Get this error while creating rrule object from this string - <code

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DTSTART cannot be part of RRULE about php-rrule HOT 4 CLOSED

rlanvin commented on August 28, 2024

DTSTART cannot be part of RRULE

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Comments (4)

rlanvin commented on August 28, 2024 1

This is the intended behavior. As the notice says, your RRULE string is not compliant with the RFC. The lib accepts it only because some other libs (such as the JS lib) generates strings like that... Thank you for the preg_replace code.

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rlanvin commented on August 28, 2024 1

You could also do:

$rrule = @ new RRule($broken_string); // use @ to mute the notice
$correct_string = $rrule->rfcString(); // will return the RFC-compliant version

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devvpm commented on August 28, 2024

This fixed the issue.
preg_replace("/DTSTART=(.*?);/",'DTSTART:${1}'."\nRRULE:",$rrule)

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devvpm commented on August 28, 2024

However, That preg_replace is not complete. It expects the DTSTART to be at the beginning of the rrule string, which is not the case always.

So I wrote this function which will return the rrule in the standard format.

public function getRecurringRule()
	{
		$rruleParts = explode(';',$this->rrule);
		$startDateIndex = 0;
		foreach($rruleParts as $i=>$rrulePart)
		{
			if(stristr($rrulePart,'DTSTART='))
			{
				$startDateIndex = $i;
				break;
			}
		}
		if($startDateIndex > 0)
		{
			$dateStartElement = $rruleParts[$startDateIndex];
			unset($rruleParts[$startDateIndex]);
			array_unshift($rruleParts , $dateStartElement);
			$rruleFormatted = implode(';',$rruleParts);
		} else {
			$rruleFormatted = $this->rrule;
		}

		return  preg_replace("/DTSTART=(.*?);/",'DTSTART:${1}'."\nRRULE:",$rruleFormatted);
  }

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