substract 1 minute from user input minutes

[dsp77]

I have a dilemma i have a input text field where the user inserts an hour and minutes like 12:00 and i want to save it in the data base like 11:59 and then display the correct hour like 12:00

[cags]

Something like this should allow you to minus one minute from an inputted time.

 

$var = '12:00';
echo date("H:i", strtotime($var . ' -1 minutes'));