hash: Add simple HashContext::__debugInfo() implementation

NEWS

@@ -78,6 +78,7 @@ PHP                                                                        NEWS
 
 - Hash:
   . Changed return type of hash_update() to true. (nielsdos)
+  . Added HashContext::__debugInfo(). (timwolla)
 
 - IMAP:
   . Moved to PECL. (Derick Rethans)

UPGRADING

@@ -230,6 +230,9 @@ PHP 8.4 UPGRADE NOTES
 - FPM:
   . Flushing headers without a body will now succeed. See GH-12785.
 
+- Hash:
+  . Added HashContext::__debugInfo().
+
 - Intl:
   . NumberFormatter::ROUND_HALFODD added to complement existing
     NumberFormatter::ROUND_HALFEVEN functionality.

ext/hash/hash.c

@@ -1560,6 +1560,21 @@ PHP_METHOD(HashContext, __unserialize)
 }
 /* }}} */
 
+ZEND_METHOD(HashContext, __debugInfo)
+{
+	zval *object = ZEND_THIS;
+	php_hashcontext_object *hash = php_hashcontext_from_object(Z_OBJ_P(object));
+
+	ZEND_PARSE_PARAMETERS_NONE();
+
+	zval tmp;
+
+	array_init(return_value);
+
+	ZVAL_STRING(&tmp, hash->ops->algo);
+	zend_hash_str_update(Z_ARR_P(return_value), "algo", strlen("algo"), &tmp);
+}
+
 /* {{{ PHP_MINIT_FUNCTION */
 PHP_MINIT_FUNCTION(hash)
 {

ext/hash/hash.stub.php

@@ -102,4 +102,6 @@ private function __construct() {}
     public function __serialize(): array {}
 
     public function __unserialize(array $data): void {}
+
+    public function __debugInfo(): array {}
 }

ext/hash/tests/HashContext_debugInfo.phpt

@@ -0,0 +1,18 @@
+--TEST--
+Hash: HashContext::__debugInfo()
+--FILE--
+<?php
+
+var_dump(hash_init('sha256'));
+var_dump(hash_init('sha3-512'));
+
+?>
+--EXPECTF--
+object(HashContext)#%d (1) {
+  ["algo"]=>
+  string(6) "sha256"
+}
+object(HashContext)#%d (1) {
+  ["algo"]=>
+  string(8) "sha3-512"
+}