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alert for empty input in php

WEB.DEV. VISHNU KUMAWAT answered on April 16, 2022 Popularity 5/10 Helpfulness 4/10

answer alert for empty input in php

alert for empty input in php

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<?php
function formWasPosted()
{
    return array_key_exists( 'comp', $_POST );
}
// -------
function validate( &$errors )
{
    if ( $_POST['comp'] == '' )
    {
        $errors['comp'] = 'cannot be blank';
    }

    return count( $errors ) == 0;
}
// -------
function getError( $fieldName, $errors )
{
    $out = '';

    if ( array_key_exists( $fieldName, $errors ) )
    {
        $out = '<span class="errorMsg">' . $errors[$fieldName] . '</span>';
    }

    return $out;
}
//------------------------------------------------------------------------
// $errors will be passed to our validate function so we can set error messages per field if desired.
$errors = array();
$formMsg = '';

if ( formWasPosted() )
{
    if ( validate( $errors ) )
    {
        // do processing here
        header( 'Location: http://www.example.com/success' );
        exit();
    }
    $formMsg = '<div class="errorNotice">There were problems with your submission</div>';
}
?>
<html><head>
<script type="text/javascript">
    function validate()
    {
        var x=document.forms["Form1"]["comp"].value;
        if (x==null || x=="")
        {
            alert("comp cannot be blank");
            return false;
        }
    }
</script>
<style>
.errorMsg, .errorNotice { color: red; }
.errorNotice { font-size: 150%;}
</style>
</head>
<body>
    <?php echo $formMsg; ?>
    <form name="Form" action="welcome.php" onsubmit="return validate()" method="post">
        <label for="comp">Comp <?php echo getError( 'comp', $errors ); ?></label>
        <input id="comp" type="text" name="comp">
    </form>
</body>
</html>

Popularity 5/10 Helpfulness 4/10 Language php

Source: stackoverflow.com

Tags: alert input php

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Contributed on Apr 16 2022

WEB.DEV. VISHNU KUMAWAT

0 Answers Avg Quality 2/10

alert for empty input in php

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