Added solution for ProjectEuler/025: php, ruby

ProjectEuler/025/solve.php

@@ -0,0 +1,13 @@
+<?php
+define('DIGITS',1000);
+
+$current = 1;
+$prev = 1;
+$term = 2;
+while(strlen($current) < DIGITS) {
+	$term++;
+	$next = bcadd($current,$prev);
+	$prev = $current;
+	$current = $next;
+}
+echo $term;