PHP remove last zero from integer by substr -

in php values database integer, want remove last 0 20000000 integer, me below code doesnt work.

$payerd_amount = 20000000; $payerd_amount = substr((string)$payerd_amount,1,strlen((string)$payerd_amount) -1);

how action? code seems correct after substring result:

if want remove last zero, divide 10

   $payerd_amount = $payerd_amount / 10;

this works, too:

   $payerd_amount = substr($payerd_amount, 0, -1);

EEE