Invalid CRON field value

[Lukasss93]

Hello, quick question: why does Laravel throw an error if I try to set a cron like
5/15 * * * *? It’s a valid cron...
Crontab Guru says it’s fine (see screenshot).

Laravel gives me this error:

InvalidArgumentException
Invalid CRON field value 5/15 at position 0

This is the code inside console.php:

Schedule::command(CoolCommand::class)
    ->cron('5/15 * * * *');

[henzeb]

laravel's cron expression parser is very basic. I think it might not accept this syntax.

try this instead:

Schedule::command(CoolCommand::class)->cron('5,20,35,50 * * * *');

[Lukasss93]

thanks

[henzeb]

Did some more digging. The https://crontab.guru/#5/15__** crontab guru page says it is a non standard format.

The following is according to standards, according to https://crontab.guru/#5-59/15__**

Schedule::command(CoolCommand::class)->cron('5-59/15 * * * *');

So, whenever crontab guru says it is non standard, don't assume it works with Laravel, or anything else really.

for more information also see https://github.com/dragonmantank/cron-expression