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-rw-r--r--ext/filter/filter.c1
-rw-r--r--ext/filter/filter_private.h1
-rw-r--r--ext/filter/sanitizing_filters.c1
3 files changed, 3 insertions, 0 deletions
diff --git a/ext/filter/filter.c b/ext/filter/filter.c
index 824d558405..64cafe5410 100644
--- a/ext/filter/filter.c
+++ b/ext/filter/filter.c
@@ -251,6 +251,7 @@ PHP_MINIT_FUNCTION(filter)
REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_LOW", FILTER_FLAG_STRIP_LOW, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_HIGH", FILTER_FLAG_STRIP_HIGH, CONST_CS | CONST_PERSISTENT);
+ REGISTER_LONG_CONSTANT("FILTER_FLAG_STRIP_BACKTICK", FILTER_FLAG_STRIP_BACKTICK, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_LOW", FILTER_FLAG_ENCODE_LOW, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_HIGH", FILTER_FLAG_ENCODE_HIGH, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("FILTER_FLAG_ENCODE_AMP", FILTER_FLAG_ENCODE_AMP, CONST_CS | CONST_PERSISTENT);
diff --git a/ext/filter/filter_private.h b/ext/filter/filter_private.h
index b3db3cd724..9bb234f490 100644
--- a/ext/filter/filter_private.h
+++ b/ext/filter/filter_private.h
@@ -39,6 +39,7 @@
#define FILTER_FLAG_ENCODE_AMP 0x0040
#define FILTER_FLAG_NO_ENCODE_QUOTES 0x0080
#define FILTER_FLAG_EMPTY_STRING_NULL 0x0100
+#define FILTER_FLAG_STRIP_BACKTICK 0x0200
#define FILTER_FLAG_ALLOW_FRACTION 0x1000
#define FILTER_FLAG_ALLOW_THOUSAND 0x2000
diff --git a/ext/filter/sanitizing_filters.c b/ext/filter/sanitizing_filters.c
index cdfe08c29b..8ebcd08603 100644
--- a/ext/filter/sanitizing_filters.c
+++ b/ext/filter/sanitizing_filters.c
@@ -123,6 +123,7 @@ static void php_filter_strip(zval *value, long flags)
for (i = 0; i < Z_STRLEN_P(value); i++) {
if ((str[i] > 127) && (flags & FILTER_FLAG_STRIP_HIGH)) {
} else if ((str[i] < 32) && (flags & FILTER_FLAG_STRIP_LOW)) {
+ } else if ((str[i] == '`') && (flags & FILTER_FLAG_STRIP_BACKTICK)) {
} else {
buf[c] = str[i];
++c;