[PHP] Proper Way To Check For POST?

What's the proper way to check to see if POST data was submitted?

if($_POST) doesnt work and if($_POST['submit']) doesnt work if I had a submit button named submit.

PHP Code:

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if ($_POST)
{
   // Post submited
} 


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That works for me also.

PHP Code:

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if (empty($_POST) === false)
{
   // Post submited
} 


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But I usually do..

PHP Code:

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if (isset($_POST['submit']))
{
   // Post submited
} 


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So yeah, look into empty and isset functions.

Usually I use.

PHP Code:

---

if (empty($var)) //Define your variable here
{

} 


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Use Iszaks or use

PHP Code:

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if( $_POST['variable'] != '' )
{
// posted
} 


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if($_POST) and if(isset($_POST['submit']) don't work for me... they just refresh the page

Quote:

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Originally Posted by Fazon

if($_POST) and if(isset($_POST['submit']) don't work for me... they just refresh the page

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if(!$_POST)

isn't

if($_POST) {
// process info
} else {
// error msg
}

and

if(!$_POST) {
// error
} else {
// process data
}

the same?

Quote:

---

Originally Posted by Fazon

isn't

if($_POST) {
// process info
} else {
// error msg
}

and

if(!$_POST) {
// error
} else {
// process data
}

the same?

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Yeah, just in reverse order. But what I was saying is if you're wanting to check if data is empty, use either the empty function or !$_POST['lol']. You need to make sure they're submitting the form by doing something like:

PHP Code:

---

if(isset($_POST['form']))
{

} 


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That will check if they have posted the form. On the submit name just add 'form'.

This isn't the best method but it'll work.

Edit: Oh and add the method as POST.

Same problem. Page just refreshes.

For example:

PHP Code:

---

<?php
if(!$_POST) {
 echo "hi $_POST['name']";
} else {
echo '
 <form method="post" enctype="text/plain">
 Name: <input type="text" name="name"> <br />
 <input type="submit" value="Submit" name="submit">
 </form>
';
?>

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same with isset

Quote:

---

Originally Posted by Fazon

Same problem. Page just refreshes.

For example:

PHP Code:

---

<?php
if(!$_POST) {
 echo "hi $_POST['name']";
} else {
echo '
 <form method="post" enctype="text/plain">
 Name: <input type="text" name="name"> <br />
 <input type="submit" value="Submit" name="submit">
 </form>
';
?>

---

same with isset

---

PHP Code:

---

 <?php
if($_POST) {
 echo "hi $_POST['name']";
} else {
echo '
 <form method="post" enctype="text/plain">
 Name: <input type="text" name="name"> <br />
 <input type="submit" value="Submit" name="submit">
 </form>
';
?>

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