PHP is a general-purpose scripting language that is especially suited for Web development. The online manual is an excellent resource for the language syntax and has an extensive list of the built-in and extension functions. Most extensions can be found in PECL.

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57
votes
10answers
45k views

memcache vs memcached?

I want to use memcached http://www.danga.com/memcached/ I have installed it through yum install memcached But now I need to connect to PHP, and there is an extension named memcache and one named ...
45
votes
7answers
89k views

How do you restart php-fpm?

I need to reload my php.ini and there's nothing in the help dialog about restarting it.
37
votes
3answers
67k views

how do I upgrade from php 5.3 to php 5.4.6 in ubuntu?

Is there an easy way out to get the latest PHP? I have tried updating my package but none of it has 5.4.6 yet.. if anyone knows on how to do it quickly, can it be shared here? I've tried compiling ...
36
votes
4answers
48k views

Setup ubuntu server to send mail()

I tried searching a lot but unable to find how to actually setup a ubuntu server, so that I can send mails through php using mail() function in php. I have apache2, mysql and php5 installed on my ...
35
votes
11answers
2k views

Got Hacked. Want to understand how

Someone has, for the second time, appended a chunk of javascript to a site I help run. This javascript hijacks Google adsense, inserting their own account number, and sticking ads all over. The ...
33
votes
7answers
69k views

Why is the response on localhost so slow?

I am working on a tiny little PHP project for a friend of mine, and I have a WAMP environment setup for local development. I remember the days when the response from my local Apache 2.2 was immediate. ...
31
votes
5answers
24k views

Which PHP (opcode) cache one should use and why?

I keep hearing about some PHP (opcode) caches like - APC, XCache, Memcache, eAccelerator, etc. But I couldn't ever figure out how to go about choosing one. Apart from performance benefit, which a ...
29
votes
8answers
3k views

Securing PHP webservers

PHP applications have a reputation for higher than average security problems. What configuration techniques do you use for making sure the application is secure as possible? I'm looking for ideas ...
27
votes
4answers
4k views

Why Swap is used when plenty of free memory is left?

I have pretty good web (dedicated) server with good memory resource System information Server load 2.19 (8 CPUs) Memory Used 29.53% (4,804,144 of 16,267,652) Swap Used 10.52% ...
22
votes
5answers
23k views

Can a pool of memcache daemons be used to share sessions more efficiently?

We are moving from a 1 webserver setup to a two webserver setup and I need to start sharing PHP sessions between the two load balanced machines. We already have memcached installed (and started) and ...
22
votes
5answers
32k views

Where is apc.php?

Using Ubuntu server 10.4, I apt-getted php-apc Where is the apc.php file that I'm meant to copy? Thanks!
22
votes
3answers
7k views

PHP: What are the advantages of FastCGI over mod_php?

It was recently suggested to me that I use FastCGI with PHP. Now I went to the FastCGI page and read it but I don't really understand what the advantages are.
21
votes
16answers
1k views

Why is it bad to have a weak mysql user password?

I was presented with an argument to the tune of "you don't need a strong mysql user password because in order to use it, they'd already have access to your server." We're talking about a 4 digit ...
20
votes
3answers
36k views

How do I upgrade to the latest PHP version in CentOS with yum?

I found some blog posts about this, but it's rather lack of descriptions on possible side effects. I could really use some detailed on these steps: How to add a repo that provides PHP 5.4 into yum ...
20
votes
4answers
8k views

What's a secure alternative to using a MySQL password on the command line?

We have a PHP command-line script to version a database. We run this script whenever a developer has added a new database patch. The script runs the patch with the MySQL command-line: system('mysql ...
19
votes
2answers
5k views

How do you Install PHP5 without installing Apache in ubuntu?

Is it possible to install PHP5 without installing apache, in Ubuntu? If so, how?
18
votes
1answer
82k views

Can't start php-cgi.exe - MSVCR110.dll is missing [closed]

Trying to setup nginx and php on my Windows machine, but every time I try to start php-cgi.exe I get a system error. The program can't start because MSVCR110.dll is missing from your computer. ...
17
votes
4answers
32k views

how to restart/clear memcache without restarting the whole web server?

/opt/eduserver/eduserver gives me options: Usage: /opt/eduserver/eduserver ...
17
votes
5answers
11k views

php mail() function painfully slow on local development machine

Background: If you have set up a local apache server for development purposes you may have run into the problem where sendmail takes a long time (at least one minute) to send emails. This is extremely ...
17
votes
9answers
18k views

Mysteriously empty $_POST array

I have the following HTML/PHP page: <?php if(empty($_SERVER['CONTENT_TYPE'])) { $type = "application/x-www-form-urlencoded"; $_SERVER['CONTENT_TYPE'] = $type; } echo "<pre>"; ...
16
votes
3answers
3k views

Why not use a WAMP stack?

I recently had a talk with some experienced people and they suggested to me not to use a WAMP stack, and instead install apache, mysql and php separately. I don't understand why they have suggested ...
16
votes
4answers
12k views

Failed to instal APC via pecl install APC

Hy when i try to install APC via pecl install APC-3.1.5 or even pecl install APC I get following error when the package comes to the make command: running: make /bin/sh ...
16
votes
2answers
7k views

Apache file negotiation failed

I'm having the following issue on a host using Apache 2.2.22 + PHP 5.4.0 I need to provide the file /home/server1/htdocs/admin/contents.php when a user makes the request: ...
16
votes
1answer
587 views

Install APC RedHat

i am trying to install apc on redhat so i did: pecl install apc i said yes to: Use apxs to set compile flags (if using APC with Apache)? [yes]: and i get this: checking for re2c... no ...
16
votes
4answers
14k views

How can I determine the cause of an apparent memory leak in my Apache/PHP based web app?

About once a week, but sometimes even a couple of times a day after running fine for days, my EC2 instances become unresponsive. Munin's memory graphs tell a pretty straightforward story: memory ...
15
votes
4answers
28k views

Connecting to MySQL from PHP is extremely slow

I just did a fresh install of XAMPP. When first opening PHPMyAdmin I noticed it was extremely slow. It didn't make sense that on localhost it should take almost 5 seconds for every page to open. I ...
15
votes
8answers
19k views

MySQL cannot connect via “localhost”, only 127.0.0.1

this is somewhat of a mystery to me. The only way I can connect to MySQL is if I call it via "127.0.0.1" ... for example, my PHP connect script will NOT work with localhost I'm running Mac OS X Lion, ...
15
votes
1answer
10k views

Memory Usage Numbers In top/htop

Can someone please explain this top output. Each PHP process is using 30% of the total memory or of the used memory? Furthermore how can it be that the combined used memory across all the PHP ...
14
votes
2answers
36k views

How can I display and log PHP errors on IIS7?

We're running PHP 5.2.5 on an IIS 7 Server and we're having problems making PHP errors visible... At the moment whenever we have a PHP error the server sends back a 500 error with the message "The ...
13
votes
10answers
8k views

How to scale php5+MySQL above 200 requests/second?

I am tweaking my homepage for performance, currently it handles about 200 requests/second on 3.14.by which eats 6 SQL queries, and 20 req/second on 3.14.by/forum which is phpBB forum. Strangely ...
13
votes
2answers
3k views

Why does Debian clean php sessions with a cron job instead of using php's built-in garbage collector?

Debian and derivatives (Ubuntu) don't use the php session garbage collector session.gc_probability = 0 instead they use a cron /etc/cron.d/php5 09,39 * * * * root [ -x /usr/lib/php5/maxlifetime ] ...
13
votes
1answer
6k views

Multiple php versions simultaneously on Ubuntu

I want to be able to run multiple php versions on my development box running Ubuntu 12.04. What I want to accomplish is that when I use localhost as domain a default is used (let's say php 5.3.17). ...
12
votes
8answers
2k views

is this a hack attempt?

Looking through my 404 logs I noticed the following two URLs, both of which occurred once: /library.php=../../../../../../../../../../../../../../../../../../../../../../../../proc/self/environ and ...
12
votes
3answers
35k views

How can I upgrade PHP to a higher version for Debian Squeeze?

Currently, my PHP is on 5.3.3, how can I upgrade it? Also how can I upgrade anything? For example, if I want to upgrade phpMyAdmin as well?
12
votes
4answers
5k views

Ubuntu's garbage collection cron job for PHP sessions takes 25 minutes to run, why?

Ubuntu has a cron job set up which looks for and deletes old PHP sessions: # Look for and purge old sessions every 30 minutes 09,39 * * * * root [ -x /usr/lib/php5/maxlifetime ] \ ...
12
votes
5answers
15k views

How do I tell Apache which PHP to use?

I am running Apache2 on a Mac OS X (10.5). I just compiled PHP 5.2.8 and finally got pdo-mysql working (or so I think). My command line "php --version" is showing 5.2.8 and I have the right modules ...
12
votes
3answers
16k views

How to investigate a memory leak with Apache and PHP?

We're running a heavy Drupal website that performs financial modeling. We seem to be running into some sort of memory leak given the fact that overtime the memory used by apache grows while the number ...
12
votes
5answers
16k views

Why are my PHP files downloading instead of processing with Nginx

I have seen the same problem, and many resolutions for it pointing to adding the type handler, but that was for Apache. I am using Arch Linux, Nginx, PHP and PHP-FMP and I cannot figure out why php ...
12
votes
2answers
823 views

improve our deployment strategy

We have an ecommerce app that we develop at our company. Its a reasonably standard LAMP application that we have been developing on and off for about 3 years. We develop the application on a testing ...
11
votes
3answers
52k views

How to check my PHP and MySQL version on Ubuntu VPS?

HI I am going to install MyBB but I am not sure whether I have installed the correct version of PHP and MySQL. PHP version 5.1.0 or above with XML Extension installed MySQL version 4.0 or ...
11
votes
1answer
30k views

What is the name and location of the Nginx config file (htaccess equivalent)?

There are many tutorials on how to write Nginx rewrite rules to mimic Apache's .htaccess file but I can't confidently say I know what the name or location of this so-called Nginx config file actually ...
11
votes
2answers
4k views

Should I impersonate PHP via FastCGI?

I am installing the latest version of PHP onto IIS 7.5 via FastCGI, and all of the instructions say that FastCGI should impersonate the calling client by setting fastcgi.impersonate = 1 If my ...
11
votes
3answers
1k views

The A to Z of setting up a Linux box for secure local hosting

I am in the process of reinstalling the OS on a machine that will be used to host a couple of applications for our business. The applications will be local only; access from external clients will be ...
10
votes
5answers
1k views

Safe to have /.svn/ folders on live site? (How to remove them but retain svn update capability?)

I'm doing svn update to update the code for my php website, but it leaves .svn/ folders all over. I think its dangerous to leave those files publically readable, but its very easy to update the ...
10
votes
7answers
674 views

Making the move to source control

Ours is a fairly small company (3-4 programmers and 3-4 site designers) that develops a single-purpose PHP web app which provides the functionality to about 100+ websites. We've operated for a couple ...
10
votes
5answers
51k views

How to install mcrypt for PHP 5.3.3 on CentOS 5.7 64 bit?

I installed php 5.3 and some modules using yum install php53-{module-name} But mcrypt did not work. I searched like this: yum list php* | grep mcry The only package that came up was ...
10
votes
3answers
3k views

Secure LAMP server for production use

What is the procedure for securing a Linux, Apache, MySQL, PHP Server (or even Perl) for production use? Other than setting the MySQL password and the root password for Linux what other (maybe not so ...
10
votes
2answers
23k views

PHP exit status 255: what does it mean?

I recently compiled a php 5.2.9 binary, and I tried to execute some php scripts with it. I can execute some scripts without problems, but one of them halts its execution midway, exiting with no errors ...
10
votes
4answers
588 views

Common PHP setup insecurity?

I work with the systems administration at a university and just stumbled across something which is probably common, but was quite a shock to me. All public_html directories and web areas are stored ...
10
votes
1answer
3k views

apache on centos 5.6 gives me permissions denied error

I'm running apache on centos 5.6 and whenever i try to load a php script in any directory, other than /var/www/html (the apache default root dir) it gives me a permissions denied error. However when ...