Calling javascript fn from php 1

amir4oracle · Jan 31, 2006

The following code has a javascript function commalrt() instead giving the alert it echos: javascript: commalrt() in the window how can i invoke the javascript fn from php

The Code is:

<html>
<head>

<script language="javascript">

function commalrt() {
alert ('You forgot to enter Comment');
}
</script>

</head>

<body>

<?php
.
.
if (empty($_POST['comments']))
echo "javascript: commalrt()";
.
.
?>
.
.
<input type="text" name="comments" size="15" value="<?php echo $_POST['comments']; ?>"/>
.
.
</body>
</html>

.
.
<input type="text" name="comments" size="15" value="<?php echo $_POST['comments']; ?>"/>
.
.
</body>
</html>

NigeW · Jan 31, 2006

wrap <script> tags around the function call rather than just "javascript"

Nigel Wilson
Christchurch Web Design

Vragabond · Jan 31, 2006

What exactly are you trying to achieve? Do you realize that JavaScript runs on the client and PHP on the server. Do you know that all you will do with what you have that as soon as the new page loads, user will get an anoying alert box. You could just print out in red letters the fields the user forgot to enter.

amir4oracle · Feb 1, 2006

NigeW I coded the function call like thisas you said, still it gives error:

if (empty($_POST['addi_info'])) echo "<script language="javascript"> alrt();</script>";

can you tell me what is the exact syntax, thanks

Vragabond: I use red text messages if there is a big form validation required. Saying this this and this are missing or not appropriately entered. Thanks for the concern though.

jpadie · Feb 1, 2006

you just echo or print what you want in the html (remembering to escape any nested quotation marks...)

Code:

if (empty($_POST['addi_info'])) :
echo "<script type=\"text/javascript\">alrt();</script>";
endif;
[\code]

amir4oracle · Feb 1, 2006

I did it simply like this and it worked
echo "<script> alrt();</script>";

thanks

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Calling javascript fn from php 1

amir4oracle

Programmer

NigeW

Programmer

Vragabond

Programmer

amir4oracle

Programmer

jpadie

Technical User

amir4oracle

Programmer

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