The solution to this problem is to download the files
JavaBridge.jar
,
php-script.jar
and
php-servlet.jar
from
HERE then import them into your class:
import javax.script.*;
import php.java.bridge.*;
import php.java.script.*;
import php.java.servlet.*;
String code="echo 5+5;";
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByExtension("php");
try {
engine.eval(code);
} catch (ScriptException ex) {
}