Avoid function calls on each iteration of a `for` loop.

See #30799.

Built from https://develop.svn.wordpress.org/trunk@31678


git-svn-id: http://core.svn.wordpress.org/trunk@31659 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -1759,7 +1759,7 @@ function rawurlencode_deep( $value ) {
  */
 function antispambot( $email_address, $hex_encoding = 0 ) {
 	$email_no_spam_address = '';
-	for ( $i = 0; $i < strlen( $email_address ); $i++ ) {
+	for ( $i = 0, $len = strlen( $email_address ); $i < $len; $i++ ) {
 		$j = rand( 0, 1 + $hex_encoding );
 		if ( $j == 0 ) {
 			$email_no_spam_address .= '&#' . ord( $email_address[$i] ) . ';';

wp-includes/plugin.php

@@ -479,7 +479,7 @@ function do_action($tag, $arg = '') {
 		$args[] =& $arg[0];
 	else
 		$args[] = $arg;
-	for ( $a = 2; $a < func_num_args(); $a++ )
+	for ( $a = 2, $num = func_num_args(); $a < $num; $a++ )
 		$args[] = func_get_arg($a);
 
 	// Sort

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31677';
+$wp_version = '4.2-alpha-31678';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.