[SOLVED] How to check if a text box is empty or has a value entered

[Darkmatter5]

How would one check if a text box is empty or has a value entered?

[pocobueno1388]

<?php

$textarea = trim($_POST['field_name']);

if ($textarea == ""){
   //textbox was empty
} else {
   //textbox has a value
}

[ILYAS415]

To check if a text box is empty...

 

if ($_POST['textboxname'] == NULL){ //if nothing is entered or only a zero is entered
echo "error missing field you noob";
}else{
//rest of code
}

 

and to check if a text box has something inside it...

 

if (strip_tags($_POST['textboxname'])){ //if textboxname has a value entered
//code
}

[sasa]

or

<?php
$a = ' ';
if (preg_match('/\S+/',$a)) echo 'not empty'; else echo 'empty';
?>

[ILYAS415]

I hate regex