echo dot 1 vs 2

However, it is not easy to become a PHP programming expert. As many people think, as long as you can write a few simple Code To solve a complicated problem, it is the PHP programming experts who need to consider more other problems. The following three principles are a mature PHP Program Guidelines that should be followed first in the compilation process. 1. Laziness is gold 2. write beautiful code 3. The

$ file name and path$1,$2 parameter 1, parameter 2$# The number of arguments passed to the script or function $$ current shell process ID $? judge execution succeeded or not 0 for success [email protected] Pass all parameters of a script or function$* Pass all parameters of a script or function${}N

Crond StartChkconfig Crond onCrontab-e* TAR-CZF Log.tar.gz/var/logXX */3 * * * WHOCrontab-lCrontab-r/etc/cron.d/etc/cron.hourly/etc/cron.daily/etc/cron.weeklyUptimefree [-b|-k|-m]Df-htDf-iIfconfigNetstat-nutlpPs-ePs-efTopM memory N PID Z HighlightTop-d 1-pIfconfig eth0 192.168.0.31 netmask 255.255.255.0Ifconfig eth0 DownIfconfig eth0 upHostnameHostname centos.example.comHostname-iRouteRoute-nRoute add default GW 192.168.0.254Route add-net 172.16.0.0/

With Print_r ($arr); Output: Array ([0] = 1,3,2) With Var_dump ($arr); Output: Array (1) {[0]=> string (5) "1,3,2"} The For loop output gets for ($i = 0; $i echo $arr [$i]; } Output: Comma actually also traversed out of there What is the structure of this number, how can I take this for loop time to remove the comma? Only this structure is exported: 1

semicolon. This is to tell the JDK to search the class for the current directory's class file-why, this is due to the security mechanism of Linux, Linux users understand that the Windows users are very difficult to understand (because the Windows default search order is the first to search the current directory , then search the system directory, and then search for the PATH environment variable set).Why is Tools.jar this specific file specified later in classpath? Don't specify a line? Obvious

-click the operation of the VBS is not the same, ASP under the relatively cool, you can change referer. To this end I also installed a special IIS test, found that the return of the same is no referer. Later, I see the following message, "Forgive me for the ASP is not familiar, give you what help, I check other information for reference to it", "This I did not play ASP, the code is only reference to, the ASP's not tested." I really do not want to curse, not familiar you write also forget, at le