$myVariable1 = "(";
$myVariable2 = "a3bc123";
$myVariable3 = "ze3>1fg";
$myVariable4 = "35%cd:";

In case of myVariable1, it has a special character only, i.e. (.

In case of myVariable2, it has no special characters.

In case of myVariable3, it has a special character, i.e. >.

In case of myVariable4, it has some special characters, i.e. % and :.

I like to make a condition about myVariables has any special characters, i.e. (,),$,>,>,:,;,,,%,/.
if ( $myVariables has any special characters )
{ echo "yes"; }
{ echo "no;}
In case of myVariable1, myVariable3, and myVariable4, it says "yes".
and In case of myVariable2, it says "no".

How can I check myVariables has special characters or not?