class Emergency {
  const Fire = 0;
  const Flood = 1;
  const NoMilkInFridge = 2;
}

$value = 0; // this is an example of the data you might have

$refl = new ReflectionClass('Emergency');
$enum = $refl->getConstants(); // returns array. key is string, value is integer.
$key = array_keys($enum, $value);
$name = $key[0]; // you now have "Flood"

Proper enumerations in PHP are hard to come by. This uses a class as a pseudo enumeration. Sometimes you'll want to lookup the string name side of the enum when you have the value (ie, you have "1" and you want the string "Flood").

PHP Enumeration Constant Reflection

php

PHP