diff -u urlencode rawurlencode

urlencode-rawurlencode.diff

--- urlencode  2013-08-09 20:57:57.000000000 +0900
+++ rawurlencode	2013-08-09 21:11:45.000000000 +0900
@@ -1,43 +1,30 @@
-PHPAPI char *php_url_encode(char const *s, int len, int *new_length)
+PHPAPI char *php_raw_url_encode(char const *s, int len, int *new_length)
 {
-	register unsigned char c;
-	unsigned char *to, *start;
-	unsigned char const *from, *end;
-
-	from = (unsigned char *)s;
-	end = (unsigned char *)s + len;
-	start = to = (unsigned char *) safe_emalloc(3, len, 1);
+	register int x, y;
+	unsigned char *str;

-	while (from < end) {
-		c = *from++;
-
-		if (c == ' ') {
-			*to++ = '+';
+	str = (unsigned char *) safe_emalloc(3, len, 1);
+	for (x = 0, y = 0; len--; x++, y++) {
+		str[y] = (unsigned char) s[x];
 #ifndef CHARSET_EBCDIC
-		} else if ((c < '0' && c != '-' && c != '.') ||
-				   (c < 'A' && c > '9') ||
-				   (c > 'Z' && c < 'a' && c != '_') ||
-				   (c > 'z')) {
-			to[0] = '%';
-			to[1] = hexchars[c >> 4];
-			to[2] = hexchars[c & 15];
-			to += 3;
+		if ((str[y] < '0' && str[y] != '-' && str[y] != '.') ||
+			(str[y] < 'A' && str[y] > '9') ||
+			(str[y] > 'Z' && str[y] < 'a' && str[y] != '_') ||
+			(str[y] > 'z' && str[y] != '~')) {
+			str[y++] = '%';
+			str[y++] = hexchars[(unsigned char) s[x] >> 4];
+			str[y] = hexchars[(unsigned char) s[x] & 15];
 #else /*CHARSET_EBCDIC*/
-		} else if (!isalnum(c) && strchr("_-.", c) == NULL) {
-			/* Allow only alphanumeric chars and '_', '-', '.'; escape the rest */
-			to[0] = '%';
-			to[1] = hexchars[os_toascii[c] >> 4];
-			to[2] = hexchars[os_toascii[c] & 15];
-			to += 3;
+		if (!isalnum(str[y]) && strchr("_-.~", str[y]) != NULL) {
+			str[y++] = '%';
+			str[y++] = hexchars[os_toascii[(unsigned char) s[x]] >> 4];
+			str[y] = hexchars[os_toascii[(unsigned char) s[x]] & 15];
 #endif /*CHARSET_EBCDIC*/
-		} else {
-			*to++ = c;
 		}
 	}
-	*to = 0;
+	str[y] = '\0';
 	if (new_length) {
-		*new_length = to - start;
+		*new_length = y;
 	}
-	return (char *) start;
+	return ((char *) str);
 }
-/* }}} */

at 2c9b4e87a0bf3890a3f12d9929123f4e49d0b1f5 (5.5.1)

The first commit is php/php-src@257de2b but it is just copying many files from PHP3's anywhere (?) to PHP 4 so we can't understand why these functions are separated.