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php Programming Glossary: refcounthttp://stackoverflow.com/questions/10057671/how-foreach-actually-works how zvals work in PHP in particular you should know what a refcount is and what is_ref means. foreach works with all kinds of traversables.. it would break reference semantics. If the array has a refcount of 1 the copy will not be done either. refcount 1 means that.. has a refcount of 1 the copy will not be done either. refcount 1 means that the array isn't used anywhere else so foreach can..
In PHP can someone explain cloning vs pointer reference? http://stackoverflow.com/questions/3611986/in-php-can-someone-explain-cloning-vs-pointer-reference this reason the internal object representation contains a refcount Simply a count of the number of variables pointing to it . When.. the number of variables pointing to it . When an object's refcount drops to 0 meaning that all the variables pointing to it either..
How check memory location of variable in php? http://stackoverflow.com/questions/5153528/how-check-memory-location-of-variable-in-php by Derick Rethans on references in PHP. Watch out for the refcount when using debug_zval_dump because the function always creates..
Smarty (and other tpl ngins): assign and assign_by_ref http://stackoverflow.com/questions/5794746/smarty-and-other-tpl-ngins-assign-and-assign-by-ref precise both a and b will point to the same zval and it's refcount will be increased. Now if either a or b were modified the value.. to explain why a SOMETHING_BIG a points to a zval with refcount 1 and is_ref 0 b a a and b both point to a zval with refcount.. 1 and is_ref 0 b a a and b both point to a zval with refcount 2 and is_ref 0 c a Now we have a problem c can't just point..
int((0.1+0.7)*10) = 7 in several languages. How to prevent this? http://stackoverflow.com/questions/6439140/int0-10-710-7-in-several-languages-how-to-prevent-this internally as 8 debug_zval_dump 0.1 0.7 10 double 8 refcount 1 debug_zval_dump int 0.1 0.7 10 long 7 refcount 1 debug_zval_dump.. double 8 refcount 1 debug_zval_dump int 0.1 0.7 10 long 7 refcount 1 debug_zval_dump float 0.1 0.7 10 double 8 refcount 1 Python.. 7 refcount 1 debug_zval_dump float 0.1 0.7 10 double 8 refcount 1 Python 0.1 0.7 10 7.9999999999999991 int 0.1 0.7 10 7 Javascript..
Converting an array from one to multi-dimensional based on parent ID values http://stackoverflow.com/questions/7767961/converting-an-array-from-one-to-multi-dimensional-based-on-parent-id-values values in array aren't referenced any longer the value's refcount is reduced by one . If the temporary arrays are not unset after..
Why does PHP's foreach advance the pointer of its array (only) once? http://stackoverflow.com/questions/8263293/why-does-phps-foreach-advance-the-pointer-of-its-array-only-once Thanks @NickC for anyone else curious about zval and refcount you can read up on the basics here php share improve this.. . This means that no actual copy is done but only the refcount of the zval of array is increased to 2 . On the first iteration..
http://stackoverflow.com/questions/8787893/what-is-some-number-next-to-objectsomeclass-in-var-dump-of-an-object-i-ha for every object created gets decremented by 1 when a refcount of a zval reaches zero i.e. Garbage Collection. Am I right ..
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