Fixed implicit cast issue with is*() and to*() functions

ext/standard/array.c

@@ -1174,12 +1174,12 @@ static int php_valid_var_name(char *var_name)
 	
 	len = strlen(var_name);
 	
-	if (!isalpha((int)var_name[0]) && var_name[0] != '_')
+	if (!isalpha((int)((unsigned char *)var_name)[0]) && var_name[0] != '_')
 		return 0;
 	
 	if (len > 1) {
 		for (i=1; i<len; i++) {
-			if (!isalnum((int)var_name[i]) && var_name[i] != '_') {
+			if (!isalnum((int)((unsigned char *)var_name)[i]) && var_name[i] != '_') {
 				return 0;
 			}
 		}

ext/standard/cyr_convert.c

@@ -210,7 +210,7 @@ static char * php_convert_cyr_string(unsigned char *str, int length, char from,
 	from_table = NULL;
 	to_table   = NULL;
 	
-	switch (toupper(from))
+	switch (toupper((int)(unsigned char)from))
 	{
 		case 'W':
 			from_table = _cyr_win1251;
@@ -232,7 +232,7 @@ static char * php_convert_cyr_string(unsigned char *str, int length, char from,
 			break;
 	}
 
-	switch (toupper(to))
+	switch (toupper((int)(unsigned char)to))
 	{
 		case 'W':
 			to_table = _cyr_win1251;

ext/standard/exec.c

@@ -134,7 +134,7 @@ int php_exec(int type, char *cmd, pval *array, pval *return_value TSRMLS_DC)
 			} else if (type == 2) {
 				/* strip trailing whitespaces */	
 				l = bufl;
-				while (l-- && isspace(buf[l]));
+				while (l-- && isspace(((unsigned char *)buf)[l]));
 				if (l != (bufl - 1)) {
 					bufl = l + 1;
 					buf[bufl] = '\0';
@@ -147,7 +147,7 @@ int php_exec(int type, char *cmd, pval *array, pval *return_value TSRMLS_DC)
 			/* strip trailing whitespaces if we have not done so already */	
 			if (type != 2) {
 				l = bufl;
-				while (l-- && isspace(buf[l]));
+				while (l-- && isspace(((unsigned char *)buf)[l]));
 				if (l != (bufl - 1)) {
 					bufl = l + 1;
 					buf[bufl] = '\0';

ext/standard/url_scanner_ex.re

@@ -236,7 +236,7 @@ static inline void handle_tag(STD_PARA)
 	ctx->tag.len = 0;
 	smart_str_appendl(&ctx->tag, start, YYCURSOR - start);
 	for (i = 0; i < ctx->tag.len; i++)
-		ctx->tag.c[i] = tolower(ctx->tag.c[i]);
+		ctx->tag.c[i] = tolower((int)(unsigned char)ctx->tag.c[i]);
 	if (zend_hash_find(ctx->tags, ctx->tag.c, ctx->tag.len, (void **) &ctx->lookup_data) == SUCCESS)
 		ok = 1;
 	STATE = ok ? STATE_NEXT_ARG : STATE_PLAIN;