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例 38-1calling user functions.
?php dl( "call_userland.so"); function test_function() {print("we are in the test function! br "); return("hello");} $return_value = call_userland("test_function"); print("return value: \"$return_value\ "br ");?

表 32-1argument conversion functions
longs and doubles are converted to their corresponding string representation.

表 31-2macros for defining functions
doesn' t require a corresponding c function; refers to the alias target instead.

表 31-3macros to declare startup and shutdown functions
the generated name will be zend_info_ module (for example, zend_info_first_module).

note: all conversion functions expect a **zval as parameter.
strings containing a number are converted to their corresponding numeric representation, otherwise resulting in 0.0.

表 31-1zend's parameters to functions called from php
0 indicates that the return value is not used; 1 indicates that the caller expects a return value.

functions/info.c 中の _php3_info() 関数の 設定セクションに、新しい命令を追加する必要があります。
in either php3take1handler() or php3flaghandler() add the appropriate entry for your directive.

c declaration of exported functions (required to declare the zend function block)
declaration of the zend module block

the functionality part implements the functionality of the language (its functions, etc.).
to implement a web script interpreter, you need three parts:

following is a quote from the sample module discussed previously, which makes use of the conversion functions:
zval **parameter; if((zend_num_args() != 1) _bar_ _bar_ (zend_get_parameters_ex(1, parameter) != success)) {wrong_param_count;} convert_to_long_ex(parameter); return_long(z_lval_p(parameter));

returns a directory entry resource for later use with the zip_entry_...() functions.
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an associative array containing session variables available to the current script. see the session functions documentation for more information on how this is used.
an associative array containing session variables available to the current script.

calls to fbsql_result() should not be mixed with calls to other functions that deal with the result set.
calls to fbsql_result() should not be mixed with calls to other functions that deal with the result set.

if php is used in safe mode, system() and the other functions executing system programs refuse to start programs that are not in this directory.
setting certain environment variables may be a potential security breach.

the following directory and file functions should be used in zend modules. they behave exactly like their c counterparts, but provide virtual working directory support on the thread level.
they behave exactly like their c counterparts, but provide virtual working directory support on the thread level.

openssl_get_privatekey() parses key and prepares it for use by other functions. key can be one of the following:
openssl_get_privatekey() parses key and prepares it for use by other functions. key can be one of the following:

declaration and implementation of these functions can be done with macros; see the earlier section "declaration of the zend module block" for details.
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openssl_get_publickey() extracts the public key from certificate and prepares it for use by other functions. certificate can be one of the following:
an x.509 certificate resource

to work around this, you have to use a set of api functions to force a type conversion on every argument that's being passed (see 表32-1).
arrays and objects are converted based on the number of entries or properties, respectively, that they have.

some psychologists have examined how certain aspects of music — mode, tempo, rhythm, timbre — relate to the emotions listeners feel. studies have found that certain forms of song serve nearly universal functions: across countries and cultures, for instance, lullabies tend to share similar acoustic features that imbue infants and adults alike with a sense of safety.
some psychologists have examined how certain aspects of music — mode, tempo, rhythm, timbre — relate to the emotions listeners feel. studies have found that certain forms of song serve nearly universal functions: across countries and cultures, for instance, lullabies tend to share similar acoustic features that imbue infants and adults alike with a sense of safety.e, lullabies tend to share similar acoustic features that imbue infants and adults alike with a sense of safety.