Warning: sizeof(): Parameter must be an array or an object that implements Countable

[Ana22]

Hello friends, I have the following problem, when I see the articles that I have saved as favorites I see the following message:

Warning: sizeof(): Parameter must be an array or an object that implements Countable in /var/www/ blockwishlist/managewishlist.php on line 102

If I can see the products but that message appears, I hope you can help me, thank you.

 

Edited September 7, 2020 by Ana22 (see edit history)

[Daresh]

Your PHP version may be too high for your prestashop version.

[Ana22]

 

Hi @Daresh I am using PHP 7.2 and prestashop 1.7.6.5 do you think it is the php problem?

[Daresh]

Or maybe the blockwishlist module is not up to date with that PHP version.

[nawres]

Same error  with prestashop 1.7.8.2 and php version 7.3 have you found solution please ? 

Edited February 3, 2022 by nawres (see edit history)

[Luis C]

On 9/7/2020 at 7:56 PM, Ana22 said:

Hello friends, I have the following problem, when I see the articles that I have saved as favorites I see the following message:

Warning: sizeof(): Parameter must be an array or an object that implements Countable in /var/www/ blockwishlist/managewishlist.php on line 102

If I can see the products but that message appears, I hope you can help me, thank you.

 

Starting PHP 7.2, sizeof() ( or count() ) can only count arrays or countable objects, not being able to count, for example, strings, true or false booleans, empty or null variables. Please check line 102 and below in your managewishlist.php file and trace the object or variable it's trying to reach. If it's not a countable element it will return an error. You could either rollback your server's PHP version, or adapt the code.

[janoo]

On 9/7/2020 at 7:56 PM, Ana22 said:

Hello friends, I have the following problem, when I see the articles that I have saved as favorites I see the following message:

Warning: sizeof(): Parameter must be an array or an object that implements Countable in /var/www/ blockwishlist/managewishlist.php on line 102

If I can see the products but that message appears, I hope you can help me, thank you.

I hope PS authors already fixed this long time ago.

But for those who experiencing similar error message..

SOLUTION 1:

on: https://github.com/PrestaShop/PrestaShop/pull/9358/files
is solution how to adapt old code for new PHP on many pages, just you have to understand principle (do not copy/paste automatically!):

OLD CODE:

if (isset($this->_list['addons']) && count($this->_list['addons'])) {

NEW CODE:

if ($this->isCountableAndNotEmpty($this->_list, 'addons')) {

Plus add new function into same file, or implement generally through override something:

/**
* Check if key is present in array, is countable and has data.
*
* @param array $array Array
* @param string $key Key
*
* @return boolean
*/
protected function isCountableAndNotEmpty(array $array, $key)
{
return isset($array[$key]) &&
(
$array[$key] instanceof Countable ||
is_array($array[$key])
) &&
count($array[$key]);
}

 

SOLUTION 2:

I´ve found couple handy shorter solutions like:
 

if (is_array($children) && sizeof($children) <= 0) {

or:

if ( (is_array($children) || $children instanceof \Countable) && sizeof($children) > 0) {

but still pay atention - you have to understand principle (do not copy/paste automatically!)

Edited August 22, 2022 by janoo
new ideas (see edit history)