Drop the requirement for the entry points to WordPress to be parsable by PHP4.

Previously we ensured that the entry points to WordPress were parsable by PHP4 in order to display a friendly not-supported-php error message.
However, for the last two years the main entry points have not actually parsed, and we've only added extra parse errors since it last worked in 3.9, so it's time we just remove this 'feature'.
The PHP version checks are still there for PHP 5.0/5.1, and so it's inplace when we eventually drop PHP 5.2 support.

See #29489.

Built from https://develop.svn.wordpress.org/trunk@38899


git-svn-id: http://core.svn.wordpress.org/trunk@38842 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/index.php

@@ -33,7 +33,6 @@ $parent_file = 'index.php';
 
 $help = '<p>' . __( 'Welcome to your WordPress Dashboard! This is the screen you will see when you log in to your site, and gives you access to all the site management features of WordPress. You can get help for any screen by clicking the Help tab above the screen title.' ) . '</p>';
 
-// Not using chaining here, so as to be parseable by PHP4.
 $screen = get_current_screen();
 
 $screen->add_help_tab( array(

wp-admin/setup-config.php

@@ -5,8 +5,6 @@
  * The permissions for the base directory must allow for writing files in order
  * for the wp-config.php to be created using this page.
  *
- * @internal This file must be parsable by PHP4.
- *
  * @package WordPress
  * @subpackage Administration
  */
@@ -316,7 +314,6 @@ switch($step) {
 	}
 
 	$key = 0;
-	// Not a PHP5-style by-reference foreach, as this file must be parseable by PHP4.
 	foreach ( $config_file as $line_num => $line ) {
 		if ( '$table_prefix  =' == substr( $line, 0, 16 ) ) {
 			$config_file[ $line_num ] = '$table_prefix  = \'' . addcslashes( $prefix, "\\'" ) . "';\r\n";

wp-includes/load.php

@@ -2,8 +2,6 @@
 /**
  * These functions are needed to load WordPress.
  *
- * @internal This file must be parsable by PHP4.
- *
  * @package WordPress
  */
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38898';
+$wp_version = '4.7-alpha-38899';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-load.php

@@ -13,8 +13,6 @@
  * directory to allow the WordPress directory to remain
  * untouched.
  *
- * @internal This file must be parsable by PHP4.
- *
  * @package WordPress
  */
 

wp-settings.php

@@ -5,8 +5,6 @@
  *
  * Allows for some configuration in wp-config.php (see default-constants.php)
  *
- * @internal This file must be parsable by PHP4.
- *
  * @package WordPress
  */