Select case with array - php

Question

How can I write a select case with an array to check form validation?
this is my code:
$name = $_POST["name"];
$email = $_POST["email"];
$message = $_POST["message"];
$array = array($name,$email,$message);
switch($array[]) {
case empty($array[0]):
error = "name";
break;
case empty($array[1]):
error = "email";
break;
case empty($array[2]):
error = "message";
}
Then, I would like to write code to have this result:
if name is empty:
"Please fill in your name"
if email is empty:
"Please fill in your email"
if name and email is empty:
"Please fill your name and email"
if name and email and message is empty:
"Please fill in your name, email and message"

Answer 1

You want to concat your messages, so better use if statements:
$error = "Please fill in: ";
if (empty($array[0]))
$error .= "name ";
if (empty($array[1]))
$error .= "email ";
if (empty($array[2]))
$error .= "message ";
The .= will concat the string to the existing one.

Answer 2

Try this for a grammatically correct solution:
$empty = array();
$fields = array('name', 'email', 'message');
foreach ($fields as $key => $value){
if(empty($_POST[$value])) $empty[] = $value;
}
$error_msg = '';
$count = count($empty);
$cnct = ', ';
if ($count > 0){
$error_msg = 'Please fill in your ';
}
foreach ($empty as $key => $value){
if ($key == $count - 2){
$cnct = ' and ';
}elseif($key == $count - 1){
$cnct = '.';
}
$error_msg .= $value.$cnct;
}

Answer 3

You can simply try:
$name = $_POST["name"];
$email = $_POST["email"];
$message = $_POST["message"];
$error="Please fill in your ";
$array = array('name'=>$name,'email'=>$email,'message'=>$message);
foreach($array as $key=>$value){
if(empty($value)){
$error.=','.$key;
}
}

Answer 4

You can't use a variable expression in case statement of switch block.
A switch case must have a constant expression in many languages including php. So, something like a variable or function call doesn't work.
You better use conditionals for this.
Your code is also missing $ symbol for variable error.
Do this instead:
$name = $_POST["name"];
$email = $_POST["email"];
$message = $_POST["message"];
$array = array($name,$email,$message);
$error="Please fill in your ";
if(empty($array[0])){
$error.= "\nname";
}
if(empty($array[1])){
$error.="\nemail";
};
if(empty($array[2])){
$error.= "\nmessage";
}
echo $error;

Answer 5

You should simply write:
$error = "Please fill in: ";
if (empty($array[0]))
$error.= "name ";
if (empty($array[1]))
$error.= "email ";
if (empty($array[2]))
$error.= "message";
A switch isn't made for what you want to do.