unknown modifier

The following are: $a = ' 2tóngdòng dong 3 ' ;echo preg_replace ('/[^/', ', $a); Will prompt: Warning:preg_replace (): Unknown modifier ' P ' in E:\phpLearn\test.php on line 12 The reason is: In regular

The following regular expressions: $ A = '2 tóng D ò ng average 3 ';Echo preg_replace ('/ [^ /', '', $ ); Will prompt: Warning: preg_replace (): Unknown modifier 'p' in E: \ phplearn \ test. php on line 12

The following regular expressions: $ A = '2 tóng d ò ng average 3 ';Echo preg_replace ('/ [^ /', '', $ ); Will prompt: Warning: preg_replace (): Unknown modifier 'p' in E: \ phpLearn \ test. php on line 12 The

The Java language defines the six common modifiers public, protected, Private, abstract, static, and final.Five frequently-used modifiers are also defined. The following describes the 11 Java modifiers:1. PublicObjects used: classes, interfaces, and

Java Basics-Stack and heap, static, final modifier, inner class, and Java memory allocation (RPM)Java Stack and heapHeap: Random in orderStack: LIFO (last-in/first-out).The Java heap is a run-time data area in which the objects of the class allocate

The modifier mode can implement a very important object-oriented design principle, that is, the class should be open to expansion, and the modification should be closed. In other words, the function of an object is dynamically extended without

1. Access permission modifiersThe order from large to small is: public--protected--default--privateprivate--can only be used in the same class;default--does not need to write, default does not add. Can be used by classes in the same packageprotected-

Decoration Mode Dynamically attaches the responsibility to the object. To expand the functionality, the decorator provides an alternative solution that is more flexible than inheritance. The specific decorator and abstract decoration classes both

Modifier "Static" is not valid for this item,Modifier ' internal ' is not valid for this item.The exception pops up near the declaration of the relevant plug-in in the Config.Designer.CS fileInternal Static

The volatile keyword is a type modifier that uses the type variables it declares to indicate that it can be changed by unknown factors of Some compilers, such as operating systems, hardware, or other threads. When the variable declared by this