str_replace - Hoe gebruik ik het (Opgelost)

<?php
if($_SERVER['REQUEST_METHOD'] == 'POST'){
  if(isset($_GET['post'])){
    if(!empty($_POST['msg'] && !empty($_POST['name'])){
      //HIER DE STR_REPLACE!!
      //Het script
    }
    else{
      echo $lang->user['not_all'];
    }
  }
  else{
    echo $lang->user['no_post_id'];
  }
}
else{
  header('location: index.php');
}
?>

<?php
if($_SERVER['REQUEST_METHOD'] == 'POST'){
  if(isset($_GET['post'])){
    if(!empty($_POST['msg'] && !empty($_POST['name'])){
      //HIER DE STR_REPLACE!!
      //Het script
    }
    else{
      echo $lang->user['not_all'];
    }
  }
  else{
    echo $lang->user['no_post_id'];
  }
}
else{
  header('location: index.php');
}
?>