Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
  Fix #78003: strip_tags output change since PHP 7.3

Author: cmb69

ext/standard/string.c

@@ -5232,6 +5232,10 @@ PHPAPI size_t php_strip_tags_ex(char *rbuf, size_t len, uint8_t *stateptr, const
 			}
 			break;
 		case '>':
+			if (depth) {
+				depth--;
+				break;
+			}
 			if (in_q) {
 				break;
 			}
@@ -5289,6 +5293,10 @@ PHPAPI size_t php_strip_tags_ex(char *rbuf, size_t len, uint8_t *stateptr, const
 	c = *p;
 	switch (c) {
 		case '>':
+			if (depth) {
+				depth--;
+				break;
+			}
 			if (in_q) {
 				break;
 			}

ext/standard/tests/strings/bug78003.phpt

@@ -0,0 +1,16 @@
+--TEST--
+Bug #78003 (strip_tags output change since PHP 7.3)
+--FILE--
+<?php
+var_dump(
+    strip_tags('<foo<>bar>'),
+    strip_tags('<foo<!>bar>'),
+    strip_tags('<foo<?>bar>')
+);
+?>
+===DONE===
+--EXPECT--
+string(0) ""
+string(0) ""
+string(0) ""
+===DONE===