Member Avatar for geekme

The following id my php code

<html>
 <head>
  Checking !
 </head>
<body>
 <?php
  $errors_array=array();
  if(isset($_REQUEST["welcome_already_seen"])){
    check_data();
    if(count($error_array)!=0){
      show_error();
      show_welcum();
     }
    else{
     handle();
     }
}
else {
    show_welcum();
}
   function show_welcum(){
   echo "<form method='post'>";
   echo "What's your ice cream flavour?";
   echo "<br>";
   echo "<input name='flavor' type='text'>";
   echo "<br>";
   echo "<input type='submit' value='send'>";
   echo "<br>";
   echo "<input type='hidden' name='welcum'>";
   echo "</form>";
  }
 function check_data(){
  global $error_array;
  if($_REQUEST["flavour"]==""){
   echo "<font color='red'> Please enter a value </font>";
 }
}
function show_error(){
 global $error_array;
 foreach($error_array as $err){
 echo $err,"<br>";
}
}
function handle(){
echo "your favourite ice cream flavour is ";
echo $_REQUEST["flavour"];
?>
</body>
</html>

but when I run it on the browser , it shows a blank screen, why?

Edited by Ezzaral because: Added code tags. Please use them to format any code that you post.
  • 3 Contributors
  • 9 Replies
  • 181 Views
  • 1 Week Discussion Span
  • Latest Post Latest Post by urtrivedi

Dani AI

Generated

A blank page almost always means PHP hit a fatal/parse error that the server is hiding. Some fixes are already identified in the thread: caught the incorrect variable name and the $this usage, and spotted the missing brace. Add these checks next because they’re the usual culprits in the posted snippets: inconsistent variable names ($errors_array vs $error_array), mismatched form field spelling ('flavor' in the form but code checks 'flavour'), and the hidden field named 'welcum' while the code tests for 'welcome_already_seen'. Any one of those will stop execution.

Turn on full error reporting while developing so you see the real problem:

<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
?>

Also dump incoming data to confirm what the form is sending:

<?php
var_dump($_REQUEST); // or var_dump($_POST);
?>

Practical checklist to get this thread’s examples working

  • Make names consistent: if the form uses name="flavor" check $_POST['flavor'] (or change the form to match the code). Use $_POST instead of $_REQUEST for clarity.
  • Hidden flag: give it the same name and a value so isset() works, e.g. <input type='hidden' name='welcome_already_seen' value='1'>.
  • Errors array: declare and use the same variable ($error_array) and push messages with $error_array[] = 'Please enter a value';.
  • Braces and PHP tags: a missing } or stray ?> in the wrong place produces a parse error; count your braces or use an editor that highlights matching braces.
  • Classes/magic methods: use $this->prop (not this->), function __call($method, $arguments) (note the dollar signs), compare $method == 'set_msg' (string), and index $arguments[0]/[1].

If problems persist, check the webserver/php error log and use a syntax-aware editor (VS Code, PhpStorm, or similar). Leaving display_errors enabled on a public site is unsafe — use it only in development.

Recommended Answers

All 9 Replies

Member Avatar for urtrivedi

remove 's' from line 7
it should look like below

$error_array=array();
Member Avatar for divyakrishnan

Also put a closing brace '}' on line no 47

Edited by divyakrishnan because: n/a
commented: useful +5
Member Avatar for geekme

Thanks that did work.can you please help me with this code, what is the possible error ,i f=get a blank screen in my browser .
<html>
<head>
Creating objects
</head>
<body>
<?php
class Objects{
var $name;
function set_name($na){
this->$name= $na;
}
function get_name(){
return this->$name;
}
}
$ob=new Objects;
$ob->set_name("ila");
echo "the name of greatest person alive is ",$ob->get_name();
?>
</body>
</html>

Member Avatar for urtrivedi

Make sure you write $this->name and NOT $this->$name.

<html>
<head>
Creating objects
</head>
<body>
<?php
class Objects
{
	var $name;

	function set_name($na)
	{
		$this->name= $na;
	}
	
	function get_name()
	{
		return $this->name;
	}
}

$ob=new Objects;
$ob->set_name("ila");
echo "the name of greatest person alive is ",$ob->get_name();

?>
</body>
</html>
Member Avatar for geekme

Thanks a lot.

Member Avatar for geekme

<html>
<head>
</h1>Overloading tym!</h1>
</head>
<body>
<?php
class demo{
var $name;
var $msg;
function set_msg($data, $m){
$this->name=$data;
$this->msg=$m;
}
function set_name($data){
$this->name=$data;
}
function speak(){
echo $this->name,"hi!",$this->msg,"...","<br>";
}
function __call($method,$argument){
if ($method==set_msg){
if(count(argument)==1){
$this->name=argument[0];
}
if(count(argument)==2){
$this->name=argument[0];
$this->msg=argument[1];
}
}
}
}
$d=new demo;
$d->set_msg("ila","hello");
echo $d->speak();
?>
</body>
</html>
Kindly tell error in this code.

Member Avatar for urtrivedi 
if(count($argument)==1)
			{
				$this->name=$argument[0];
			}
			if(count($argument)==2)
			{
				$this->name=$argument[0];
				$this->msg=$argument[1];
			}

Here you have not written $ sign before argument. In my previous post I suggest about position of dollar sign. So Here this->name is different then argument, so both will start with dollar sign.

Edited by urtrivedi because: n/a
Member Avatar for geekme

<html>
<head>
<h3> yups working with static property</h3>
</head>
<body>
<?php
class demo{
static $data;
static function demoagain($name){
self::$data=$name;
echo "so the value is", self::$data,"<br>";
self::$data++;
echo "the new value is", self::$data,"<br">;
}
}
demo::demoagain(13);
?>
</body>
</html>
please tell the error in this code.

Member Avatar for urtrivedi

Download php designer 2007 for free, its php editor that will help you to find syntax errors.

Edited by urtrivedi because: n/a
Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.