d4em0n / hello-php-extension

Learning how to write a PHP extension

Compile

phpize
./configure --enable-hello
make

Tutorial 1

http://devzone.zend.com/303/extension-writing-part-i-introduction-to-php-and-zend/

Run

php -c php.ini -r "echo hello_world();"
Hello World

php -c php.ini -r "var_dump( hello_bool() );"
bool(true)

php -c php.ini -r "echo hello_long();"
42

php -c php.ini -r "echo hello_double();"
3.1415926535

php -c php.ini -r "var_dump( hello_null() );"
NULL

Tutorial 2

http://devzone.zend.com/317/extension-writing-part-ii-parameters-arrays-and-zvals/ http://devzone.zend.com/318/extension-writing-part-ii-parameters-arrays-and-zvals-continued/

php -c php.ini -r "hello_greetme('Joe');"
Hello Joe

php -c php.ini -r "echo hello_add(2, 4.1);"
6.1

php -c php.ini -r "echo hello_add(2, 4.1, true);"
6

php -c php.ini -r "var_dump(hello_array());"

array(6) {
  [42]=>
  int(123)
  [43]=>
  string(33) "I should now be found at index 43"
  [44]=>
  string(10) "I'm at 44!"
  [45]=>
  string(10) "Forty Five"
  ["pi"]=>
  float(3.1415926535)
  ["subarray"]=>
  array(1) {
    [0]=>
    string(5) "hello"
  }
}

Show hello_array_strings:

<?php
$a = array('foo', 123);
var_dump($a);
hello_array_strings($a);
var_dump($a);

Working with $GLOBALS:

<?php
$GLOBALS['test'] = 'Joe';
echo hello_get_global_var('test');
echo hello_get_global_var('none');

Setting local variables:

<?php
hello_set_local_var('test', 'Greetings');
echo "$test\n";

Tutorial 3

http://devzone.zend.com/446/extension-writing-part-iii-resources/

Resources

<?php

$person = hello_person_new("Joseph", 31);
var_dump($person);

hello_person_greet($person);