Is there garbage collection in PHP?

PhpMemory ManagementGarbage Collection

Php Problem Overview

I know that in PHP you don't have to free memory. Is it reached by garbage collector?

Php Solutions

Solution 1 - Php

Yes there is, here's a nice article describing its pitfalls. In PHP > 5.3.0, there is also the gc_enable function.

Solution 2 - Php

PHP has a combination of garbage collection and reference counting. The latter is the main mode of managing memory, with the garbage collector picking up the pieces that the ref counter misses (circular references). Before 5.3, php only had ref-counting, and even in 5.3 it's the still how memory will usually be freed.

Solution 3 - Php

Yes. There is also session cleanup done by the garbage collector.

Solution 4 - Php

since 5.3.0 there is garbage collection support. please check this very informative article from php.net http://php.net/manual/en/features.gc.php

Solution 5 - Php

Since 5.3.0 you can force garbage collection by using gc_collect_cycles function.

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