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Annotation of embedaddon/php/sapi/apache2handler/README, revision 1.1.1.1

1.1       misho       1: WHAT IS THIS?
                      2: 
                      3:     This module exploits the layered I/O support in Apache 2.0.
                      4: 
                      5: HOW DOES IT WORK?
                      6:     
                      7:     In Apache 2.0, you have handlers which generate content (like
                      8:     reading a script from disk). The content goes then through
                      9:     a chain of filters. PHP can be such a filter, so that it processes
                     10:     your script and hands the output to the next filter (which will
                     11:     usually cause a write to the network).
                     12: 
                     13: DOES IT WORK?
                     14: 
                     15:     Currently the issues with the module are:  
                     16:         * Thread safety of external PHP modules
                     17:         * The lack of re-entrancy of PHP. due to this I have disabled the 'virtual' 
                     18:           function, and tried to stop any method where a php script can run another php 
                     19:           script while it is being run.
                     20: 
                     21: 
                     22: HOW TO INSTALL
                     23: 
                     24:     This SAPI module is known to work with Apache 2.0.44.
                     25: 
                     26:         $ cd apache-2.x
                     27:         $ cd src
                     28:         $ ./configure --enable-so
                     29:         $ make install
                     30: 
                     31:     For testing purposes, you might want to use --with-mpm=prefork.
                     32:     (Albeit PHP also works with threaded MPMs. See Thread Safety note above)
                     33: 
                     34:     Configure PHP 4:
                     35: 
                     36:         $ cd php-4.x
                     37:         $ ./configure --with-apxs2=/path/to/apache-2.0/bin/apxs
                     38:         $ make install
                     39:    
                     40:     At the end of conf/httpd.conf, add:
                     41: 
                     42:         AddType application/x-httpd-php .php
                     43: 
                     44:     If you would like to enable source code highlighting functionality add:
                     45:     
                     46:         AddType application/x-httpd-php-source .phps
                     47:     
                     48:     That's it. Now start bin/httpd.
                     49: 
                     50: HOW TO CONFIGURE
                     51: 
                     52:     The Apache 2.0 PHP module supports a new configuration directive that
                     53:     allows an admin to override the php.ini search path. For example,
                     54:     place your php.ini file in Apache's ServerRoot/conf directory and
                     55:     add this to your httpd.conf file:
                     56: 
                     57:         PHPINIDir "conf"
                     58: 
                     59: DEBUGGING APACHE AND PHP
                     60:     
                     61:     To debug Apache, we recommened:
                     62: 
                     63:         1. Use the Prefork MPM (Apache 1.3-like process model) by
                     64:            configuring Apache with '--with-mpm=prefork'.
                     65:         2. Start httpd using -DONE_PROCESS (e.g. (gdb) r -DONE_PROCESS).
                     66: 
                     67:     If you want to debug a part of the PHP startup procedure, set a 
                     68:     breakpoint on 'load_module'. Step through it until apr_dso_load() is 
                     69:     done. Then you can set a breakpoint on any PHP-related symbol.
                     70: 
                     71: TODO
                     72: 
                     73:     PHP functions like apache_sub_req (see php_functions.c)
                     74:     Source Code Highlighting
                     75:     Protocol handlers
                     76: