Find Non Repetable element from an array using php | Learning Curve- Perfect Tutorial for the beginers

Please check the below php script to display non repetable element in an array.this script will remove all repetable elements and display remaining elements.

<?php
$first_array=array(1,2,3,4,1,2,3,4,5,9,10,3,67);
$count=count($first_array);
for($i=0;$i<$count;$i++){
            $check_exist = false;
            for($j=0;$j<$count;$j++){ 
			if($i!=$j)
			{
				 $result_array[$i]=$first_array[$i];
                if($first_array[$i] == $first_array[$j]){
                    
				   $result_array[$i]='';break;
                }
				
				
				
            }
			}
			echo "<br>";
           
        }
		
		 
		 foreach($result_array as $val)
		 {
		 echo $val;echo "<br>";
		 }

?>

<?php

$first_array=array(1,2,3,4,1,2,3,4,5,9,10,3,67);

$count=count($first_array);

for($i=0;$i<$count;$i++){

$check_exist = false;

for($j=0;$j<$count;$j++){

if($i!=$j)

{

$result_array[$i]=$first_array[$i];

if($first_array[$i] == $first_array[$j]){

$result_array[$i]='';break;

}

echo "<br>";

}

foreach($result_array as $val)

{

echo $val;echo "<br>";

}