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time, the description of the scene is the night of early autumn, Altair, Vega on both sides of the Milky Way, the late autumn evening is seeing the heavens top, then the Galaxy should be Southwest, now say "star Han West Flow", is the Milky Way west, said the night has been very deep.⑦: Refers to the Morning glory, the weaver. Counterrevolutionaries: A bridge over the river. Legend of the legendary Morning Glory and the Tianhe, can only meet on July

PHP AutoLoad Mechanism detailed(1) AutoLoad mechanism overviewWhen developing a system using the PHP OO model, it is often customary to store the implementation of each class in a separate file, which makes it easy to reuse the classes and facilitate future maintenance. This is also one of the basic ideas of OO design. Before PHP5, if you need to use a class, just use Include/require to include it directly. The following is a practical example: Copy CodeThe code is as follows: /* Person.class.p

PHP AutoLoad Mechanism detailed (1) AutoLoad mechanism overview When developing a system using the PHP OO model, it is often customary to store the implementation of each class in a separate file, which makes it easy to reuse the classes and facilitate future maintenance. This is also one of the basic ideas of OO design. Before PHP5, if you need to use a class, just use Include/require to include it directly. The following is a practical example: /* Person.class.php */ Class Person {var $nam

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PHP autoload mechanism details(1) autoload mechanism OverviewWhen using the php oo mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which makes it easy to reuse classes, at the same time, it will be very convenient for future maintenance. This is also one of the basic ideas of OO design. Before using PHP5, to use a class, you only need to directly include it using include/require. The following is an example: Copy codeThe Code is as fo

$ B And (logical And) TRUEIf both $ a and $ B areTRUE. $ A | $ B Or (logical Or) TRUEIf either $ a or $ B isTRUE. Example #1 Example of logical operators The code is as follows: // The following foo () will not be called because they are short-circuited by the operator. $ A = (false foo ()); $ B = (true | foo ()); $ C = (false and foo ()); $ D = (true or foo ()); // "|" Has a higher priority than "or" $ E = false | true; // $ e is assigned (false | true) and retu

data, and use a number (size) to record how much data is stored in the array. If the array is full, you need to enlarge the array and copy the data from the old array to the new array.There are lots and lots of annoying details that you need to deal with, and you'll make mistakes when you're not careful---computer programming is like this.It is the basic skill of the programmer to develop the computer's thinking mode and to translate the requirement of human language into computer language smoo

Is less 5 > = Is greater than or equal 5> = 8 returns false Is less than or equal 5 Logical operators "And" and "or" have two different operators because they have different operation priorities (see operator priorities ). Example #1 Example of logical operators The code is as follows: // The following foo () will not be called because they are short-circuited by the operator.$ A = (false f

When using the php oo mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which makes it easy to reuse classes, at the same time, it will be very convenient for future maintenance. I. Overview of the autoload mechanism When using the php oo mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which makes it easy to reuse classes, at the same time, it will be very convenient for fu

isTRUEBut not at the same time. ! $ Not (logical non) TRUEIf $ a is notTRUE. $ A $ B And (logical And) TRUEIf both $ a and $ B areTRUE. $ A | $ B Or (logical Or) TRUEIf either $ a or $ B isTRUE. Example #1 Example of logical operators The code is as follows: // The following foo () will not be called because they are short-circuited by the operator.$ A = (false foo ());$ B = (true | foo ());$ C = (false and foo ());$ D = (true or foo ())

PHP autoload mechanism implementation analysis. I. autoload Mechanism Overview when using PHP's OO mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which will easily implement I. Overview of the autoload mechanism When using the php oo mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which makes it easy to reuse classes, at the same time, it will be very convenient for futu

true. Example #1 Logical Operator ExampleCopy CodeThe code is as follows:The following foo () is not called because they are "shorted" by the operator.$a = (false foo ());$b = (true | | foo ());$c = (False and foo ());$d = (true or foo ());"| |" has a higher priority than "or"$e = False | | True $e is assigned a value of (false | | true), and the result is true$f = False or true; $f is assigned false [Altair NOTE: ' = ' has a higher precede

'qwe {$ a} rty'; // qwe {$ a} rty, single quotes are not parsedEcho "qwe $ arty"; // qwe, because $ a became $ arty, which is undefined?> Logical operators Example of logical operators in the following table $ A and $ B And (logical and) TRUE, if both $ a And $ B are TRUE.$ A or $ B Or (logical or) TRUE, if $ a Or $ B is TRUE.$ A xor $ B Xor (logical exclusive or) TRUE. If either $ a or $ B is TRUE, but not both.! $ A Not (logical Not) TRUE, if $ a is Not TRUE.$ A $ B And (logical And)

PHP autoload mechanism details (1) autoload mechanism Overview When using the php oo mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which makes it easy to reuse classes, at the same time, it will be very convenient for future maintenance. This is also one of the basic ideas of OO design. Before using PHP5, to use a class, you only need to directly include it using include/require. The following is an example: /* Person. class. php */

PHP autoload mechanism details(1) autoload mechanism OverviewWhen using the php oo mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which makes it easy to reuse classes, at the same time, it will be very convenient for future maintenance. This is also one of the basic ideas of OO design. Before using PHP5, to use a class, you only need to directly include it using include/require. The following is an example:Copy codeThe Code is as fol

The following foo () is not called because they are "shorted" by the operator.$a = (false foo ());$b = (true | | foo ());$c = (False and foo ());$d = (true or foo ());"| |" has a higher priority than "or"$e = False | | True $e is assigned a value of (false | | true), and the result is true$f = False or true; $f is assigned false [Altair NOTE: ' = ' has a higher precedence than ' or ']Var_dump ($e, $f);"" has a higher priority than "and"$g = True fal

, but I recommend that you use autoload and spl_autoload for automatic loading.(1) autoload Mechanism OverviewWhen using the php oo mode to develop a system, we usually get used to storing the implementation of each class in a separate file, which makes it easy to reuse classes, at the same time, it will be very convenient for future maintenance. This is also one of the basic ideas of OO design. Before using PHP5, to use a class, you only need to directly include it using include/require. The fo

True > is greater than 5>8 returns False is less than 5 >= is greater than or equal to 5>=8 returns False is less than or equal to 5 logical operators There are two different forms of operators with and or, because their operations have different precedence (see operator precedence). Example #1 Logical Operators Example The code is as follows Copy Code The following foo () is not invoked because they are "shorted out" by the operator. $a = (false foo ()); $b = (

;// The following foo () will not be called because they are short-circuited by the operator.$ A = (false foo ());$ B = (true | foo ());$ C = (false and foo ());$ D = (true or foo ());// "|" Has a higher priority than "or"$ E = false | true; // $ e is assigned (false | true) and returns true.$ F = false or true; // $ f is assigned to false. [Altair note: "=" has a higher priority than "or"]Var_dump ($ e, $ f );

PHP AutoLoad Mechanism detailed(1) Overview of autoload mechanismWhen developing a system using the OO pattern in PHP, it is often customary to store implementations of each class in a separate file, which makes it easy to reuse classes and facilitates future maintenance. This is also one of the basic ideas of OO design. Before PHP5, if you need to use a class, just use Include/require to include it in it. The following is a practical example: Copy Code code as follows: * Person.