- Php sleep every so many loops how to#
- Php sleep every so many loops drivers#
- Php sleep every so many loops driver#
- Php sleep every so many loops code#
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To be precise it is 11:53 am, the lights that indicate the start of the race goes off precisely at 12:00, not a second later.
Php sleep every so many loops how to#
Have a look at them PHP basics for expert web developers (1' part) Construct and Comments of PHP 7 How to use variables (PHP 7) Composite variable in PHP (Arrays, Object and more) PHP operators (part 1) PHP Operators (part 2) Conditional Structures in PHP Loops in PHP(Tutorial) If you haven't already read the other articles
Php sleep every so many loops series#
This blog post that belongs to the series " PHP basics for Expert developer". The foreach loop instead repeats the loop until the repeating elements do not end.Īt the moment everything can seem confusing I know, just bear with me, the aha moment will come soon.
Php sleep every so many loops code#
The for command has the characteristic of repeating the code for a predetermined number of occasions. The commands while and do.while repeating the loop until a condition is true.Īs you will see shortly, given the high similarity between them, in this article I will explain while and do.while together. The skill of a programmer is to figure out which one to use in which case.įortunately, given their name, they are easy to understand for a native English speaker. There are different types of loops, even if all of them have more or less the same functionality, each of them differs in features and modes of use.
Php sleep every so many loops driver#
The purpose of loops is to execute the same commands several times.Ī bit like a driver who accelerates, brakes and steers during a race, same commands over and over again. Today you will learn all about loops in programming languages. (Yes it exists, check this out! Https://en./wiki/Lawn_mower_racing)
I want you to close your eyes for a second and imagine, for the duration of this article, to be a pilot.įormula 1, MotoGP World Championship, NASCAR, even lawn mower racing do not matter. "Programmers are lazy people, who do not like doing the same things and especially do not like to waste time rewriting the same commands times and times again". One of the phrases my computer science teacher used to say to me often was that: With a programmer's mind, those memories are translated into one of the basic features of all programming languages.
Php sleep every so many loops drivers#
I spent hours and hours of my weekend watching an young Valentino Rossi skid with his Yamaha first and then Ducati, and Micheal Schumacher overtakes by a lap all the other Formula 1 drivers aboard his red Ferrari. For more information, just search this site, or see the “Related” section for other while loop and shell script tips.Whether you live in Europe, in the United States or in any other part of the world, I am sure that you have had the opportunity to see a race at least once in your life. I’ve also written many other Linux shell script while loop examples. Please note that it is very easy to create an infinite loop here, so be careful that the program you call will actually return a zero value at some time (assuming you decide to implement the loop exactly as shown above). If you ever wanted to write a while loop in the Bourne shell, I hope this serves as a simple example. Linux shell script while loop and sleep example When ten seconds has come and gone, the test in the while block is run again. I tell the sleep command to take a break for 10 seconds. After that, I give sendmail a second break by calling the Linux sleep command. A value of zero means it is finished doing all it can do, while any other number means it still has work to do, but stopped itself to give sendmail a break.
Sleeping in a shell script while loopĪs an example of both a while loop and sleep command, here is how my Email Agent program is now run from inside a Bourne shell script:īasically what happens is that my Email Agent program is called by my shell script, and then the Email Agent program returns a numeric value when it is finished running. Second, I pause the program by calling the Unix/Linux sleep command from my Bourne shell script. Because the program is written in Java, I accomplish that with the Thread.sleep call in my Java code. First, I try to get it to go through messages more slowly. To help keep sendmail alive, I slow my program down in two ways. A recent problem with the Agent is that it runs too fast, apparently overwhelming the sendmail process on the machine that it runs on. As a little background, I’ve written a program I call an Email Agent that periodically scans my email inbox, and does a lot of things to the inbox, including deleting the over 6,000 spams that I receive in a typical day. Linux shell script FAQ: Can you share a Linux shell script while loop example? While you’re at it, can you show how to use the sleep command in the shell script while loop?
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