Testing PHP Continued

Some of the functions I have been learning for loops, arrays, if statements:

What to do next: Parsing RSS/XML files through similiar functions as to bellow using variables from the RSS file:

= 0){
 echo "
counter is zero or greater
";
}
else{
 echo "
counter is less than zero
";
}
//this is a test for a loop, in whicch it adds one to the counter untill it reaches four
while($counter < 4){
 $counter=$counter+1;
 echo "
I now have $counter bits of paper
";
 if ($counter == 2){
  echo "
";
 }
}

//this is a test for displaying an image depending on the time, if after 6pm display a night image, if not display a day image 
if ($current_time >= 18){
 echo "
";
}
else{
 echo "
";
}
//printing an element in an array in this case $food
//echo $food[1];
//echo $food[$foodarraycounter];
while($foodarraycounter<4){
 //echo $food[$foodarraycounter];
 if($food[$foodarraycounter]=="soup"){
  //echo "working";
  echo "
";
 }
 // if the food array counter corresponds to orange print the image 
 if($food[$foodarraycounter]=="orange"){
  echo "
";
 }
 // this is the loop function in which it pluses one untill it reaches the parameters of the if statement and prints the corresponding image
 $foodarraycounter=$foodarraycounter+1;
}
  
?>