new files

Task/Binary-search/PHP/binary-search-1.php

@@ -0,0 +1,19 @@
+function binary_search( $array, $secret, $start, $end )
+{
+        do
+        {
+                $guess = (int)($start + ( ( $end - $start ) / 2 ));
+
+                if ( $array[$guess] > $secret )
+                        $end = $guess;
+
+                if ( $array[$guess] < $secret )
+                        $start = $guess;
+
+                if ( $end < $start)
+                        return -1;
+
+        } while ( $array[$guess] != $secret );
+
+        return $guess;
+}