The difference between operators (== and ===) 
              
              
             
            
              
              //if we use == sign it doesn't check the type of data apart from === sign which check also type of data
<?php
  
$a = 34;
$b = 34;
if($a == $b) {
    echo "Equal";
}
else{
    echo "Not Equal";
}
//answer will be "Equal" true
  
if('34' == 34){
    echo "Equal";
}
else{
    echo "Not Equal";
}
  //answer will be "Equal"
if('34' == 34){
    echo "Equal";
}
else{
    echo "Not Equal";
}
  //answer will be "Not Equal" because types of variables isn't equal to each others
?>