Implementing rate limiting in API calls to avoid excessive traffic.Using the function is controversial because some developers consider it a code smell. Developers use this function whenever they need to pause a script like requesting API calls to avoid excessive rate limits. PHP sleep() function delays the execution of a code in seconds. It was first introduced in PHP 4. Use the PHP Sleep Function in PHP What is the sleep() Function in PHP? Use the Sleep Function like Javascript setInterval.Use the Sleep Function like Javascript setTimeout. Use Sleep Function to Pause Running Code.setInterval() using sleep() initiates an infinite loop with no way of stopping it other than manually killing the program.It is not asynchronous, so setTimeout() and setInterval() may not make much sense. PHP doesn’t have an event loop out of the box. PHP sleep() function is not an asynchronous function therefore, it blocks the thread of execution.An asynchronous & non-blocking timer doesn’t block a thread but puts off the execution of a function for a defined timeout duration.Let’s quickly go through some highlights and clarify some presumptions. It is a synchronous and blocking timer that may surprise you if you switch from an async context. $GLOBALS->registerfunction("long Sleep (long dwMillisecods) From kernel32.PHP sleep() halts a running script for specific seconds. USleep alternative for Windows and PHP4: So I get with this snippet wich works fine for me, you get milliseconds precission but the more important, it works for long-run scripts and of course, it does not waste any CPU cycles. Though another solution should be found, and googling a bit I fount a WinAPI function: Sleep. I don't know if network connections go strange, but I know it does not work since you've made more than 2000 - 3000 calls to it, so it's not a reliable solution in 'long life' php scripts, or these are the issues of the microdelay function in my PHP and PHP-GTK applications. The Bernie's microdelay function using fsockopen does not work properly, and the fclose doesn't help much. If you're using Windows then you maybe are in trouble with usleep if you really need to use it. Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search
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