[php-src] master: [skip ci] CODING_STANDARDS.md: added exception class assertion reminder (#23220)

Author: NickSdot (NickSdot)
Committer: GitHub (web-flow)
Pusher: LamentXU123
Date: 2026-08-12T19:22:18+08:00

Commit: https://github.com/php/php-src/commit/849d955f1e7311e5aa0c8fcebbfc851f4d3c3639
Raw diff: https://github.com/php/php-src/commit/849d955f1e7311e5aa0c8fcebbfc851f4d3c3639.diff

[skip ci] CODING_STANDARDS.md: added exception class assertion reminder (#23220)

Co-authored-by: Weilin Du <[email protected]>

Changed paths:
  M  CODING_STANDARDS.md


Diff:

diff --git a/CODING_STANDARDS.md b/CODING_STANDARDS.md
index 3a53d0e258ca..f2c559a389ff 100644
--- a/CODING_STANDARDS.md
+++ b/CODING_STANDARDS.md
@@ -295,6 +295,21 @@ rewritten to comply with these rules.
 1. Extensions should be well tested using `*.phpt` tests. Read more at
     [qa.php.net](https://qa.php.net/write-test.php) documentation.
 
+2. When testing exceptions, assert the error class in the catch block.
+
+```diff
+  try {
+      throw new ValueError('foo');
+  } catch (ValueError $e) {
+-     echo $e->getMessage(), "\n";
++     echo $e::class, ': ', $e->getMessage(), "\n";
+  }
+
+  --EXPECT--
+- foo
++ ValueError: foo
+```
+
 ## New and experimental functions
 
 To reduce the problems normally associated with the first public implementation