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PHP PHP Arrays and Control Structures PHP Loops For Looping

Posted by Nyasha Masunda
Nyasha Masunda
10,454 Points

Use the function isset to test if the incremented value equals one of the keys in the $facts array. If there is a key th

for ($i = 1; $i <= 100; $i++) { echo $i . "\n"; if (isset($facts ["$i"])) { echo $i.$facts ["$i"];

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

1 Answer

Samuel Zhen
Samuel Zhen
33,571 Points
Samuel Zhen
Samuel Zhen
33,571 Points

Try these

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

You can't echo $i before the if statement because if you do, php will echo it out first before do the checking.

Also, if you want to echo out an element from an array with the key that stored in a variable, don't put it in a quote.

echo $facts[$i];

If you put it in a quote, php will literally be searching for a key with the string "$i" instead of the value of that variable.

Hope it helps.