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PHP//strlen ("AAA"); Take the length of the string * * * Echo strlen("AAAAA"); Echo"; //$array = explode ("|", $s); splits the string, returns an array of strings * * * $str 1= "Aaaa|bbb|cc|d"; $array 1=Explode("|",$str 1); Print_r($array 1); Echo"; Print_r(Explode("|",$str 1)); Echo"; //$s = substr ($s, 4,10), intercept string, intercept based on the end position of the start position * * * $str 2= "Hello World"; Echo substr($str 2, 2,3); Ec

PHP Reflection class ReflectionClass and ReflectionObject extension reflection class in PHP. this extension is used to analyze php programs, export or extract detailed information about classes, methods, attributes, parameters, and so on, including comments. Let's look at this question. the member variables of the php class are not declared in the class, but in the function. what is the difference? The code is as follows: Class test { Private $ name; Private $ sex; Function _ construct (){ $ T

Delphi Tstringlist Usage Detailed.Tstringlist Common Methods and properties:varlist:tstringlist; I:integer;beginList:= Tstringlist.Create; List.add ('STRINGS1');{Add}List.add ('STRINGS2'); List.exchange (0,1);{Displacement}List.insert (0,'STRINGS3');{Insert}I:= List.indexof ('STRINGS1');{the first occurrence of the position}List.sort; {Sort}list.sorted:= True;{Specify sort}List.count; {Total}List.text; {Text Collection}List.delete (0);{Delete, 0 is the first data}List.loadfromfile ('C:/tmp.txt')

previous one after restart. Third (modify the content of the underlying Nic file ): Command:/etc/rc. d/init. d/network restart Set system date Data MMDDHHMMCCYY. SS // Modify the system time, with the following letters representing: Month, month, day, hour, minute, year, year, and second View calendar) View calendar: cal 5 2016 // view calendar of May 2016 View calendar: cal 2016 // view the calendar for the entire year of 2016 USER environment variable:/home/user/. bash_profile System e

need to design and program them separately.The server side is relatively simple, mainly including adding files to be uploaded, listening to customers, and transferring files. The resumable upload functions and file management are all stored on the client. I. Server Side First, we will introduce the server:At the beginning, we need to define a simple protocol, that is, a language that the server and client can understand. In order to simplify the problem, I only need to let the server understand

new class, and the class being represented should also be a new classThe descriptor must be defined as a class property of this class and cannot be defined in a constructorThree to strictly follow this priority, priority from high to the end is1. Class Properties2. Data descriptors3. Instance Properties4. Non-data descriptors5. Property not found triggering __getattr__ ()Six again See propertyThe nature of a static property is to implement the Get,set,delete three methodsClass Foo: @property

output of this example:Constructor with argument //Cexample aaa (2), constructor with argument //cexample BBB (3); Assignment operatorAnalysis: There is nothing special about the first and the second, which is the normal constructor. The third and fourth why the results are different:The reason is that the BBB object has already been instantiated and does not need to be constructed, at this point only the

Pointer chain AAA Leak case BBB Leak case------------- ------------- -------------(1) RRR------------> BBB DR(2) RRR---> AAA---> BBB DR IR(3) RRR BBB DL(4) RRR AAA---> BBB DL IL(5) RRR------?-----> BBB (y) DR, (n) DL(6) RRR---> AAA-?-> BBB DR (y) IR, (n) DL(7) RRR-?->

. PHP 1. Php.bak Copy a file (plus -i parameter if 1.php.bak exists then ask if the overlay test is not added -I will also ask whether to overwrite)CP a copy a catalog errorCP -r A copy directory must add -r parameterMove a file or directory (or rename)Mv1. PHP Test/1. PHP moves 1.php to the test directoryMv1. PHP Test/2. PHP moves 1.php to the test directory and renames to 2.phpMv-I1. PHP Test/2. php (Parameter-i) move the 1.php to the test directory and rename it to 2.php but if there is a dup

Problem descriptionAfter a lock is added to a non-final object using synchronized, the value (state) of the object is changed in the synchronized body (synchronous code block), which causes the thread to be unsafe, that is, the other thread gets the lock of the object after the change, thus entering the synchronization code block.Scene design Public classTestlockextendsthread{PrivateAAA AAA; PublicTestlock (AAA