Warning: Invalid argument supplied for foreach() in php

Question 1

I am working to upload a file and then send it to myself as an attachment. I am new with php, I tried lookign up on the web for stuff and wrote this code.

 <?php
    function mail_attachment($files, $path, $mailto, $subject, $message) {

$uid = md5(uniqid(time()));
$header = "MIME-Version: 1.0rn";
$header .= "Content-Type: multipart/mixed; boundary="".$uid.""rnrn";
$header .= "This is a multi-part message in MIME format.rn";
$header .= "Content-type:text/plain; charset=iso-8859-1rn";
$header .= "Content-Transfer-Encoding: 7bitrnrn";
$header .= $message."rnrn";

foreach ($files as $filename) { 

    $file = $path.$filename;
    $name = basename($file);
    $file_size = filesize($file);
    $handle = fopen($file, "r");
    $content = fread($handle, $file_size);
    fclose($handle);
    $content = chunk_split(base64_encode($content));

    $header .= "--".$uid."rn";
    $header .= "Content-Type: application/octet-stream; name="".$filename.""rn"; // use different content types here
    $header .= "Content-Transfer-Encoding: base64rn";
    $header .= "Content-Disposition: attachment; filename="".$filename.""rnrn";
    $header .= $content."rnrn";
}

$header .= "--".$uid."--";
if (@mail($mailto, $subject, $message, $header)) {
    echo "mail send ... OK";
} else {
    echo "mail send ... ERROR!";
}
}



   //Enter your email address here
  $mailto="[email protected]";
  $subject="Form Details";

   $FirstName = $_POST['firstName'] ;
   $LastName = $_POST['lastName'] ;
$EmailAdress= $_POST['emailAddress'] ;
   $ContactNumber= $_POST['contactNumber'] ;
   $ApartmentType= $_POST['apartmentType'] ;
   $ApartmentLocation = $_POST['apartmentLocation'] ;
   $CheckIn = $_POST['checkIn'] ;
   $CheckOut = $_POST['checkOut'] ;
   $NumberOfAdults = $_POST['numberOfAdults'] ;
   $NumberOfChildren = $_POST['numberOfChildren'] ;
   $TermsAndConditions =$_POST['termsAndConditions'];

   $required = array('firstName','lastName','emailAddress','contactNumber','apartmentType','apartmentLocation','checkIn','checkOut','numberOfAdults','numberOfChildren');

   $error = false;

   foreach($required as $field) {
     if (empty($_POST[$field])) {
       $error = true;
     }
   }

   if ($error) {
     echo "All fields are required.";
     exit;
   } 

   if ( $TermsAndConditions=='disagree') {
     echo "Please agree to the terms and conditions";
     exit;
   }

    $message="First Name:t $FirstName nn" . 
"Last Name:t $LastNamenn". 
"Email Address:t $EmailAddress nn". 
"Contact Number:t $ContactNumber nn". 
"Apartment Types:t $ApartmentType nn". 
"Apartment Location:t $ApartmentLocation nn" .
"Check in:t $CheckIn nn" .
"Check out:t $CheckOut nn" .
"Number of Adults:t $NumberOfAdults nn" .
"Number of Children:t $NumberOfChildren nn";

   $uploaddir = './';
   $x=0;
   foreach ($_FILES["documents"]["error"] as $key => $error) 
   {
   if ($error == UPLOAD_ERR_OK) {
    $tmp_name = $_FILES["documents"]["tmp_name"][$key];
    $name = basename($_FILES["pictures"]["name"][$key]);
$files[$x]=$name;
$x++;
    move_uploaded_file($tmp_name, $uploaddir.$name);
       }
   }

   $path = $_SERVER['DOCUMENT_ROOT'];
   mail_attachment($files, $path, $mailto, $subject, $message);


   ?>

I get an error for both the foreach:

  Warning: Invalid argument supplied for foreach() in /home/a4824849/public_html/PhpFile.php on line 88

 Warning: Invalid argument supplied for foreach() in /home/a4824849/public_html/PhpFile.php on line 12

What could possibly be wrong?

Question 2

Foreach takes arrays and attributes each value of the array to the varname that you define. Invalid Argument simply means that the you did not provide a valid array.

For l.12, it simply means that you did not pass an array as the first arg to your function, which is due to your error line 88.

I would assume that your problem is that you haven't yet tried uploading a file and thus $_FILES is undefined. In my experience to use the $_FILES superglobal variable you usually have to upload a file via a form of enctype multi-part/formdata. To debug and check if it's defined do a var_dump or print_r on $_FILES before your foreach loop. As an added measure of security you might want to wrap said loop and your call to your mail_attachment function in an if (isset($_FILES))

Hope this helps

Question 3

You're looking for the array_slice function:

array_slice() returns the sequence of elements from the array array as specified by the offset...

$lines = file(...);
$lines = array_slice($lines, -50);

Question 4

You should open and close your <rows/> in the books loop, and add a late check for odd books:

<?php 
$count = 0;
foreach ($contents as $content) 
{
    //var_dump($content);
    $books      = $content["tags"];
    $book_image = $content['content_image'];
    $book_desc  = $content['content_social_description'];


    foreach ($books as $book) 
    {
        ++$count;
        if($count == 1)
        {  
            echo "<div class='et_pb_row'>";
        }
        $book_name      = $book['tag_name'];
        $book_name_trim = str_replace(' ', '-', $book_name);
        ?>
        <!-- Inside the Book Loop -->
        <div class='et_pb_column et_pb_column_1_2 books' style="background: url('https://s3-us-west-2.amazonaws.com/crowdhubproverbs31/<?php echo $book_image ;?>');">
            <h2><?php echo $book_name; ?></h2>
            <p><?php echo $book_desc; ?></p>
            <?php echo $count; ?>
        </div>

        <?php
        if ($count == 2)
        {
            echo "</div>";
            $count = 0;
        }


    }
}

if ($count > 0)
{
    echo "</div>";
}
?>

Doing so, your $count variable will be incremented only when foreach($books AS $book) loop is run (thus you have at least one book to print)

Question 5

you need to do a check before starting to iterate for the data, like: model code:

public function getAll() {
    $results = array();
    $this->db->select('bcode, bname, btel, badd');
    $this->db->from('branches');

    $query = $this->db->get();

    if($query->num_rows() > 0) {
        $results = $query->result();
    }
    return $results;
}

view code:

if( !empty($results) ) {
    foreach($results as $row) {
        echo '<tr>';
        echo '<td>'.$row->bcode.'</td>';
        echo '<td>'.$row->bname.'</td>';
        echo '<td>'.$row->btel.'</td>';
        echo '<td>'.$row->badd.'</td>';
        echo '</tr>';
    }
}

Question 6

function getSearchUniversity() {
  country = jQuery('[name=countryKey]').val();
  state = jQuery('[name=stateKey]').val();
  level= jQuery('[name=level]').val();
  degType= jQuery('[name=degType]').val();
  jQuery.ajax({
    type: "POST",
    url:baseurl+ 'welcome/searchUnivtab', 
    cache: false,
    data: {countryKey: country, stateKey: state, level: level, degType: degType},
    error: function()
    {
      //notify('Error: Your request could be processed.. try again..!!');
    },
    success: function(html)
    {
      jQuery('[name=universityList]').html(html);
      return false;
    }
  }); 
}

Warning: Invalid argument supplied for foreach() in php

Answers

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