Can't call PHP function from Javascript [duplicate]

Question

I can't call PHP-function in Javascript. My code:

function clearDatabase(){
$str_sql_query = "TRUNCATE TABLE categories";
if (!$result = mysql_query($str_sql_query, $link))
{
    echo "<br>Bad request<br>";
    exit();
}
echo "All deleted!";
}

echo "<script type=\"text/javascript\">
 function clickClearButton()
 {
     <?php clearDatabase(); ?> //This function don't call
 }
 </script>";

I already tried "<?php clearDatabase(); ?>", \"<?php clearDatabase(); ?>\". clearDatabase();. What i doing wrong? Thank you.

PHP is a server side language and Javascript in a client side one. You can right Javascript in PHP code, but you can't access PHP functions in Javascript. You should really try to learn some more regarding web application development. — Rolando Isidoro
– Rolando Isidoro, Commented Apr 25, 2013 at 21:59
Take a look at this question+answer to understand more of what you need to do. — Chris Forrence
– Chris Forrence, Commented Apr 25, 2013 at 22:02

Iesus Sonesson · Accepted Answer · 2013-04-25 21:59:23Z

1

PHP is run on server side and not Client side like JavaScript, you need to dynamically load the php to do this. (preferably with ajax)

A simple solution would be to put the php code into a new file called X.js then create an empty <script id="loadscript" src="#"> tag then change the src with javascript document.getElementbyId("loadscript").src="x.js"; would run the code

answered Apr 25, 2013 at 21:59

Iesus Sonesson

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Cezary Wojcik · Accepted Answer · 2013-04-25 21:59:12Z

0

You can't do this, it won't work. Put that function in another page and then make an AJAX call to it from JavaScript.

answered Apr 25, 2013 at 21:59

Cezary Wojcik

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