Traits are a mechanism for code reuse in single inheritance languages such as PHP. A Trait is intended to reduce some limitations of single inheritance by enabling a developer to r...www.php.net

(PHP 4, PHP 5, PHP 7, PHP 8) array_unshift—在数组开头插入一个或多个单元 说明 array_unshift( &$array, ...$values): array_unshift()将传入的单元插入到array数组的开头。注意单...www.php.net

如果两个成员完全相同,那么它们将保持原来的顺序。 在 PHP 8.0.0 之前,它们在排序数组中的相对顺序是未定义的。 注意:此函数为array中的元素赋与新的键名。这将删除原有的键名,而不是仅仅将...www.php.net

. Also note that a null character ( \0 ) is not equivalent to the PHP constant. If multiple parameters are supplied thenisset()will return only if all of the parameters are conside...www.php.net

Here are some notes regarding PHP pThreads v3 that I have gathered: -namespace: It does not understand namespaces. -globals: It won't serialize GLOBALS at all! And will not re...www.php.net