ok a little more help please

[donkru]

ok here i am, i want to make an if statement that only works when i have over x amount of characters in a string, how will i go about that?
example

if($message < 300 *\characters*){ echo 'blah';};

i just want to know how to calculate the characters inside $message, and the if its more than 300 echo 'blah'

thanks

[laserlight]

Use [man]strlen/man

[donkru]

thnxs