Invalid Argument Supplied For Foreach()

Invalid argument supplied for foreach()

Personally I find this to be the most clean - not sure if it's the most efficient, mind!

if (is_array($values) || is_object($values))
{
    foreach ($values as $value)
    {
        ...
    }
}

The reason for my preference is it doesn't allocate an empty array when you've got nothing to begin with anyway.

Why Invalid argument supplied for foreach()

Your code and your image do not seem the same.

On your code, just do var_dump($aa) before foreach($aa AS $key => $val){.
And check if your variable has array value or not because that error message suggests that the variable $aa doesn't have any array data.

On your image, change your code variable $id to $data on your foreach because $id isn't array type. $id is just variable.

Warning: Invalid argument supplied for foreach() in... php

You should use is_array and count for checking whether a variable is array or not and whether it is an empty array or not.

<?php

$data = $_POST;

if (count($data) > 1)
{
    var_dump($data);

    foreach ($data as $k => $row)
    {
        var_dump($row);

        if(is_array($row) && count($row)>0)//you should add this.
        {
            foreach ($row as $k2 => $img)
            {
                echo $img;
            }
        }
    }
}

Why always Invalid argument supplied for foreach

Change foreach($data as $data){ ....} to

if ( is_array($data) ) {
   foreach($data as $item){
      $id_reservasi[] = $item->id_reservasi;
      $stok[] = (float) $item->stok;
   }
}

or change your function get_chart to always return array:

function get_chart(){
    $hasil = [];
    $query = $this->db->query("SELECT id_reservasi,SUM(status_reservasi) AS stok FROM tbl_reservasi GROUP BY id_reservasi");          
    if($query->num_rows() > 0){
        foreach($query->result() as $data){
             $hasil[] = $data;
        }
    }
    return $hasil;
}

foreach help

Invalid argument supplied for foreach() : Yii2

Since $plusone_subjects is not valid json, you can manually change it to valid json and then convert it to an array like so:

$plusone_subjects = "[$plusone_subjects]"; //covert string to valid json;
$plusone_subjects = json_decode($plusone_subjects,true); //covert to array

foreach ($plusone_subjects as $subject)
{
    echo $subject["subject_name"]; 
}

Invalid argument supplied for foreach() in Laravel 8

You can pass data to the view using the with method.

Try this:

public function index() 
  {  $posts = Post::all();
      return view('posts.index')->with(compact('posts'));
   }

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