需求

This extension requires the c-client library to be installed. Grab the latest version from » https://www.washington.edu/imap/ 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.

Note:

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.

User Contributed Notes

jameslandrok at gmail dot com 28-Jan-2015 02:32
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
crabb1d at gmail dot com 10-Sep-2013 12:02
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.
Anonymous 20-Jul-2013 07:04
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
Anonymous 04-Oct-2011 07:58
When compiling IMAP on a 64 bit machine, use: make EXTRACFLAGS=-fPIC.
ldi at email dot cz 04-Aug-2010 07:09
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
Nick 02-Jul-2010 07:06
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 `libphp5.la'

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

See:
http://bugs.php.net/bug.php?id=35465

Also, if you compiled OpenSSL from source, you'll need to do the same, as you'll get error messages for libc-client.a
eelco at care dot nl 17-Mar-2010 11:12
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.