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Display warning window using php and javascript

if (!(isset($_POST['fullname']) && strlen($_POST['fullname']))) {
  echo 
  "<script type=\"text/javascript\">".
  "window.alert('You must enter your full name.');".
  "</script>"; 

   exit;             
}

The above code is in the file register.php. I have an html form in index.html. when i submit the form without full name. it displays alert, but the page is stuck in register.php(blank page). I want to display the page alerton index.htmlor at least redirect to index.html. how to do it???

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10 answers

Try window.location.href = '/index.htmlinsidescript

if (! (isset($_POST['fullname']) && strlen($_POST['fullname']))) {
    echo "<script type=\"text/javascript\">window.alert('You must enter your full name.');window.location.href = '/index.html';</script>"; 
   exit;
}
+3
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Do it like this:

if (!(isset($_POST['fullname']) && strlen($_POST['fullname']))) {
  echo 
  "<script type=\"text/javascript\">".
  "window.alert('You must enter your full name.');".
  "top.location = 'index.html';".
  "</script>"; 

   exit;             
}
0
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exit , register.php.

: http://www.cyberciti.biz/faq/php-redirect/

0

1 . . . . register.php .

windows.location("index.php").

.

0
<?php
if (!(isset($_POST['fullname']) && strlen($_POST['fullname']))) {
    echo
        "<script type=\"text/javascript\">".
        "window.alert('You must enter your full name.');".
        'window.location.href="index.html";'.
        "</script>";

    exit;
}
0

PHP, . ? :

<form name="contactForm" action="register.php">
    <label for="name" id="name_label">Name</label>  
    <input type="text" name="name" id="name" />  
    <input type="submit" name="submit" class="button" id="submit_btn" value="Send" />
</form>

<script>
    $(function() {  
        $('#contactForm').on('submit', function() {  
            // validate and process form here
            if( !$("#name").val() ) {  
                alert('You must enter a valid name!');
                return false;
            }
        });  
    });
</script>
0

- , , .

:

<form id="myform" action="register.php" method="post">
    Full Name: <input type="text" name="fullname" />
    <input type="submit" value="Submit" />
</form>

<script type="text/javascript">
document.getElementById('myform').onsubmit=function(){
    if(!this.fullname.value) {
        alert("You must enter your full name")
        //stop form submission
        return false
    }
    //continue on to register.php
    return true
}
</script>

JS:

http://jsfiddle.net/GAk8C/

0

, . index.html. html- index.html pge folloimg

<input type="submit" name="submit" value="yourvalue" onclick="return validateName()">

javascript

<script language="javascript" >
function validateName(){
if(document.getElementById("idOfFirstNameField").value==""){
alert("Please enter your name");
document.getElementById("idOfFirstNameField").focus();
return false;   
    }   

    }
</script>
0

, javascript index.html. , , register.php. index.html

HTML,

<head>
function validate(){
     fname=document.getElementByID('fname').value;
     if (fname==""){
         alert("Please provide full name.");
         return false;
     }else{
         window.location.href = 'register.php';
     }
}
</head>
<body>
      <form name="adminform" src="register.php" onsubmit="return validate();">
      <input type="text" id="fname" name="fname" value=""/>
      </form>
</body>

, register.php

0

. register.php:

<?php session_start();

if((empty($_POST['name'])) || (empty($_POST['email'])) || (empty($_POST['subject'])) || (empty($_POST['message']))) {
    $_SESSION['mensaje']="<script language=\"javascript\">alert('All fields are mandatory')</script>";
    header("Location: ../contact.php");
    exit;
  }

, ( contact.php)

<?php session_start();
if(isset($_SESSION['mensaje'])){
  echo $_SESSION['mensaje'];
}
session_destroy();?>
<!DOCTYPE html>

You can also use the same method to display a success message. Hope this helps.

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