[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:

---

if ($_POST)
{
   // Post submited
} 


---

That works for me also.

PHP Code:

---

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


---

But I usually do..

PHP Code:

---

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


---

So yeah, look into empty and isset functions.

Usually I use.

PHP Code:

---

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

} 


---

Use Iszaks or use

PHP Code:

---

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


---

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?

---

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']))
{

} 


---

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>
';
?>

---

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>
';
?>

---

Sounds like you're on a bad host, hearing all of the problems that you've had with PHP.

Quote:

---

Originally Posted by Calgon

Sounds like you're on a bad host, hearing all of the problems that you've had with PHP.

---

Or he just can't code PHP...

Quote:

---

Originally Posted by Ible

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>
';
?>

---

---

oh yer that ! was a typo. that still doesn't work.

@blob: if you're so good why don't you help me by telling me what I did wrong instead of insulting me?

Quote:

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Originally Posted by Fazon

oh yer that ! was a typo. that still doesn't work.

@blob: if you're so good why don't you help me by telling me what I did wrong instead of insulting me?

---

He wasn't insulting you, he was just making a point.

Also use this instead of !$_POST:

PHP Code:

---

empty( $_POST[ 'name' ] ) === false 


---

also get rid of that enctype there is no need for it

PHP Code:

---

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

---

Try that. Does it refresh now. And what do you mean the page refreshes? Like when you load it it refreshes? Or what...?

Quote:

---

Originally Posted by Decoma

PHP Code:

---

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

---

Try that. Does it refresh now. And what do you mean the page refreshes? Like when you load it it refreshes? Or what...?

---

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

I have been trying to figure this out but I can't...

Why on earth does pressing the Submit button just clear the boxes/refresh the page? Could it be that I messed up the action="" value?

Quote:

---

Originally Posted by Fazon

I have been trying to figure this out but I can't...

Why on earth does pressing the Submit button just clear the boxes/refresh the page? Could it be that I messed up the action="" value?

---

You do have method="post" in the <form> tag don't you?

No, I thought you didn't need it if it's on the same page. I've also tried echo '<form action="'.$HTTP_SERVER_VARS['PHP_SELF'].'"; and so on but same problem.

Quote:

---

Originally Posted by Fazon

No, I thought you didn't need it if it's on the same page. I've also tried echo '<form action="'.$HTTP_SERVER_VARS['PHP_SELF'].'"; and so on but same problem.

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

Quote:

---

Originally Posted by Jewish Bear

That is useless, horrible code.

Fine I will do it for you.

PHP Code:

---

<?php
if( empty( $_POST[ 'name' ] ) === false ) {
    echo 'Hi, ' . $_POST[ 'name' ];
} else {
    echo <<<HTML
<form action="" method="post">
Name: <input type="text" name="name" /> <br />
<input type="submit" value="Submit" name="submit" />
</form>
HTML;
}
?>

---

---

internet

Quote:

---

Originally Posted by Jewish Bear

internet

---

this guy is an idiot seriously.

Quote:

---

Originally Posted by Blinger

this guy is an idiot seriously.

---

are we talking about me or him here, cause i can't even tell

talking about fagzone.

Quote:

---

Originally Posted by Fazon

No, I thought you didn't need it if it's on the same page. I've also tried echo '<form action="'.$HTTP_SERVER_VARS['PHP_SELF'].'"; and so on but same problem.

---

What? Of course you need the method attribute o_o.