PHP startup warning on amazon aws

[ajoo]

Hi all,

 

I am getting the following warning in the log file 

 

 

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib64/php/5.6/modules/mysqli.so' - /usr/lib64/php/5.6/modules/mysqli.so: undefined symbol: mysqlnd_connect in Unknown on line 0

 

 

and because of this, I think, the library functions are not working. For e.g. if I write code with 

strlen() or mb_strlen()

 lib functions, the code fails to work. 

 

Here is the simple test code which gives an http error 500.:

 

<?php
 $sl = "astha12ah";
 sayname($sl);

 function sayname($n){
        $len= mb_strlen($n, 'UTF-8');
        echo $len;
    //  echo strlen($n);
        echo "<br>";
        echo "<br>";
        echo $n;
        return;
 }

?>

Any help appreciated in resolving this. 

 

Thanks all !

 

 

[requinix]

What OS? Did you build PHP yourself?

[ajoo]

Hi requinix, 

 

The operating system is Amazon Linux. The program uses a bash script, as a hook in the yml, to build PHP, apache, mysql .

 

Here is the script:

sudo yum groupinstall -y "Web Server" "MySQL Database"
sudo yum install php56
#yum list installed | grep php
sudo yum install -y php5.6 php5.6-mcrypt php5.6-mbstring php5.6-curl php5.6-cli php5.6-mysql php5.6-gd php5.6-intl php5.6-xsl php5.6-zip libapache2-mod-php5.6
sudo yum install -y php56-mysqlnd

wget https://tn123.org/mod_xsendfile/mod_xsendfile.c --no-check-certificate
sudo yum install gcc
sudo yum install httpd24-devel.x86_64
sudo apxs -cia mod_xsendfile.c
sudo service httpd restart 

 

 

As you can see, I skipped the PHP as a part of group install and then used the lines below to install the  version 5.6 of PHP

 

Thanks. 

Edited August 30, 2017 by ajoo

[requinix]

sudo yum install -y php56-mysqlnd

Sure it's not "php5.6-mysqlnd"? But even then, having php5.6-mysql (which presumably provides mysqli) depend on mysqlnd implicitly but not explicitly is weird.

[ajoo]

Hi requinix,

 

Yes, the googled page specifically mentioned that it has to be php56-mysqlnd. Maybe you can suggest how may I uninstall the php and reinstall it. Any other suggestions perhaps ?

 

Thanks.

[requinix]

I don't know what you searched for but I do know that

sudo yum install php56
sudo yum install -y php5.6 ...

is weird: you should not have two sets of PHP 5.6 packages available. One or the other. So one of those works and the other doesn't.

 

What php5* packages do you have installed already? What is the proper name of the mysqlnd package?

 

If you don't know how to find out, what are the repo URIs mentioned in /etc/yum/repos.d?

[ajoo]

Hi requinix, 

 

I think the two repos are : a) the default repo of Amazon and b) the ppa:ondrej 

 

There is no repo.d in etc/yum.  

 

 

[ec2-user@ip-172-131-20-181 yum]$ ls -la

total 28

drwxr-xr-x  6 root root 4096 Aug 28 12:13 .

drwxr-xr-x 85 root root 4096 Aug 30 05:41 ..

drwxr-xr-x  2 root root 4096 Aug 10 23:50 fssnap.d

drwxr-xr-x  2 root root 4096 Aug 10 23:50 pluginconf.d

drwxr-xr-x  2 root root 4096 Aug 10 23:50 protected.d

drwxr-xr-x  2 root root 4096 Aug 10 23:50 vars

-rw-r--r--  1 root root  444 Aug 10 23:50 version-groups.conf

 

OK I found the repos here  etc/yum.repos.d :

 

 

drwxr-xr-x  2 root root 4096 Aug 28 12:13 .

drwxr-xr-x 85 root root 4096 Aug 30 05:41 ..

-rw-r--r--  1 root root 1014 Aug 10 23:26 amzn-main.repo

-rw-r--r--  1 root root  327 Aug 10 23:26 amzn-nosrc.repo

-rw-r--r--  1 root root 1041 Aug 10 23:26 amzn-preview.repo

-rw-r--r--  1 root root 1041 Aug 10 23:26 amzn-updates.repo

-rw-r--r--  1 root root  957 Aug 26 12:10 epel.repo

-rw-r--r--  1 root root 1056 Mar  1  2013 epel-testing.repo

-rw-r--r--  1 root root   80 Aug 18 05:58 ondrej_php.repo

[ec2-user@ip-172-31-10-188 yum.repos.d]$

 

 

Edited August 30, 2017 by ajoo

[requinix]

And they say Android is fragmented...

 

ppa:ondrej? The Ubuntu repository? On Amazon Linux, which is based on RHEL? Am I confused or is that totally backwards?

 

What do

yum repolist

yum list installed | grep php

show?

[ajoo]

hmm , I guess that's my fault requinix. I checked installing php5.6 on digital ocean tutorial and then implemented it here changing the apt-get by yum !!    Sorry.

 

 

Loaded plugins: priorities, update-motd, upgrade-helper

Repository 'ondrej_php': Error parsing config: Error parsing "baseurl = 'ppa:ondrej/php'": URL must be http, ftp, file or https not "ppa"

1011 packages excluded due to repository priority protections

repo id                                            repo name                                                                     status

!amzn-main/latest                                  amzn-main-Base                                                                       5,668

!amzn-updates/latest                               amzn-updates-Base                                                                      776

epel/x86_64                                        Extra Packages for Enterprise Linux 6 - x86_64                                11,369+1,011

repolist: 17,813

[ec2-user@ip-172-31-10-188 yum.repos.d]$ yum list installed | grep php

Repository 'ondrej_php': Error parsing config: Error parsing "baseurl = 'ppa:ondrej/php'": URL must be http, ftp, file or https not "ppa"

php56.x86_64                         5.6.31-1.134.amzn1            @amzn-updates

php56-cli.x86_64                     5.6.31-1.134.amzn1            @amzn-updates

php56-common.x86_64                  5.6.31-1.134.amzn1            @amzn-updates

php56-fpm.x86_64                     5.6.31-1.134.amzn1            @amzn-updates

php56-gd.x86_64                      5.6.31-1.134.amzn1            @amzn-updates

php56-jsonc.x86_64                   1.3.6-1.19.amzn1              @amzn-main

php56-mysqlnd.x86_64                 5.6.31-1.134.amzn1            @amzn-updates

php56-pdo.x86_64                     5.6.31-1.134.amzn1            @amzn-updates

php56-process.x86_64                 5.6.31-1.134.amzn1            @amzn-updates

php56-soap.x86_64                    5.6.31-1.134.amzn1            @amzn-updates

php56-xml.x86_64                     5.6.31-1.134.amzn1            @amzn-updates

php56-xmlrpc.x86_64                  5.6.31-1.134.amzn1            @amzn-updates

[

 

But that's been excluded, isn't that what it says?

Thanks !!

[ajoo]

HI requinix ! 

 

What next !? Please guide. 

 

Thanks !

[requinix]

Uninstall whatever's been added with apt. Just stick with yum whenever possible.

 

Then see if you still have a problem at all. You might not.

[ajoo]

hmmm ni I never used apt to install anything. I used only yum but took the procedure from an ubuntu tutorial. Do I need to remove the ppa:ondrej repo / package from my linux so that it may not interfere ? What would be the command for that ?

 

Thanks requinix !

[requinix]

It's probably somewhere in /etc/apt[.d].

 

So you didn't install anything other than with yum?

apt list --installed

is empty?

[ajoo]

Hi requinix, 

 

I uninstalled the php and apache and reinstalled using only yum as suggested by you and that cleared the warning related to the libs in the error_log. Thanks !!

 

However, the original problem still remains !! If I just echo out "Hello World", it displays correctly on my secure site ! But if I try and do a small bit of code as in #1, shown below again for convenience

<?php
 $sl = "astha12ah";
 sayname($sl);

 function sayname($n){
        $len= mb_strlen($n, 'UTF-8');
        echo $len;
    //  echo strlen($n);
        echo "<br>";
        echo "<br>";
        echo $n;
        return;
 }

?> 

it simply gives an HTML 500 error. The error_log has no errors, warnings or notices. 

 

Does changing to a secure (HTTPS) site change the error logs too ? If so, then maybe I am looking up the wrong ones at /var/log/httpd/. Else I am not sure what do do from here to try and debug this.

 

Thanks for any inputs !!

[requinix]

However, the original problem still remains !! If I just echo out "Hello World", it displays correctly on my secure site ! But if I try and do a small bit of code as in #1 [...] it simply gives an HTML 500 error. The error_log has no errors, warnings or notices.

Check the PHP configuration used with Apache. You at least display_errors=off, so set error_log to somewhere appropriate, restart Apache, and try again.

 

But the problem is probably a missing mbstring.

 

Does changing to a secure (HTTPS) site change the error logs too ?

Depends on the configuration. It could. Personally I wouldn't use a separate configuration for the two.

 

If so, then maybe I am looking up the wrong ones at /var/log/httpd/.

You have php-fpm installed, which works differently from a regular Apache module. Now you need to look at its configuration to see what it has. The logs would probably be in /var/log/php-fpm.

[ajoo]

Hi !

 

I found out that there is another log in the same place as the error logs called ssl_error_log and that confirms that indeed the mb_strlen is an undefined function in index.php.

 

So what lib needs to be installed now ? Strangely i was not getting any of these problems earlier and this started when I changed to the secure HTTPS protocol.

 

Thanks !

[ajoo]

Ok I got it, sudo yum install php56-mbstring

 

This installs the right lib. 

 

Thanks !