CODEWITHSUNDEEP
phpfunctionvariables
Daniel
Daniel

Reputation: 578

access variables outside function

if i have a function like that:

function ($form, $db) {  
     $v = count($a);
}

function ($form, $db);

and this code in the same file

<script type="text/javascript">
$(document).ready(function() {
    for ($i=0; $i< <?php echo $v-1; ?>; $i++) {//here
}

how can i access the variable $v ? i already know that global variables are generally a bad practice, so what is the alternative?

thanks

Upvotes: 0

Views: 2100

Answers (6)

Michael Sazonov
Michael Sazonov

Reputation: 1533

Use return $v:

function ($form, $db) {  
     $v = count($a);
     return $v;
}

<script type="text/javascript">
$(document).ready(function() {
    for ($i=0; $i< <?php echo function( $form , $db )-1; ?>; $i++) {//here
}

Upvotes: 2

Dan Bizdadea
Dan Bizdadea

Reputation: 1302

Use a class to declare your global variables, so it can give them a context

Example :

class Config {
    public static $v;
}

then you can use Config::$v = count(a);

This can be useful if you have more global variables like some configuration parameters that are related to each other and you need to read and write them throughout the application.

If it's not a case and this is just a singular case, than you should consider using the return value.

Upvotes: 0

sproweb
sproweb

Reputation: 26

use the function itself, give it a name and use the returned value liks this

function counter($form, $db) {  
 $v = count($a);
 return $v;
}

and on the script file call the function this way

<script type="text/javascript">
$(document).ready(function() {
  for ($i=0; $i< <?php echo ($this->counter())-1; ?>; $i++) {//here
}

i hope it helps

Upvotes: 0

imkingdavid
imkingdavid

Reputation: 1389

Use return on your function to set the value of $v in the global scope. Then the variable will be accessible outside of the function.

<?php
function ttt($form, $db)
{
    return count($db);
}
$v = ttt($form, $db);

Now $v is accessible via the global scope.

Also, note that javascript variables do not use the $ prefix, so $i would need to be just i... unless I'm missing something there.

Upvotes: 1

genesis
genesis

Reputation: 50976

What about basic return ?

function name($form, $db) {  
     $v = count($a);
     return $v;
}

$v = name($form, $db);

Upvotes: 0

Boann
Boann

Reputation: 50041

Use a global variable; just give it a more descriptive name than $v so there's no danger of it clashing with something else.

Upvotes: 0

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