Ruby on Rails
PHPControlStructures (Version #4)

PHP control structures and their ruby equivalents:

PHP’s “if”, “else” and “elseif”




<?php
if ($a > $b) {
   echo "a is bigger than b";
}
elseif ($b > a) {
   echo "b is bigger than a";
}
else {
   echo "a is equal to b";
}
?>

Ruby’s “if”, “elsif” and “else”




if a > b
   puts "a is bigger than b"
elsif b > a
   puts "b is bigger than a"
else
   puts "a is equal to b"
end

PHP’s while, do-while, for and foreach




<?php
while($a < 4) {
    echo $a++;
}
do {

  echo a++;

} while($a < 4);
for($a = 0; $a < 4; $a++) {

   echo $a;

}
$arr = array(

   “one” => 1,

   “two” => 2,

   “three” => 3,

   “seventeen” => 17

);
foreach ($arr as $key => $value) {

   echo “\$arr[$key] => $value.\n”;

}

?>

Ruby’s .time do, while, begin-end-until, for and .each do




4.times do
   puts a+=1
end
while a < 4 do

    puts a += 1

end
begin

    puts a += 1

end while a < 4
arr = {"one" => 1,

    “two” => 2,

    “three” => 3,

    “seventeen” => 17 }
for key in arr.keys

    puts “[#{key}] => #{arr[key]}”

end
arr.each do |key, value|

    puts “arr[#{key}] => #{value}”

end