diff --git a/admin/mnet/index.php b/admin/mnet/index.php
index fb4e2c4ccfa..d6e544eac50 100644
--- a/admin/mnet/index.php
+++ b/admin/mnet/index.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 
     // Allows the admin to configure mnet stuff
 
diff --git a/auth/shibboleth/README.txt b/auth/shibboleth/README.txt
index a343c850e4c..849dad23f43 100644
--- a/auth/shibboleth/README.txt
+++ b/auth/shibboleth/README.txt
@@ -203,7 +203,7 @@ can directly edit the object $result.
 Example file:
 
 --
-<?PHP
+<?php
 
     // Set the zip code and the adress
     if ($_SERVER[$this->config->field_map_address] != '')
diff --git a/blocks/community/block_community.php b/blocks/community/block_community.php
index cead2b29308..ecfa3b9a0d7 100644
--- a/blocks/community/block_community.php
+++ b/blocks/community/block_community.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
diff --git a/config-dist.php b/config-dist.php
index 82b12952f9a..66c83376336 100644
--- a/config-dist.php
+++ b/config-dist.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 ///////////////////////////////////////////////////////////////////////////
 //                                                                       //
 // Moodle configuration file                                             //
diff --git a/filter/algebra/algebradebug.php b/filter/algebra/algebradebug.php
index 39399776532..2ee949ababd 100644
--- a/filter/algebra/algebradebug.php
+++ b/filter/algebra/algebradebug.php
@@ -342,7 +342,7 @@ http://www.forkosh.com/mimetex.zip</a>, or looking for an appropriate
 binary at <a href="http://moodle.org/download/mimetex/">
 http://moodle.org/download/mimetex/</a>. You may then also need to
 edit your moodle/filter/algebra/pix.php file to add
-<br /><?PHP echo "case &quot;" . PHP_OS . "&quot;:" ;?><br ?> to the list of operating systems
+<br /><?php echo "case &quot;" . PHP_OS . "&quot;:" ;?><br ?> to the list of operating systems
 in the switch (PHP_OS) statement. Windows users may have a problem properly
 unzipping mimetex.exe. Make sure that mimetex.exe is is <b>PRECISELY</b>
 433152 bytes in size. If not, download fresh copy from
diff --git a/filter/algebra/pix.php b/filter/algebra/pix.php
index c4f29d9626a..8172b782226 100644
--- a/filter/algebra/pix.php
+++ b/filter/algebra/pix.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
       // This function fetches math. images from the data directory
       // If not, it obtains the corresponding TeX expression from the cache_tex db table
       // and uses mimeTeX to create the image file
diff --git a/filter/tex/pix.php b/filter/tex/pix.php
index 4249e7fb0a0..43c9d1a48ec 100644
--- a/filter/tex/pix.php
+++ b/filter/tex/pix.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
       // This function fetches math. images from the data directory
       // If not, it obtains the corresponding TeX expression from the cache_tex db table
       // and uses mimeTeX to create the image file
diff --git a/filter/tex/texdebug.php b/filter/tex/texdebug.php
index c56df3ea068..51588da279b 100644
--- a/filter/tex/texdebug.php
+++ b/filter/tex/texdebug.php
@@ -364,7 +364,7 @@ http://www.forkosh.com/mimetex.zip</a>, or looking for an appropriate
 binary at <a href="http://moodle.org/download/mimetex/">
 http://moodle.org/download/mimetex/</a>. You may then also need to
 edit your moodle/filter/tex/pix.php file to add
-<br /><?PHP echo "case &quot;" . PHP_OS . "&quot;:" ;?><br ?> to the list of operating systems
+<br /><?php echo "case &quot;" . PHP_OS . "&quot;:" ;?><br ?> to the list of operating systems
 in the switch (PHP_OS) statement. Windows users may have a problem properly
 unzipping mimetex.exe. Make sure that mimetex.exe is is <b>PRECISELY</b>
 433152 bytes in size. If not, download a fresh copy from
diff --git a/lang/en/my.php b/lang/en/my.php
index 41a4688b7a3..2d819a7003a 100644
--- a/lang/en/my.php
+++ b/lang/en/my.php
@@ -1,4 +1,4 @@
-<?PHP // $Id$ 
+<?php // $Id$ 
       // my.php - created with Moodle 1.7 beta + (2006101003)
 
 
@@ -13,4 +13,4 @@ $string['addpage'] = 'Add page';
 $string['delpage'] = 'Delete page';
 $string['managepages'] = 'Manage pages';
 $string['resetpage'] = 'Reset page to default';
-$string['reseterror'] = 'There was an error resetting your page';
\ No newline at end of file
+$string['reseterror'] = 'There was an error resetting your page';
diff --git a/mod/assign/feedback/file/lib.php b/mod/assign/feedback/file/lib.php
index 6ae9635fc54..5b74c7d2f08 100644
--- a/mod/assign/feedback/file/lib.php
+++ b/mod/assign/feedback/file/lib.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
diff --git a/mod/assign/lib.php b/mod/assign/lib.php
index 6f7962c9411..1d06d5101f7 100644
--- a/mod/assign/lib.php
+++ b/mod/assign/lib.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
diff --git a/mod/assign/submission/comments/lib.php b/mod/assign/submission/comments/lib.php
index 259a99c874c..353204ebf5f 100644
--- a/mod/assign/submission/comments/lib.php
+++ b/mod/assign/submission/comments/lib.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
diff --git a/mod/assign/submission/file/lib.php b/mod/assign/submission/file/lib.php
index c8fcbae8121..0c8b1e0323c 100644
--- a/mod/assign/submission/file/lib.php
+++ b/mod/assign/submission/file/lib.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
diff --git a/mod/assign/submission/onlinetext/lib.php b/mod/assign/submission/onlinetext/lib.php
index a2bcde96b80..4b9325ad1e9 100644
--- a/mod/assign/submission/onlinetext/lib.php
+++ b/mod/assign/submission/onlinetext/lib.php
@@ -1,4 +1,4 @@
-<?PHP
+<?php
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
diff --git a/mod/assignment/lib.php b/mod/assignment/lib.php
index 0f6940d1b69..9b125863bc7 100644
--- a/mod/assignment/lib.php
+++ b/mod/assignment/lib.php
@@ -1,5 +1,4 @@
-<?PHP
-
+<?php
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify