diff -r 53cff4b4a802 -r bde1974c263b web/wp-includes/compat.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/wp-includes/compat.php	Wed Feb 03 15:37:20 2010 +0000
@@ -0,0 +1,162 @@
+<?php
+/**
+ * WordPress implementation for PHP functions missing from older PHP versions.
+ *
+ * @package PHP
+ * @access private
+ */
+
+// Added in PHP 5.0
+
+if (!function_exists('http_build_query')) {
+	function http_build_query($data, $prefix=null, $sep=null) {
+		return _http_build_query($data, $prefix, $sep);
+	}
+}
+
+// from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
+function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
+	$ret = array();
+
+	foreach ( (array) $data as $k => $v ) {
+		if ( $urlencode)
+			$k = urlencode($k);
+		if ( is_int($k) && $prefix != null )
+			$k = $prefix.$k;
+		if ( !empty($key) )
+			$k = $key . '%5B' . $k . '%5D';
+		if ( $v === NULL )
+			continue;
+		elseif ( $v === FALSE )
+			$v = '0';
+
+		if ( is_array($v) || is_object($v) )
+			array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
+		elseif ( $urlencode )
+			array_push($ret, $k.'='.urlencode($v));
+		else
+			array_push($ret, $k.'='.$v);
+	}
+
+	if ( NULL === $sep )
+		$sep = ini_get('arg_separator.output');
+
+	return implode($sep, $ret);
+}
+
+if ( !function_exists('_') ) {
+	function _($string) {
+		return $string;
+	}
+}
+
+if (!function_exists('stripos')) {
+	function stripos($haystack, $needle, $offset = 0) {
+		return strpos(strtolower($haystack), strtolower($needle), $offset);
+	}
+}
+
+if ( !function_exists('hash_hmac') ):
+function hash_hmac($algo, $data, $key, $raw_output = false) {
+	return _hash_hmac($algo, $data, $key, $raw_output);
+}
+endif;
+
+function _hash_hmac($algo, $data, $key, $raw_output = false) {
+	$packs = array('md5' => 'H32', 'sha1' => 'H40');
+
+	if ( !isset($packs[$algo]) )
+		return false;
+
+	$pack = $packs[$algo];
+
+	if (strlen($key) > 64)
+		$key = pack($pack, $algo($key));
+
+	$key = str_pad($key, 64, chr(0));
+
+	$ipad = (substr($key, 0, 64) ^ str_repeat(chr(0x36), 64));
+	$opad = (substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64));
+
+	$hmac = $algo($opad . pack($pack, $algo($ipad . $data)));
+
+	if ( $raw_output )
+		return pack( $pack, $hmac );
+	return $hmac;
+}
+
+if ( !function_exists('mb_substr') ):
+	function mb_substr( $str, $start, $length=null, $encoding=null ) {
+		return _mb_substr($str, $start, $length, $encoding);
+	}
+endif;
+
+function _mb_substr( $str, $start, $length=null, $encoding=null ) {
+	// the solution below, works only for utf-8, so in case of a different
+	// charset, just use built-in substr
+	$charset = get_option( 'blog_charset' );
+	if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
+		return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
+	}
+	// use the regex unicode support to separate the UTF-8 characters into an array
+	preg_match_all( '/./us', $str, $match );
+	$chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
+	return implode( '', $chars );
+}
+
+if ( !function_exists( 'htmlspecialchars_decode' ) ) {
+	// Added in PHP 5.1.0
+	// Error checks from PEAR::PHP_Compat
+	function htmlspecialchars_decode( $string, $quote_style = ENT_COMPAT )
+	{
+		if ( !is_scalar( $string ) ) {
+			trigger_error( 'htmlspecialchars_decode() expects parameter 1 to be string, ' . gettype( $string ) . ' given', E_USER_WARNING );
+			return;
+		}
+
+		if ( !is_int( $quote_style ) && $quote_style !== null ) {
+			trigger_error( 'htmlspecialchars_decode() expects parameter 2 to be integer, ' . gettype( $quote_style ) . ' given', E_USER_WARNING );
+			return;
+		}
+
+		return wp_specialchars_decode( $string, $quote_style );
+	}
+}
+
+// For PHP < 5.2.0
+if ( !function_exists('json_encode') ) {
+	function json_encode( $string ) {
+		global $wp_json;
+
+		if ( !is_a($wp_json, 'Services_JSON') ) {
+			require_once( 'class-json.php' );
+			$wp_json = new Services_JSON();
+		}
+
+		return $wp_json->encodeUnsafe( $string );
+	}
+}
+
+if ( !function_exists('json_decode') ) {
+	function json_decode( $string ) {
+		global $wp_json;
+
+		if ( !is_a($wp_json, 'Services_JSON') ) {
+			require_once( 'class-json.php' );
+			$wp_json = new Services_JSON();
+		}
+
+		return $wp_json->decode( $string );
+	}
+}
+
+// pathinfo that fills 'filename' without extension like in PHP 5.2+
+function pathinfo52($path) {
+	$parts = pathinfo($path);
+	if ( !isset($parts['filename']) ) {
+		$parts['filename'] = substr( $parts['basename'], 0, strrpos($parts['basename'], '.') );
+		if ( empty($parts['filename']) ) // there's no extension
+			$parts['filename'] = $parts['basename'];
+	}
+	return $parts;
+}