Java convert to PHP masters please Help!!!!?

[super_saiyan_alazar]

import java.awt.*;
import javax.swing.*;
public class gradesArray extends JApplet{
int grades[][]={{77,68,86,}, {96,87,89},{70,90,86}};
int students,exams;
String output;
JTextArea outputArea;
public void init(){
students=grades.length;
exams=grades[0].length;
outputArea=new JTextArea();
Container container=getContentPane();
container.add(outputArea);
output="The array is:\n";
buildString();
output+="\n\nLowest grade:"+minimum()+"\n\nHighest grade:"+maximum()+"\n";
for (int counter=0; counter<students;counter++)
output+="\nAverage for student"+counter+"is"+average(grades[counter]);
outputArea.setFont(new Font("Tahoma", Font.PLAIN,12));
outputArea.setText(output);
}
public int minimum(){
int lowGrade=grades[0][0];
for(int row=0; row<students;row++)
for(int column=0; column<exams;column++)
if (grades[row][column]<lowGrade)
lowGrade=grades[row][column];
return lowGrade;
}
public int maximum(){
int highGrade=grades[0][0];
for(int row=0; row<students;row++)
for(int column=0; column<exams;column++)
if (grades[row][column]>highGrade)
highGrade=grades[row][column];
return highGrade;
}
public double average(int setOfGrades[]){
int total=0;
for(int count=0;count<setOfGrades.length;count++)
total+=setOfGrades[count];
return (double)total/setOfGrades.length;
}
public void buildString(){
output+=" ";
for(int counter=0;counter<exams;counter++)
output+="["+counter+"] ";
for (int row=0;row<students;row++){
output+="\ngrades["+grades[row]+"] ";
for (int column=0;column<exams;column++)
output+=grades[row][column]+" ";
}
}
}

this is my code.... can somebody tell me or convert this output for me to PHP please It's urgent please help me OH GOD please