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Validating Crontab Entries w/ PHP
I have search everywhere, and my Regex is poor, so i seek assistance.
I am building a web based CRON tool, and the form can and will only pass the following to the processing script.'0-99' ',' '*' '-' '/'
I wan to validate the input with a simple preg_match in PHP, but cannot seem to come up with the correct regex. Can some one help out? Also, i will validate each item in the cron i.e. NOT * * * * * but rather the minutes value, then the hours value etc.. This allows more specific errors to be sent back.
examples of the passed values would be
*
0,10
*/5
1,3,5
1-5
here is a poor attempt just to match digits and the * /[0-9*]/ Any assistance would be great.
Regards