newPost.php

<?php 
    session_start();
    $error = array();
    $photo = array();
    if(isset($_POST['submit'])){
        // saving the photos
        $j = 0;     // Variable for indexing uploaded image.
        
        for ($i = 0; $i < count($_FILES['file']['name']); $i++) {
            if($_FILES['file']['name'][$i]){
                // Loop to get individual element from the array
                $validextensions = array("jpeg", "jpg", "png");      // Extensions which are allowed.
                $ext = explode('.', basename($_FILES['file']['name'][$i]));   // Explode file name from dot(.)
                $target_path = "./uploads/";     // Declaring Path for uploaded images.
                $file_extension = strtolower(end($ext)); // Store extensions in the variable.
                $unique = md5(uniqid()) . "." . $ext[count($ext) - 1];
                $target_path = $target_path . $unique;     // Set the target path with a new name of image.
                $j = $j + 1;      // Increment the number of uploaded images according to the files in array.
                if (($_FILES["file"]["size"][$i] < 1000000)     // Approx. 100kb files can be uploaded.
                && in_array($file_extension, $validextensions)) {
                if (move_uploaded_file($_FILES['file']['tmp_name'][$i], $target_path)) {
                // If file moved to uploads folder.
                    $photo[] =  $unique;
                } else {     //  If File Was Not Moved.
                    $error[] =  $j. ').Please try again!.<br/>';
                }
                } else {     //   If File Size And File Type Was Incorrect.
                    $error[] =  $j. ').Invalid file Size or Type. <br/>'.$_FILES['file']['name'][0];
                }
            }
        }
        if(!empty($error)){
            $_SESSION['msg'] = $error[0];
            header("location:chat.php");
        }else{
        // making api call
        $images = serialize($photo);
        $url = 'http://api.saar.iitp.ac.in/createPost.php';
        $ch = curl_init($url);
        $data = array(
            'user_id' => $_POST['user_id'],
            'user_name' => $_POST['user_name'],
            'user_img' => $_POST['user_img'],
            'cat_id' => $_POST['cat_id'],
            'title' => $_POST['title'],
            'body' => $_POST['body'],
            'images' => $images
        );
        $payload = http_build_query($data);
        curl_setopt($ch, CURLOPT_POST, true);
        //attach encoded JSON string to the POST fields
        curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
        //return response instead of outputting
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        //execute the POST request
        $result = curl_exec($ch);
        //close cURL resource
        curl_close($ch);
	
        $response = json_decode($result,true);
        // echo $response['messages'][0];
        if($response['status'] == 209 || $response['status'] == 408){
            $_SESSION['msg'] = $response['messages'][0];
            header("location:chat.php");
        }
        }
    }
?>