Check if value is empty in a two dimensional array

Question

How to check if a single variable or single value is empty is array in a array or two dimensional array

Like this array

$resFirst=array(
    array(
        "course_name"   =>"a",
        "duration"      =>"b",
        "eligibility"   =>"",
        "recognition"   =>"d",
        "affiliation"   =>"c",
        "certificate"   =>"asd",
        "category"      =>"asd",
        "type"          =>"xcv",
        "school_batch"  =>"zv"
    ),
    array(
        "course_name"   =>"a",
        "duration"      =>"b",
        "eligibility"   =>"",
        "recognition"   =>"d",
        "affiliation"   =>"c",
        "certificate"   =>"asd",
        "category"      =>"asd",
        "type"          =>"xcv",
        "school_batch"  =>"zv"
    )
);

Or an array retrieved from database

To this, i want to check if $value['course_name'] == "" without putting alot of codes

 foreach ($resFirst as $key => $value) {
        echo"
        <h6> name:</h6><p>".        $value['course_name']."</p>
        <h6>Duration:</h6>".        $value['duration']."
        <h6> eligiblity:</h6><p>".  $value['eligibility']."</p>
        <h6>recognition:</h6><p>".  $value['recognition']."</p>
        <h6>Affiliation:</h6>".     $value['affiliation']."
        <h6> Certification:</h6>".  $value['certificate']."
        <h6>Category:</h6>".        $value['category']."     
        <h6>Type:</h6>".            $value['type']."
        <h6>Category:</h6>".        $value['school_batch'];
    }

So, what's the problem? Just use your condition within if statement. — Indrasis Datta
– Indrasis Datta, Commented Aug 29, 2016 at 9:05

Marcin Dargacz · Accepted Answer · 2016-08-29 09:18:46Z

2

My proposition is:

Define mapping key to title row. For example:

$mapKeyToTitle = array(
        'course_name' => 'name',
        'duration' => 'Duration',
        ...
    );

Next step: change code responsible for out data:

foreach ($resFirst as $row) {
         foreach ($row as $key => $column) {
             if (!empty($mapKeyToTitle[$key] && !empty($column)) {
                 echo "<h6> " . $mapKeyToTitle[$key] . ":</h6><p>". $column . "</p>";
             }
         }
     }

Thats all

edited Aug 29, 2016 at 9:18

answered Aug 29, 2016 at 9:13

Marcin Dargacz

1461 silver badge5 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Jovylle Over a year ago

Alright thanks This is it.and this will be mine

foreach ($resFirst as $key => $value) {         foreach($value as $key => $value2){             if($value2==""){                 $value[$key]="Field Not Set";             }         }     }

SumanKalyan · Accepted Answer · 2016-08-29 09:11:38Z

0

if (!empty($value['course_name']))
{
   // do somthing
}
else
{
   //do something
}

answered Aug 29, 2016 at 9:11

SumanKalyan

1,77116 silver badges24 bronze badges

1 Comment

Jovylle Over a year ago

thanks for the answer. this is very useful for single dimension array. need to be improved for two dimensional

SomeCode · Accepted Answer · 2016-08-29 09:17:15Z

0

You can use empty to check if a variable is empty, like this:

if (empty($value['course_name'])) {
    // Variable's empty!
} else {
    // Variable's not empty...
}

Or, as Object Manipulator pointed out, just use if ($value['course_name'] == '') { }.

edited Aug 29, 2016 at 9:17

answered Aug 29, 2016 at 9:11

SomeCode

3195 silver badges16 bronze badges

1 Comment

Jovylle Over a year ago

thanks for the answer. this is very useful for single dimension array. need to be improved for two dimensional

Community · Accepted Answer · 2017-05-23 12:01:02Z

If you are PHP 5.5+, you can use array_column to get all course_name in an array.

$resFirst=array(
    array(
        "course_name"   =>"a",
        "duration"      =>"b",
        "eligibility"   =>"",
        "recognition"   =>"d",
        "affiliation"   =>"c",
        "certificate"   =>"asd",
        "category"      =>"asd",
        "type"          =>"xcv",
        "school_batch"  =>"zv"
    ),
    array(
        "course_name"   =>"a",
        "duration"      =>"b",
        "eligibility"   =>"",
        "recognition"   =>"d",
        "affiliation"   =>"c",
        "certificate"   =>"asd",
        "category"      =>"asd",
        "type"          =>"xcv",
        "school_batch"  =>"zv"
    )
);

$course_name = array_column($resFirst, 'course_name');

then,

// if array has any empty value(means any one 'course_name' is empty)
if(array_search("", $course_name) !== false){
    // your code
}

Reference:

UPDATE:

I think I found a similar solution from one of the comments in PHP Docs(its very similar to my answer though, just less code):

in (PHP 5 >= 5.5.0) you don't have to write your own function to search through a multi dimensional array

ex :

$userdb=Array
(
    (0) => Array
        (
            (uid) => '100',
            (name) => 'Sandra Shush',
            (url) => 'urlof100'
        ),

    (1) => Array
        (
            (uid) => '5465',
            (name) => 'Stefanie Mcmohn',
            (pic_square) => 'urlof100'
        ),

    (2) => Array
        (
            (uid) => '40489',
            (name) => 'Michael',
            (pic_square) => 'urlof40489'
        )
);

simply u can use this

$key = array_search(40489, array_column($userdb, 'uid'));

Collectives™ on Stack Overflow

Check if value is empty in a two dimensional array

4 Answers 4

1 Comment

1 Comment

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

1 Comment

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related