How check array is null or not in php?

I have an array like below which is generated by parsing a xml url.

The array is

Array
  (
 [Tags] => SimpleXMLElement Object
    (
        [0] => 

    )
  )

The array name is $result. Now I want to check that if the array received like above I want to print a message of failure. But how to check this array in if condition?

Mosh Feu

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asked Nov 9, 2011 at 16:34

Manish JangirManish Jangir

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5

you can use

empty($result) 

to check if the main array is empty or not.

But since you have a SimpleXMLElement object, you need to query the object if it is empty or not. See http://www.php.net/manual/en/simplexmlelement.count.php

ex:

if (empty($result)) {
    return false;
}
if ( !($result['Tags'] instanceof SimpleXMLElement)) {
    return false;
}
return ($result['Tags']->count());

answered Nov 9, 2011 at 16:50

This checks if the variable is not set or contains a falsey value (zero, empty string, empty array, etc)

if (!empty($result) {
    // do stuff if the variable is not empty
} else {
    // do stuff if the variable is empty
}

This checks if the the variable is null

if (is_null($result) {
   // do stuff if the variable is null
} else {
   // do stuff if the variable is not null
}

answered Dec 23, 2016 at 6:17

Anish RaiAnish Rai

6909 silver badges16 bronze badges

Corrected;

/*
 return true if the array is not empty
 return false if it is empty
*/
function is_array_empty($arr){
  if(is_array($arr)){     
      foreach($arr as $key => $value){
          if(!empty($value) || $value != NULL || $value != ""){
              return true;
              break;//stop the process we have seen that at least 1 of the array has value so its not empty
          }
      }
      return false;
  }
}

answered Sep 13, 2013 at 21:00

WebbuWebbu

665 bronze badges

1

Right code of two ppl before ^_^

/* return true if values of array are empty
*/
function is_array_empty($arr){
   if(is_array($arr)){
      foreach($arr as $value){
         if(!empty($value)){
            return false;
         }
      }
   }
   return true;
}

answered Nov 10, 2017 at 16:14

I understand what you want. You want to check every data of the array if all of it is empty or at least 1 is not empty

Empty array

Array ( [Tags] => SimpleXMLElement Object ( [0] => ) )

Not an Empty array

Array ( [Tags] => SimpleXMLElement Object ( [0] =>,[1] => "s" ) )

I hope I am right. You can use this function to check every data of an array if at least 1 of them has a value.

/*
 return true if the array is not empty
 return false if it is empty
*/
function is_array_empty($arr){
  if(is_array($arr)){     
      foreach($arr $key => $value){
          if(!empty($value) || $value != NULL || $value != ""){
              return true;
              break;//stop the process we have seen that at least 1 of the array has value so its not empty
          }
      }
      return false;
  }
}

if(is_array_empty($result['Tags'])){
    //array is not empty
}else{
    //array is empty
}

Hope that helps.

answered Nov 9, 2011 at 21:51

if array is look like this [null] or [null, null] or [null, null, null, ...]

you can use implode:

implode is use for convert array to string.

if(implode(null,$arr)==null){
     //$arr is empty
}else{
     //$arr has some value rather than null
}

answered Jan 13, 2018 at 9:27

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