php - set interval

[Andrew <andrew123@xxxxxxxxxxxxxx>]

hello,

i've been searching for a 'setInterval' function in php and haven't had 
much luck.


in actionscript (which is similar to php) you can make a function which 
calls another function at a set interval, and i was keen to do this with 
php for a mail script so that rather than sending 500 emails at once, i 
can send 10 emails every 10 seconds etc.

i'm currently thinking i'll have to use flash to make the interval, but 
would rather keep it all in php.

basically what i want to do is this.


function SendMail($howManyToSend, $fromWhatIndex){
	// gets the number of email addresses ($howManyToSend)
	// from the database, starting at index $fromWhatIndex
	// then sends them
	
	if(all emails sent, no more emails in DB){
		return 'finished';
	}else{
		return 'keep them coming';	
	}
}

function IntervalCalled (){
	
	// increment currentIndex
	$currentIndex = $currentIndex + 10;

	$howDidWeGo = SendMail(10, $currentIndex);

	if($howDidWeGo == "finished"){
		// FLASH CLEARINTERVAL COMMAND
		clearInterval($makeEmailsInterval);
	}

}

// THIS IS HOW I WOULD CALL THE INTERVAL IN FLASH
// (for every 10 seconds)

$makeEmailsInterval = setInterval(IntervalCalled, 10000);




so is this possible with PHP by using functions? anything involving 
complicated server stuff means i may as well setup flash to call the 
interval instead of PHP


many thanks

andrew

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