User Contributed Notes
API Macros |
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nutbar at innocent dot com
03-Jan-2002 10:51 |
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There are also:
Z_TYPE(zval)
Z_TYPE_P(*zval)
Z_TYPE_PP(**zval)
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k at ailis dot de
06-Apr-2002 11:33 |
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These macros can be used to access the boolean value of a zval. Yes, you
can use Z_LVAL* for booleans, too, but these macros also do a type cast to
zend_bool:
Z_BVAL(zval)
Z_BVAL_P(zval)
Z_BVAL_PP(zval)
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k at ailis dot de
06-Apr-2002 11:41 |
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To complete the macro list:
Access an object:
Z_OBJ(zval)
Z_OBJ_P(zval)
Z_OBJ_PP(zval)
Access object property hash
table:
Z_OBJPROP(zval)
Z_OBJPROP_P(zval)
Z_OBJPROP_PP(zval)
Access object class entry:
Z_OBJCE(zval)
Z_OBJCE_P(zval)
Z_OBJCE_PP(zval)
Access a
ressource (which is fairly the same as Z_LVAL*):
Z_RESVAL(zval)
Z_RESVAL_P(zval)
Z_RESVAL_PP(zval)
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k at ailis dot de
06-Apr-2002 11:56 |
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If you are using one of the above macros you definitely want to use one of
those convert-functions if you are not sure what data type is stored in
the zval:
convert_to_string(zval_p)
convert_to_long(zval_p)
convert_to_double(zval_p)
convert_to_boolean(zval_p)
convert_to_array(zval_p)
convert_to_object(zval_p)
Otherwise you may get undefined results,
because Z_STRVAL_P(zval_p) returns nonsense if the zval contains not a
string. If you use convert_to_string() before, the value is converted to a
string and you can safely access it via the Z_STRVAL* macros.
There
are more useful convert-functions:
Resets the zval to NULL:
convert_to_null(zval_p)
Converts to a long by using a special
base:
convert_to_long_base(zval_p, base)
There are some more
functions which may be useful, but I don't know exactly what they are
doing. Just take a look at Zend/zend_operaters.h.
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PHP Manual
Extending PHP 4.0
Overview
API Macros
Reference: Some Configuration Macros