ends" result: " Before2013ends" check: 1 (FAILURE),
try 6,	 keyword: "IKnowThat" expected: "I Know That" result: " IKnow That" check: 1 (FAILURE),
try 7,	 keyword: "#whatiknow" expected: "# whatiknow" result: "#whatiknow" check: -1 (FAILURE),
https://ideone.com/9gajZ8
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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