Source of: /manual/en/internals2.funcs.php
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<div>
<h1>Writing functions</h1>
<p class="para">
PHP is also known as a Glue language, and extending it, can be easily done
with those extensions generators. When you use ext_skel and a prototype file
to generate the C function stubs, you will notice that all of the exported
functions created have a simple prototype such as the following:
PHP_FUNCTION(func_name)
</p>
</div>
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