Re-creating CLI by Wrapping Embed

Now that PHP is accessible from your application, it's time to make it do something. The remainder of this chapter centers around re-creating portions of the CLI SAPI's behavior within the framework of this test application.

Easily, the most basic functionality of the CLI binary is the ability to name a script on the command line and have it interpreted by PHP. Implement that in your application by replacing embed1.c with the code in Listing 19.3.

Listing 19.3. embed1.c


int main(int argc, char *argv[])
 zend_file_handle script;

 /* Basic parameter checking */
 if (argc <= 1) {
 fprintf(stderr, "Usage: embed1 filename.php 
 return -1;

 /* Set up a File Handle structure */
 script.type = ZEND_HANDLE_FP;
 script.filename = argv[1];
 script.opened_path = NULL;
 script.free_filename = 0;
 if (!(script.handle.fp = fopen(script.filename, "rb"))) {
 fprintf(stderr, "Unable to open: %s
", argv[1]);
 return -1;

 /* Ignore argv[0] when passing to PHP */

 php_execute_script(&script TSRMLS_CC);

 return 0;

Of course, you'll need a file to test this out with, make a short PHP scriptanything you likein a file called test.php, and then execute it using your embed1 binary:

$ ./embed1 test.php

If you pass additional arguments onto the command line, you'll see that they reach your script in the $_SERVER['argc'] and $_SERVER['argv'] variables.


You might have noticed that the code placed between PHP_EMBED_START_BLOCK() and PHP_EMBED_END_BLOCK() was indented. This is a subtle homage to the fact that these macros form a C block scope. That is, the PHP_EMBED_START_BLOCK() contains an opening curly brace { with a matching closing curly brace } that is hidden within PHP_EMBED_END_BLOCK(). What's important about this is that these macros can't be buried in separate utility startup/shutdown functions. You'll see this problem resolved in the next chapter.

The PHP Life Cycle

Variables from the Inside Out

Memory Management

Setting Up a Build Environment

Your First Extension

Returning Values

Accepting Parameters

Working with Arrays and HashTables

The Resource Data Type

PHP4 Objects

PHP5 Objects

Startup, Shutdown, and a Few Points in Between

INI Settings

Accessing Streams

Implementing Streams

Diverting the Stream

Configuration and Linking

Extension Generators

Setting Up a Host Environment

Advanced Embedding

Appendix A. A Zend API Reference

Appendix B. PHPAPI

Appendix C. Extending and Embedding Cookbook

Appendix D. Additional Resources

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Extending and Embedding PHP
Extending and Embedding PHP
ISBN: 067232704X
EAN: 2147483647
Year: 2007
Pages: 175
Authors: Sara Golemon
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