PHP Form Validation...

[LMS16]

Hey,

Does anyone know of any good methods of PHP form validation?

Basically all I am after is a way for a user to submit a form, if they left out a required field alert them but keep all data they have already entered?

+REP

Lew.

[Dentafrice]

Basic.. but you should get the idea.

<?php
if($_POST) {
    $name = $_POST["name"]; // clean this of course... 

    if($name == "") {
        $error = "Name left blank..";
    } else {
        // wasn't blank..
    }

}
?>

<?php
if($error != "") {
    echo "<h1>ERROR!:</h1> <p>{$error}</p>";
}
?>

<form name="blah" method="post" action="index.php">
    <label>Name:</label>
    <input type="text" value="<?php echo $name; ?>" />
    <input type="submit" />
</form>

[triston220]

<form action="index.php" method="post">
<input type="text" name="Name">
<input type="submit" name="submit" value="Gooo!">
</form>

<?php
if (isset($_POST['submit'])) {  //Has the user pressed the button?
if ($_POST['Name'] =='') {     //Is there a value for name?
Echo "Enter a value";           //Not here.
}else{
echo "validation passed!"; //Yay, the user entered a value which was not null.
}
}
?>

[LMS16]

<form action="index.php" method="post">
<input type="text" name="Name">
<input type="submit" name="submit" value="Gooo!">
</form>

<?php
if (isset($_POST['submit'])) {  //Has the user pressed the button?
if ($_POST['Name'] =='') {     //Is there a value for name?
Echo "Enter a value";           //Not here.
}else{
echo "validation passed!"; //Yay, the user entered a value which was not null.
}
}
?>

I found a solution in the end + the way you've done it, it wont keep the values in text boxes.

Lew.

[Dentafrice]

Not trying to be a party pooper... but read the post next time before you try and offer a solution on what he wanted...