:rotating_light: remove Warning "Cannot modify header information ... "

app/dict/index.php

@@ -1,4 +1,4 @@
-<?PHP
+<?PHP
 require_once "../pcdl/html_head.php";
 ?>
 
@@ -194,4 +194,4 @@ ntf_init(1);
 
 	<?php
 include "../pcdl/html_foot.php";
-?>
+?>

app/pcdl/index.php

@@ -1,4 +1,4 @@
-<?php
+<?php
 require_once '../pcdl/html_head.php';
 ?>
 
@@ -306,4 +306,4 @@ require_once '../pcdl/html_head.php';
 
 	<?php
 	include "../pcdl/html_foot.php";
-	?>
+	?>

app/studio/index.php

@@ -1,4 +1,4 @@
-<?php
+<?php
 require_once '../ucenter/login.php';
 require_once '../public/config.php';
 require_once '../public/load_lang.php';

app/wiki/index.php

@@ -1,4 +1,4 @@
-<?PHP
+<?PHP
 include "../pcdl/html_head.php";
 ?>
 
@@ -239,4 +239,4 @@ include "../pcdl/html_head.php";
 		});
         </script>
 	</body>
-</html>
+</html>