PHP: Call to undefined function: simplexml_load_string()

Question

I am implementing facebook count function using cron file. In which cron runs every 10 minutes and counts the total likes of a page.

for($i=0;$i<3;$i++){
    $source_url =$cars[$i];
    $rest_url = "http://api.facebook.com/restserver.php?method=links.getStats&urls=".urlencode($source_url);
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL,$rest_url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $content = curl_exec($curl);
    curl_close($curl);
    $message=stripslashes($content);
    $xml_record = simplexml_load_string($message);
    $fb_like_count = $xml_record->link_stat->like_count;
    echo "".$fb_like_count;
    mail("[email protected]","hi".$fb_like_count,$message);
}

But I am geting undefined call function error.

Do you have php-xml module installed and enabled?

marian0
– marian0

2015-07-03 11:57:33 +00:00
Commented Jul 3, 2015 at 11:57 — marian0
– marian0, Commented Jul 3, 2015 at 11:57

Benjamin Loison · Accepted Answer · 2023-09-16 18:12:05Z

171

For PHP 7 and Ubuntu 14.04 the procedure is follows. Since PHP 7 is not in the official Ubuntu PPAs you likely installed it through Ondřej Surý's PPA (sudo add-apt-repository ppa:ondrej/php). Go to /etc/php/7.0/fpm and edit php.ini, uncomment to following line:

extension=php_xmlrpc.dll

Then simply install php7.0-xml:

sudo apt-get install php7.0-xml

And restart PHP:

sudo service php7.0-fpm restart

And restart Apache:

sudo service apache2 restart

If you are on a later Ubuntu version where PHP 7 is included, the procedure is most likely the same as well (except adding any 3rd party repository).

edited Sep 16, 2023 at 18:12

Benjamin Loison

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answered Apr 4, 2016 at 15:40

Andreas Bergström

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7 Comments

wmfrancia Over a year ago

Just fyi you don't need to uncomment extension=php_xmlrpc.dll on Ubuntu as that is a windows extension just do the second step and it will work

Sushivam Over a year ago

i followed the same : still i get Call to undefined function simplexml_load_string() in /var/www/html/magento1901/lib/Varien/Simplexml/Config.php on line 510

Coded Container Over a year ago

I had received a unrecognized service error. I just restarted apache2 and this fixed this issue. Thaks for the help find this line in PHP.ini

Linnea Huxford Over a year ago

yep, this worked, and I was able to skip the first step as @wmfrancia stated.

naomi Over a year ago

I just did "sudo apt install php-xml", no need for other steps

|

Benjamin Loison · Accepted Answer · 2023-09-16 18:12:46Z

60

If the XML module is not installed, install it.

Current version 5.6 on ubuntu 14.04:

sudo apt-get install php5.6-xml

And don't forget to run sudo service apache2 restart command after it

Zulhilmi Zainudi

edited Sep 16, 2023 at 18:12

Benjamin Loison

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answered Mar 5, 2016 at 22:39

Fabian Blechschmidt

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2 Comments

naomi Over a year ago

You can just do "sudo apt install php-xml" and it will get the correct version for you.

Zulhilmi Zainudin Over a year ago

And don't forget to run sudo service apache2 restart command after it

Benjamin Loison · Accepted Answer · 2023-09-16 18:13:09Z

13

I also faced this issue. My Operating system is Ubuntu 18.04 and my PHP version is PHP 7.2.

Here's how I solved it:

Install Simplexml on your Ubuntu Server:

sudo apt-get install php7.2-simplexml

Restart Apache Server

sudo systemctl restart apache2

That's all.

I hope this helps

edited Sep 16, 2023 at 18:13

Benjamin Loison

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answered Jan 10, 2020 at 16:27

Promise Preston

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Comments

Björn Pfoster · Accepted Answer · 2017-08-24 12:08:48Z

8

I think it can be something like in this Post: Class 'SimpleXMLElement' not found on puphpet PHP 5.6 So maybe you could install/activate

php-xml or php-simplexml

Do not forget to activate the libraries in the php.ini file. (like the top comment)

edited Aug 24, 2017 at 12:08

answered Jul 26, 2017 at 11:40

Björn Pfoster

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1 Comment

Björn Pfoster Over a year ago

Also try this link

marian0 · Accepted Answer · 2015-07-03 12:03:43Z

7

Make sure that you have php-xml module installed and enabled in php.ini.

You can also change response format to json which is easier to handle. In that case you have to only add &format=json to url query string.

$rest_url = "http://api.facebook.com/restserver.php?method=links.getStats&format=json&urls=".urlencode($source_url);

And then use json_decode() to retrieve data in your script:

$result = json_decode($content, true);
$fb_like_count = $result['like_count'];

answered Jul 3, 2015 at 12:03

marian0

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1 Comment

anil Over a year ago

i have modified my terminal php version then it is working fine

Benjamin Loison · Accepted Answer · 2023-09-16 18:13:30Z

6

For Nginx (without apache) and PHP 7.2, installing php7.2-xml wasn't enough. Had to install php7.2-simplexml package to get it to work

So the commands for debian/ubuntu, update packages and install both packages

apt update
apt install php7.2-xml php7.2-simplexml

And restart both Nginx and php

systemctl restart nginx php7.2-fpm

edited Sep 16, 2023 at 18:13

Benjamin Loison

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answered May 20, 2020 at 14:14

Ajay Singh

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Benjamin Loison · Accepted Answer · 2023-09-16 18:13:58Z

4

To fix this error on Centos 7:

Install PHP extension:
```
sudo yum install php-xml
```
Restart your web server. In my case it's php-fpm:
```
sudo service php-fpm restart
```

edited Sep 16, 2023 at 18:13

Benjamin Loison

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answered Mar 28, 2019 at 14:06

yesnik

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