C/C ++ grand all (reproduced, original post address http://www.cnblogs.com/sevencat/archive/2004/06/10/14872.html)I. Standard definition macroThe standard predefined macros are specified by the relevant language standards, so they are available
Remove the characters to the left of the string:
"; Echo LTrim ($str, "Hello"); >
Definition and usage
The LTrim () function removes white space characters or other predefined characters to the left of the string.
1. Magic Constants
There are eight magic constants in PHP, and their values change as they change position in the code. These special constants are case insensitive.
Line: Returns the current row number in the file. Can also be written in
An object is called when it is instantiated. When _ construct and a function with the class name coexist, __construct will be called, and the other will not be called.
1. magic functions
1. _ construct ()
An object is called when it is
1 JSP script ElementJSP script elements are used to insert Java code, which will appear in the Servlet generated by the current JSP page. There are three types of script elements:Expression format : calculates the expression and outputs its
Returned directoryInitial version
In non-mvvm scenarios, developers can directly use commandbinding to provide execution methods for pre-defined commands (such as applicationcommands. Open), and
Glsl defines specific variables for different rendering stages. These predefined attributes (also called built-in variables) have specific attributes. All predefined variables start with GL. User-Defined variables cannot start with this.
Session variable ($_session): The data produced by the PHP session function is stored in the $_session variable in the form of a super global variable.
1. Introduction to Session
Sessions are also called session periods, which are small pieces of
This article mainly sorts out the predefined interfaces of PHP, which are commonly used in the project process: IteratorAggregate (Iterator of aggregate Iterator), Countable, ArrayAccess, Iterator, you can refer to the following predefined
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