Add preg_last_error_msg() function

Provides the last PCRE error as a human-readable message, similar
to functionality existing in other extensions, such as
json_last_error_msg().

Closes GH-5185.

1 files changed, 11 insertions, 1 deletions

diff --git a/ext/pcre/php_pcre.h b/ext/pcre/php_pcre.h
index 3c2fff4251..bf78f992fa 100644
--- a/ext/pcre/php_pcre.h
+++ b/ext/pcre/php_pcre.h
@@ -37,6 +37,16 @@ extern zend_module_entry pcre_module_entry;
 
 typedef struct _pcre_cache_entry pcre_cache_entry;
 
+typedef enum {
+    PHP_PCRE_NO_ERROR = 0,
+    PHP_PCRE_INTERNAL_ERROR,
+    PHP_PCRE_BACKTRACK_LIMIT_ERROR,
+    PHP_PCRE_RECURSION_LIMIT_ERROR,
+    PHP_PCRE_BAD_UTF8_ERROR,
+    PHP_PCRE_BAD_UTF8_OFFSET_ERROR,
+    PHP_PCRE_JIT_STACKLIMIT_ERROR
+} php_pcre_error_code;
+
 PHPAPI pcre_cache_entry* pcre_get_compiled_regex_cache(zend_string *regex);
 PHPAPI pcre_cache_entry* pcre_get_compiled_regex_cache_ex(zend_string *regex, int locale_aware);
 
@@ -70,7 +80,7 @@ ZEND_BEGIN_MODULE_GLOBALS(pcre)
 	zend_bool jit;
 #endif
 	zend_bool per_request_cache;
-	int  error_code;
+	php_pcre_error_code error_code;
 	/* Used for unmatched subpatterns in OFFSET_CAPTURE mode */
 	zval unmatched_null_pair;
 	zval unmatched_empty_pair;