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PHP PHP Arrays and Control Structures PHP Loops For Looping

Posted by Adnan MERRAKCHI
Adnan MERRAKCHI
2,546 Points

help plz i don't know how can i use isset to check the key

help!!

index.php 
<?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',
);

for($i=1 ; $i <= 100 ; $i++){
  echo $i ;
}

if(isset()){
}
//add your loop below this line

1 Answer

Matthew Bilz
Matthew Bilz
15,829 Points
Matthew Bilz
Matthew Bilz
15,829 Points

Hi there,

Here's what your loop should look like:

for($i = 1; $i <= 100; $i++) {
  if(isset($facts[$i])) {
    echo $i . $facts[$i];
  } else {
  echo $i;
  }
}

The isset function is checking to see if there is a match for the numerical key value for wherever $i is at in the loop at that time. If it finds a match, we echo out the number, THEN the value of the array item as per the instructions. Otherwise, if the $i value is not part of the array's keys, it skips over the first statement and heads directly to your else statement to echo out simply $i. I hope this helps!