permit alph-numeric and fix unit test

class.TplBlock.php

@@ -31,9 +31,13 @@ class TplBlock {
   public function __construct($name = NULL){
     $this->name = $name;
 
+    if(!is_null($name) && !ctype_alnum($name)){
+      throw new InvalidTemplateException("Only alpha-numerics chars are allowed on the block name");
+      return false;
+    }
     $this->unusedRegex = '/'
                        . self::blockStartStart
-                       . ' *([a-z][a-z.]*) *'
+                       . ' *([a-z][a-z0-9.]*) *'
                        . self::blockStartEnd
                        . '(.*?)'
                        . self::blockEndStart
@@ -66,7 +70,6 @@ class TplBlock {
   }
 
   private function subBlockRegex($prefix, $blocName,$trim = true) {
-      echo "t".$trim;
     return '/'
          . self::blockStartStart
          . preg_quote($prefix . $blocName)

temp.txt

@@ -1 +0,0 @@
-Hello {{name}}

test/TplBlockTest.php

@@ -34,6 +34,7 @@ class TplBlockTest extends TestCase{
             )
           );
           $this->assertEquals("Hello Gnieark", $tpl->apply_tpl_file("temp.txt"));
+          unlink("temp.txt");
     }
 
     //test blocs
@@ -55,4 +56,21 @@ class TplBlockTest extends TestCase{
         $this->assertFalse(strpos("WONT",$str));
     }
 
+    //test if error on blocks names WTF
+    /**
+      * @expectedException InvalidTemplateException
+      */
+    public function testIfErrorOnForbiddenName(){
+        $tpl = new TplBlock("kjsd54 65");
+    }
+
+    //test if error on blocks names WTF
+    /**
+      * @expectedException InvalidTemplateException
+      */
+    public function testIfErrorOnForbiddenNameAgain(){
+        $tpl = new TplBlock("kjsd54.5");
+    }
+
+
 }