a new scheduling task: 1. enter crontab-e in the command line and add the corresponding task. The wq disk is saved and exited. 2. directly edit the/etc/crontab file, that is, vi/etc/crontab, and add the corresponding task.
8. view the scheduling task crontab-l // list all the current scheduling tasks crontab-l-u jp // list all scheduling tasks of the user jp 9. delete the task scheduling task crontab-r //
to the between keyword in SQL, such as Findbysalarybetween (int max, int min);
The LessThan---is equivalent to "
GreaterThan---is equivalent to ">" in SQL, such as Findbysalarygreaterthan (int min);
IsNull---is equivalent to "is null" in SQL, such as Findbyusernameisnull ();
Isnotnull---is equivalent to "is not NULL" in SQL, such as Findbyusernameisnotnull ();
Notnull---and isnotnull equivalence;
The like---is equivalent to the "as" in SQL, such as Findbyusernamelike (String user);
file, that is, VI/etc/crontab, and add the corresponding task.
3. View scheduling tasks
Crontab-l // list all current scheduling tasks
Crontab-l-u JP // list all scheduling tasks of user JP
4. Delete Task Scheduling
Crontab-r // delete all task scheduling tasks
V. Transition of task scheduling execution results
Example 1: Execute the LS command at every day and output the result to the/
heard the efficiency is not as good as iconv .)
Mb_convert_encoding ('Ours ', 'utf-8', 'gb2312'); // Convert 'Ours from gb2312 to utf8
Mb_convert_encoding ('Ours ', 'utf-8'); // Convert 'Ours' to utf8 encoding format
/* "Auto" is expanded to "ASCII, JIS, UTF-8, EUC-JP, SJIS "*/$ Str = mb_convert_encoding ($ str, "EUC-JP", "auto ");
/* Auto detect encoding from JIS, eucjp-win, sjis-win, then convert str to
Like what
tsy0rcz9xlr7m75@m.marketplace.amazon.co.jp
tsy0rcz9xlr7m75@m.amazon.de.jp
I'm going to intercept the back of JP.
The number of the. At the back of the @ is not necessarily, there are many less
Reply to discussion (solution)
I was going to get the last suffix JP
substr ($str, Strrpos ($str, '. ') +1)
Should be able, no test!
echo pathinfo (' tsy0rcz9xlr7m75@m.amazon.de.jp ', pathi
"???????? Iphone5/4s/4??? ?? ?????????? ?????? ??????? "Mainly in Western Europe inside there is garbled will be judged as Japanese, if a character one character to judge that is not going to take a long time to deal with??
If I sayUrbanizaci? Camino de Vi?les Calle Rio Aragon N9 PinsequeIs GBK code can you accept this statement?
$s = "???????? Iphone5/4s/4??? ?? ?????????? ?????? ??????? Echo mb_detect_encoding ($s, "ascii,jis,utf-8,euc-jp,sjis"),
Resolution of truncation character problem when iconv function transcoding in PHP, Iconv truncation
Iconv is a conversion code, but in Chinese transcoding occurs when the display is not complete.Copy the Code code as follows:Iconv ("UTF-8", "Gb2312//ignore", $data); Add//ignore, ignore errorsor with mb_convert_encoding ()
Copy the Code code as follows:/* Convert internal code to SJIS */$str = mb_convert_encoding ($str, "SJIS");/* Convert EUC-JP to UT
Generally, iconv is used. The mb_convert_encoding function is used only when the encoding of the original encoding cannot be determined or the iconv cannot be normally displayed after conversion.Iconv function Syntax:Echo iconv ("ISO-8859-1", "UTF-8", "This is a test .");?>Syntax of the mb_convert_encoding function:/* Convert internal character encoding to SJIS */$ Str = mb_convert_encoding ($ str, "SJIS ");/* Converter EUC-JP to UTF-7 */$ Str = mb_co
Php character encoding conversion function usage example, php example
This article describes the usage of character encoding conversion functions in php. The specific implementation method is as follows:
Generally, character encoding is the most annoying issue in Web applications, especially when it comes to reading data from databases. php4.0.6 or later versions provide mb_convert_encoding for easy conversion.
The details are as follows:
Copy codeThe Code is as follows: /* Convert internal char
of a thousand.
5. encryption measures can be introduced
Good confidentiality and anti-counterfeiting.
6. low cost, easy to make, and durable
Because of these features, QR codes are becoming increasingly popular and widely used. (For more information, see Baidu encyclopedia. This article is not the focus, this blog post will show you how to generate and parse the QR code.
I. Java
Jar package: QRCode. jar
TwoDimensionCode class: QR code operation core class
TwoDimensionCode. java
Package com. QRC
browser will prompt you to correctly display the page need to download XX language support. This is done by reading the Content-type property of the META tag of the HTML page and knowing which character set to use to display the page. If the corresponding character set is not installed in the system, ie prompts to download. Other languages also correspond to different charset, such as the Japanese character set is "ISO-2022-JP", the Korean is "ks_c_5
Encoding in php has always been a headache for developers, but if some sweet and useful functions are different, let's introduce a processing function for Chinese encoding.
Mb_convert_encoding ($ str, $ encoding1, $ encoding2)
$ Str: string to be converted to Encoding$ Encoding1: Target encoding, such as UTF-8, gbk, and uppercase/lowercase$ Encoding2: original encoding, such as UTF-8, gbk, and uppercase/lowercase
Instance 1
The Code is as follows:
Copy code
$ Str = 'movie
The implementation of the two program communication under the premise of the simulation to achieve a stop waiting ARQ protocol.Simulation implementation:1. Communication process for normal data frames2. The communication process of the error frame3. Lost communication process for data framesProgram source code and resources download http://download.csdn.net/detail/qq_24054661/9802134Package Com.stopandwait.test;import Java.awt.*;import Java.awt.event.actionevent;import Java.awt.event.actionliste
equivalence;
The like---is equivalent to the "as" in SQL, such as Findbyusernamelike (String user);
The notlike---is equivalent to "not like" in SQL, such as Findbyusernamenotlike (String user);
The order-by---is equivalent to the "FINDBYUSERNAMEORDERBYSALARYASC" in SQL, such as the String user;
The not---is equivalent to "in SQL"! = ", such as Findbyusernamenot (String user);
In---is equivalent to ' in ' in SQL, such as Findbyusernamein (Collection
The notin---is equivalent to "not
be output. In addition, mb_convert_encoding does not have this bug.2. mb_convert_encoding can specify multiple input encodings, which are automatically identified based on the content, but the execution efficiency is much lower than iconv; for example: $ str =Mb_convert_encoding ($ str, "euc-jp", "ASCII, JIS, EUC-JP, SJIS, UTF-8"); "ASCII, JIS, EUC-JP, SJIS, the
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