PHP Memory Management - Variables within Loops

Question

Does PHP perform wise memory management in regards to variables within loops?

For example, would memory allocation be performed for the following example, beyond the first iteration?

foreach ($items as $item) { $item_found = true; }

Answer 1

Memory for variables $items, $item and $item_found will be allocated once (on first iteration only). By default, PHP allocates memory for variables if it encounters new ones.

Read about GC and this question: How does PHP assign and free memory for variables?. It should give you some information about PHP memory management. Also note that PHP uses "copy-on-write" scheme.