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POHow to make ZEND_BEGIN_ARG_INFO_EX control number of arguments, passed to a PHP extension?
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  1. POHow to make ZEND_BEGIN_ARG_INFO_EX control number of arguments, passed to a PHP extension?
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    copied!<p>I'm developing a PHP extension, using C. So far I'm working on the proper validation of arguments, passed to the extension's function from PHP userspace. </p> <p>The macro <code>ZEND_BEGIN_ARG_INFO_EX</code> can be used to provide Zend Engine with information about the function's arguments. The 4th parameter of the macro, named as <code>required_num_args</code>, let the engine automatically control the number of arguments, removing this hassle from me. However, I couldn't find the way to make it work: the engine always runs the extension's function without any warnings, even if a PHP script doesn't pass there enough arguments.</p> <p>Here is my definition of function arguments:</p> <pre><code>ZEND_BEGIN_ARG_INFO_EX(test_func_swt_arginfo, 0, 0, 3) ZEND_ARG_INFO(1, firstArg) ZEND_ARG_ARRAY_INFO(0, secondArg, true) ZEND_ARG_OBJ_INFO(1, thirdArg, SomeClass, false) ZEND_END_ARG_INFO() </code></pre> <p>Here is my definition of the functions, exported by the PHP extension:</p> <pre><code>static const zend_function_entry test_func_functions[] = { PHP_FE(sample_with_types, test_func_swt_arginfo) PHP_FE_END }; </code></pre> <p>Here is my function:</p> <pre><code>PHP_FUNCTION(sample_with_types) { RETURN_TRUE; } </code></pre> <p>Here is the PHP script I run:</p> <pre><code>&lt;?php sample_with_types(); </code></pre> <p>Expected result: PHP shows error/warning/exception, something like <em>"not enough arguments are passed to the function"</em>; the function doesn't execute.</p> <p>Actual result: the function executes and returns <code>true</code>.</p> <p>How can I properly configure the function arguments structure, so that Zend Engine check the number of arguments automatically? Or do I mistake the purpose of <code>required_num_args</code> argument in <code>ZEND_BEGIN_ARG_INFO_EX</code> macro?</p>
 

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