Raise E_WARNING on PHP related errors

If Zip operations fails due to PHP error conditions before libzip even
has been called, there is no meaningful indication what failed; the
functions just return false, and the Zip status indicated that no error
did occur.  Therefore we raise `E_WARNING` in these cases.

Closes GH-6356.

ext/zip/php_zip.c

@@ -288,11 +288,13 @@ static int php_zip_add_file(ze_zip_object *obj, const char *filename, size_t fil
 	}
 
 	if (!expand_filepath(filename, resolved_path)) {
+		php_error_docref(NULL, E_WARNING, "No such file or directory");
 		return -1;
 	}
 
 	php_stat(resolved_path, strlen(resolved_path), FS_EXISTS, &exists_flag);
 	if (Z_TYPE(exists_flag) == IS_FALSE) {
+		php_error_docref(NULL, E_WARNING, "No such file or directory");
 		return -1;
 	}
 
@@ -1163,6 +1165,7 @@ PHP_FUNCTION(zip_open)
 	}
 
 	if(!expand_filepath(ZSTR_VAL(filename), resolved_path)) {
+		php_error_docref(NULL, E_WARNING, "No such file or directory");
 		RETURN_FALSE;
 	}
 
@@ -1444,6 +1447,7 @@ PHP_METHOD(ZipArchive, open)
 	}
 
 	if (!(resolved_path = expand_filepath(ZSTR_VAL(filename), NULL))) {
+		php_error_docref(NULL, E_WARNING, "No such file or directory");
 		RETURN_FALSE;
 	}
 

ext/zip/tests/bug64342_0.phpt

@@ -38,6 +38,8 @@ DONE
 ?>
 --EXPECTF--
 %s.txt
+
+Warning: ZipArchive::addFile(): No such file or directory in %s on line %d
 add failed
 close ok
 DONE

ext/zip/tests/bug64342_1-mb.phpt

@@ -37,6 +37,7 @@ if ($zip->status == ZIPARCHIVE::ER_OK) {
 }
 @unlink($file);
 ?>
---EXPECT--
+--EXPECTF--
+Warning: ZipArchive::addFile(): No such file or directory in %s on line %d
 failed
 OK

ext/zip/tests/bug64342_1.phpt

@@ -37,6 +37,7 @@ if ($zip->status == ZIPARCHIVE::ER_OK) {
 }
 @unlink($file);
 ?>
---EXPECT--
+--EXPECTF--
+Warning: ZipArchive::addFile(): No such file or directory in %s on line %d
 failed
 OK