Paul Van Walleghem is the Dental Director of Pointe Dental Sleep Medicine and has treated patients for snoring and Obstructive Sleep Apnea for 25 years. Paul Van WalleghemĪt Pointe Dental Group, we offer specialized treatment for sleep apnea.ĭr. In this scenario, you can use the PHP sleep() function after the execution of some batch process and give the database server a chance to fulfill any pending request.Sleep Apnea Dentist: Dr. But a lot of updates have to be done simultaneously, which can cause the database server to down. Let's say you are running some batch process that heavily uses a resource.So in this scenario, you can create delays between consecutive requests using the PHP sleep() function. Suppose you have created a web crawler that uses the file_get_contents() function to obtain remote pages, and you do not want to bombard remote servers with too many requests in a short period of time.Usually, we do not know when this function will be used, so here are some scenarios where this function would be fit to use.
The sleep() Function ExampleĪn example of using this sleep() function is as follows:Įxample: Practical Scenario to Use for PHP sleep() Function
#Php sleep alternative windows
The sleep() function will always return a NULL (in the Windows platform, before PHP 5.3.4) if that particular script has a sleep occurred, irrespective of whether the function was previously interrupted or not. When the seconds' parameter is passed with a negative value, this function usually generates an E_WARNING. When there is an interrupted call by a signal, the sleep()will return a non-zero value. Let's discuss various scenarios when these exceptions and errors pop up. If certain circumstances arise when using this function, it can cause exceptions. Exceptions, Errors, and Different Scenarios Encountered by Sleep() Function The seconds' parameter is a mandatory one, and one must specify the value for using this function. If the number of seconds is given in negative, then this function will throw an error. Here, seconds is where you have to specify the number of seconds for which your current script will delay its execution. In other operating systems, this function will return the number of seconds that is left to sleep. If you are a Windows user, your value will always appear to be 192 that is actually the value of WAIT_IO_COMPLETION. This function takes the number of seconds as its parameter and will return TRUE if it succeeds and FALSE when a failure occurs.Ī non-zero value will be returned when the call gets interrupted by a signal. Sleep() function is one of the important built-in functions provided by PHP version 4.0 or above to delay any script's execution process for a certain time interval. In this tutorial, you will learn about the sleep() function that helps delay any PHP script execution. This has become possible because of the powerful systems coming in these days and your computer's ability to perform multiprogramming. PHP Overview PHP Tutorial PHP Introduction PHP Installation PHP Basics PHP Basics PHP Syntax PHP Data Types PHP Variables PHP Constants PHP Print and Echo Statements Operators PHP Operators PHP Arithmetic Operators PHP Assignment Operators PHP Comparison Operators PHP Logical Operators PHP Ternary Operator PHP Concatenation Operators Decision Control Structures PHP Decision Making PHP if else statement PHP elseif statement PHP switch statement Loop Control Structures PHP Looping PHP while loop PHP do-while PHP for loop PHP foreach loop Functions PHP Date and Time PHP Functions PHP String Handling Functions PHP Include and Require PHP Headers PHP File Handling PHP Cookies PHP Sessions PHP Sending Emails Compare Strings In PHP array_diff() Function in PHP array_merge() Function in PHP array_search() Function in PHP eval() in PHP preg_replace() Function in PHP URL Encoding and Decoding with PHP sleep() Function in PHP strlen() Function in PHP ksort() Function in PHP strlen() Function in PHP gettype() Function in PHP Forms PHP GET and POST PHP Server Side Form Validation PHP File Upload PHP Classes and Objects PHP OOP Terminology PHP Access Modifiers What is stdClass in PHP? PHP Inheritance PHP OOP Traits PHP Abstract Classes PHP Constructor PHP Destructor Miscellaneous PHP Arrays PHP RSS Feed PHP Composer Environment Variables in PHP PHP Error HandlingĪs you all know that modern computer programming allows us to execute multiple scripts simultaneously.
0 kommentar(er)
