How check input field is empty in php?

Is there a simpler function to something like this:

if [isset[$_POST['Submit']]] {
    if [$_POST['login'] == "" || $_POST['password'] == "" || $_POST['confirm'] == "" || $_POST['name'] == "" || $_POST['phone'] == "" || $_POST['email'] == ""] {
        echo "error: all fields are required";
    } else {
        echo "proceed...";
    }
}

Taryn

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asked Jul 6, 2010 at 21:42

Something like this:

// Required field names
$required = array['login', 'password', 'confirm', 'name', 'phone', 'email'];

// Loop over field names, make sure each one exists and is not empty
$error = false;
foreach[$required as $field] {
  if [empty[$_POST[$field]]] {
    $error = true;
  }
}

if [$error] {
  echo "All fields are required.";
} else {
  echo "Proceed...";
}

answered Jul 6, 2010 at 21:46

Harold1983-Harold1983-

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8

if[ isset[ $_POST['login'] ] &&  strlen[ $_POST['login'] ]]
{
  // valid $_POST['login'] is set and its value is greater than zero
}
else
{
  //error either $_POST['login'] is not set or $_POST['login'] is empty form field
}

answered Sep 18, 2012 at 21:54

Nahser BakhtNahser Bakht

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2

I use my own custom function...

public function areNull[] {
    if [func_num_args[] == 0] return false;
    $arguments = func_get_args[];
    foreach [$arguments as $argument]:
        if [is_null[$argument]] return true;
    endforeach;
    return false;
}
$var = areNull["username", "password", "etc"];

I'm sure it can easily be changed for you scenario. Basically it returns true if any of the values are NULL, so you could change it to empty or whatever.

answered Jul 6, 2010 at 21:50

animuson♦animuson

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empty and isset should do it.

if[!isset[$_POST['submit']]] exit[];

$vars = array['login', 'password','confirm', 'name', 'email', 'phone'];
$verified = TRUE;
foreach[$vars as $v] {
   if[!isset[$_POST[$v]] || empty[$_POST[$v]]] {
      $verified = FALSE;
   }
}
if[!$verified] {
  //error here...
  exit[];
}
//process here...

answered Jul 6, 2010 at 21:44

Jacob RelkinJacob Relkin

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2

I did it like this:

$missing = array[];
 foreach [$_POST as $key => $value] { if [$value == ""] { array_push[$missing, $key];}}
 if [count[$missing] > 0] {
  echo "Required fields found empty: ";
  foreach [$missing as $k => $v] { echo $v." ";}
  } else {
  unset[$missing];
  // do your stuff here with the $_POST
  }

answered Nov 4, 2013 at 0:03

I just wrote a quick function to do this. I needed it to handle many forms so I made it so it will accept a string separated by ','.

//function to make sure that all of the required fields of a post are sent. Returns True for error and False for NO error  
//accepts a string that is then parsed by "," into an array. The array is then checked for empty values.
function errorPOSTEmpty[$stringOfFields] {
        $error = false;
            if[!empty[$stringOfFields]] {
                // Required field names
                $required = explode[',',$stringOfFields];
                // Loop over field names
                foreach[$required as $field] {
                  // Make sure each one exists and is not empty
                  if [empty[$_POST[$field]]] {
                    $error = true;
                    // No need to continue loop if 1 is found.
                    break;
                  }
                }
            }
    return $error;
}

So you can enter this function in your code, and handle errors on a per page basis.

$postError = errorPOSTEmpty['login,password,confirm,name,phone,email'];

if [$postError === true] {
  ...error code...
} else {
  ...vars set goto POSTing code...
}

answered Feb 3, 2015 at 0:41

user1518699user1518699

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Note : Just be careful if 0 is an acceptable value for a required field. As @Harold1983- mentioned, these are treated as empty in PHP. For these kind of things we should use isset instead of empty.

$requestArr =  $_POST['data']// Requested data 
$requiredFields = ['emailType', 'emailSubtype'];
$missigFields = $this->checkRequiredFields[$requiredFields, $requestArr];

if [$missigFields] {
    $errorMsg = 'Following parmeters are mandatory: ' . $missigFields;
    return $errorMsg;
}

// Function  to check whether the required params is exists in the array or not.
private function checkRequiredFields[$requiredFields, $requestArr] {
    $missigFields = [];
    // Loop over the required fields and check whether the value is exist or not in the request params.
    foreach [$requiredFields as $field] {`enter code here`
        if [empty[$requestArr[$field]]] {
            array_push[$missigFields, $field];
        }
    }
    $missigFields = implode[', ', $missigFields];
    return $missigFields;
}

answered Dec 27, 2017 at 9:22

foreach[$_POST as $key=>$value]
{

   if[empty[trim[$value]]
        echo "$key input required of value ";

}

answered Aug 13, 2019 at 18:21

dılo sürücüdılo sürücü

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5

Personally I extract the POST array and then have if[!$login || !$password] then echo fill out the form :]

answered Jul 6, 2010 at 21:45

Doug MolineuxDoug Molineux

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2

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