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[2005-06-09 19:35 UTC] pumuckel at metropolis dot de
Description:
------------
Nested array_walk calls don't work.
Reason: BG(array_walk_fci_cache) will not get re-initialized after inner array_walk call.
Following patch will help - better solution would be a local array_walk_fci_cache var inside the php_walk_array function:
diff -u php-5.0.4/ext/standard/array.c php-5.0.4.patched/ext/standard/array.c
--- php-5.0.4/ext/standard/array.c 2005-03-12 11:12:49.000000000 +0100
+++ php-5.0.4.patched/ext/standard/array.c 2005-06-09 19:31:43.000000000 +0200
@@ -1079,6 +1079,8 @@
}
zend_hash_move_forward_ex(target_hash, &pos);
}
+
+ BG(array_walk_fci_cache) = empty_fcall_info_cache;
return 0;
}
Reproduce code:
---------------
<?php
function test_subfunc(&$item1, $key, &$prefix)
{
echo " test_subfunc<br/>";
}
function test_func($item2, $key)
{
echo "test_func<br/>";
$arr = array(1, 2, 3, 4);
array_walk($arr, 'test_subfunc', 'extra_arg');
}
$x = array(5,6,7);
array_walk($x, 'test_func');
?>
Expected result:
----------------
test_func
test_subfunc
test_subfunc
test_subfunc
test_subfunc
test_func
test_subfunc
test_subfunc
test_subfunc
test_subfunc
test_func
test_subfunc
test_subfunc
test_subfunc
test_subfunc
Actual result:
--------------
test_func
test_subfunc
test_subfunc
test_subfunc
test_subfunc
Warning: Missing argument 3 for test_subfunc() in foo.php on line 3
test_subfunc
test_subfunc
PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Sat Mar 29 19:01:31 2025 UTC |
Here is the patch for using a local cache var instead of a global. In nested loops using the global cache var only the innermost array_walk function can effectively make use of the cache. All outermost loops can't because cache always got cleared from innermost and therefor functions have to be relocated. With local cache var this is not needed and we will get better performance with big nested arrays. Patch: diff -urw php-5.0.4/ext/standard/array.c php-5.0.4.patched/ext/standard/array.c --- php-5.0.4/ext/standard/array.c 2005-03-12 11:12:49.000000000 +0100 +++ php-5.0.4.patched/ext/standard/array.c 2005-06-10 09:25:15.000000000 +0200 @@ -1008,6 +1008,7 @@ uint string_key_len; ulong num_key; HashPosition pos; + zend_fcall_info_cache array_walk_fci_cache = empty_fcall_info_cache; /* Set up known arguments */ args[1] = &key; @@ -1051,7 +1052,7 @@ fci.no_separation = 0; /* Call the userland function */ - if (zend_call_function(&fci, &BG(array_walk_fci_cache) TSRMLS_CC) == SUCCESS) { + if (zend_call_function(&fci, &array_walk_fci_cache TSRMLS_CC) == SUCCESS) { if (retval_ptr) { zval_ptr_dtor(&retval_ptr); } @@ -1094,7 +1095,6 @@ HashTable *target_hash; argc = ZEND_NUM_ARGS(); - BG(array_walk_fci_cache) = empty_fcall_info_cache; old_walk_func_name = BG(array_walk_func_name); if (argc < 2 || argc > 3 || zend_get_parameters_ex(argc, &array, &BG(array_walk_func_name), &userdata) == FAILURE) { @@ -1131,7 +1131,6 @@ argc = ZEND_NUM_ARGS(); old_walk_func_name = BG(array_walk_func_name); - BG(array_walk_fci_cache) = empty_fcall_info_cache; if (argc < 2 || argc > 3 || zend_get_parameters_ex(argc, &array, &BG(array_walk_func_name), &userdata) == FAILURE) { diff -urw php-5.0.4/ext/standard/basic_functions.h php-5.0.4.patched/ext/standard/basic_functions.h --- php-5.0.4/ext/standard/basic_functions.h 2004-03-27 01:50:39.000000000 +0100 +++ php-5.0.4.patched/ext/standard/basic_functions.h 2005-06-10 09:24:46.000000000 +0200 @@ -154,7 +154,6 @@ ulong strtok_len; char str_ebuf[40]; zval **array_walk_func_name; - zend_fcall_info_cache array_walk_fci_cache; zval **user_compare_func_name; zend_fcall_info_cache user_compare_fci_cache; zend_llist *user_tick_functions;