PHP 8.0.26 Released!


This extension requires the c-client library to be installed. Grab the latest version from » and compile it.

It's important that you do not copy the IMAP source files directly into the system include directory as there may be conflicts. Instead, create a new directory inside the system include directory, such as /usr/local/imap-2000b/ (location and name depend on your setup and IMAP version), and inside this new directory create additional directories named lib/ and include/. From the c-client directory from your IMAP source tree, copy all the *.h files into include/ and all the *.c files into lib/. Additionally when you compiled IMAP, a file named c-client.a was created. Also put this in the lib/ directory but rename it as libc-client.a.


To build the c-client library with SSL or/and Kerberos support read the docs supplied with the package.

Note: In Mandrake Linux, the IMAP library (libc-client.a) is compiled without Kerberos support. A separate version with SSL (client-PHP4.a) is installed. The library must be recompiled in order to add Kerberos support.

add a note

User Contributed Notes 9 notes

crabb1d at gmail dot com
9 years ago
For those using Ubuntu and who are completely daunted by compiling this, it's easy under Ubuntu:

Install libc-client-dev
# sudo apt-get install libc-client-dev

Install PHP5 imap:
# sudo apt-get install php5-imap

Restart Apache
# sudo service apache2 reload

Should work for most people.
allan at umich dot edu
3 years ago
It should be noted that the source code archives at the University of Washington, and the mirrors, have been dead for some time.

There is a github repository located here:
jameslandrok at gmail dot com
7 years ago
A more secure & easy way to do this on Debian 7.7, php 5.4:

apt-get install php5-imap

Packages installed
  libc-client2007e mlock php5-imap
ldi at email dot cz
12 years ago
After few hours of testing it on CentOS 5 64 bit I'd like to share the steps required to compile imap with php:

1. Install openssl:

   yum install openssl openssl-devel

2. If you don't have openssl compiled and installed in /usr/local/ssl create symlink:

   ln -s /usr/lib64/openssl/engines/ /usr/local/ssl

3. Add the libraries:

   ln -s /usr/include/ /usr/local/ssl/include

4. Compile IMAP

  cd /path/to/imap_src
  make lnp SSLTYPE=unix

5. Copy files as described above
mkdir lib
mkdir include
cp c-client/*.c lib/
cp c-client/*.h include/
cp c-client/c-client.a lib/libc-client.a

6. Compile PHP
  cd /path/to/php/src
  ./configure --with-imap=/path/to/imap_src --with-libdir=lib64
11 years ago
When compiling IMAP on a 64 bit machine, use: make EXTRACFLAGS=-fPIC.
eelco at care dot nl
12 years ago
Spent hours and hours on compiling PHP with IMAP support on CentOS 64-bit but after many trial and error sessions I got if fixed.

If you have set the '--with-libdir=lib64' flag and you encounter the the 'cannot find the c-client library' error while compiling, try to create a symlink 'lib64' to 'lib' in your imap installation dir.

Apparantly, PHP will search only in lib64 directories if the flag is set. This also applies on the IMAP library but documentation lacks on this point.
1 month ago
php-imap package is not available neither in Red Hat Enterprise Linux 7 nor 8.

To compile the extension yourself:

# yum install pam-devel openssl-devel

Follow steps 2 and 3 from the previous post of "ldi at email dot cz"

Download the c-client library from github, you can see the link at the top of the page and compile with:
# make lr5 SSLINCLUDE=/usr/include/openssl/ EXTRACFLAGS=-fPIC
(if you are using another distro, instead of lr5 you will type something else, you can view the Makefile for other unix flavors)

Follow step 5 from the previous post of "ldi at email dot cz" which is what the second paragraph at the top of the page explains.

Download the PHP source code of the version installed in your system and go to the php/ext/imap folder.

# phpize
(If you installed the PHP packages from the Red Hat Software Collections you must run the following command before to set the enviroment eg: scl enable rh-php73 bash)

# ./configure --with-imap=<<path_to_where_you_unpacked_the_c-client_library_and_compiled_it>> --with-imap-ssl

# make

This creates the file php/ext/imap/modules/ :)
Copy it to your extension_dir (you can find it in the phpinfo() page).
Create an .ini file in the php.d folder with the text:

Restart apache and be happy.

P.S. You could probably find the extension compiled out there but who knows the trustiness of the source so better to get the official unaltered sources.
9 years ago
When compiling IMAP 2007f with php 5.3.27 on a 64 bit OL5.7 machine, add in the Makefile: EXTRACFLAGS=-fPIC and EXTRAAUTHENTICATORS=gss
12 years ago
If you run into an error similar to the following when compiling / making PHP:

errno 0x21c /usr/local/imap-2007e/lib/libc-client.a(netmsg.o)
ld: fatal: relocations remain against allocatable but non-writable sections
make: Fatal error: Command failed for target `'

You need to recompile the IMAP library and add -fpic or -fPIC to your CFLAGS.


Also, if you compiled OpenSSL from source, you'll need to do the same, as you'll get error messages for libc-client.a
To Top