how to add a javascript alert with a PHP script?

Question

let's say i have an input form, wherein, it's use for an email address. this form is part of a long form so i use an alert box instead when other inputs got errors....my question now is, if I checked the email input string via php, if it has been taken , how will I put the message like e.g "this email has been taken" in an alert box if i am using PHP to check it from backend ?..i want an alert box, since I use it with the other input boxes that don't need a backend check e.g

alert("$errormessage");

try <script type="text/javascript">alert('<?php echo $errorMessage ?>')</script> Where echo $errorMessage is your dynamic php errormessage — Karthik
– Karthik, Commented Jul 29, 2011 at 10:13

genesis · Accepted Answer · 2011-07-29 10:01:20Z

5

PHP is server-side language. you can output it to user with

echo "<script>alert('".mysql_real_escape_string($errormessage)."');</script>";

or you can write your own function

function alert($a){
    echo "<script>alert('".mysql_real_escape_string($a)."');</script>";

}

alert("test");

answered Jul 29, 2011 at 10:01

genesis

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1 Comment

genesis Over a year ago

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Pehmolelu · Accepted Answer · 2011-07-29 10:07:03Z

2

You can echo any kind of javascript with PHP. The question is however, are you sure you want to do this? You can also do like this:

<?php if(emailExists): ?>
<script>alert('Email exists!')</script>
<?php endif; ?>

But you could also use jQuery and Ajax requests to check if email exists with ajax when user has typed the email.

answered Jul 29, 2011 at 10:07

Pehmolelu

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1 Comment

sasori Over a year ago

the problem with ajax in jquery,is, i dunno how to use it...i hafta to learn it over the weekend, as of now,i just wanted to make the form work with an alert box :(

Paula George · Accepted Answer · 2018-05-04 21:00:47Z

0

echo '<script>alert("ssss");</script>' ; just put it within echo it will work that way

answered May 4, 2018 at 21:00

Paula George

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