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PHP PHP Arrays and Control Structures PHP Loops For Looping

Posted by Kohane Kagami
Kohane Kagami
12,390 Points

What's wrong with my code?

Here is the problem. "Use the function isset to test if the incremented value equals one of the keys in the $facts array. If there is a key that matches, display the value after the number." and here is my code. 

<?php
$facts = array(
    57 => ' on Heinz ketchup bottles represents the number of varieties of pickles the company once had.',
    2 => ' is the approximate hours a day Giraffes sleeps',
    18 => ' is the average hours a Python sleeps per day',
    10 => ' per cent of the world is left-handed.',
    11 => ' Empire State Buildings, stacked one on top of the other, would be required to measure the Gulf of Mexico at its deepest point.',
    98 => '% of the atoms in your body are replaced every year',
    69 => ' is the largest number of recorded children born to one woman',
);
//add your loop below this line
for ($i=1; $i<=100; $i++){
  for($j=0; $j<=6; $j++){
   if(isset($i)==key($facts[j])){
   echo $facts[j];
   } 
  }
}

What's wrong with my code?

2 Answers

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

isset($i) will always return true because $i always exists inside the loop as the loop variable. If you want to check that the key exists with a corresponding value you should check $facts[$i] with isset.

<?php
//...
for ($i=1; $i<=100; $i++){
   if(isset($facts[$i]) {
     echo $i + " " + $facts[$i] + "\n";
  }
}
?>
Kohane Kagami
Kohane Kagami
12,390 Points

Thank you very much :)

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

I am rather new to PHP, but these are two possible errors (I'm not sure if this will fix it because like I said I'm new to PHP):

  • You are missing the closing "?>" tag.
  • you don't need the dollar sign for the "i" and "j" variables.

Like what I said, these might not be the things that are causing the error. If those are the errors, then this should work:

<?php
$facts = array(
    57 => ' on Heinz ketchup bottles represents the number of varieties of pickles the company once had.',
    2 => ' is the approximate hours a day Giraffes sleeps',
    18 => ' is the average hours a Python sleeps per day',
    10 => ' per cent of the world is left-handed.',
    11 => ' Empire State Buildings, stacked one on top of the other, would be required to measure the Gulf of Mexico at its deepest point.',
    98 => '% of the atoms in your body are replaced every year',
    69 => ' is the largest number of recorded children born to one woman',
);
//add your loop below this line
for (i=1; i<=100; i++){
  for(j=0; j<=6; j++){
   if(isset(i)==key($facts[j])){
   echo $facts[j];
   } 
  }
}

?>

Hope this helps! ~Alex