Export stdClass objects using (object) cast (fixes #48016)

Before this change, var_export()'s output for stdClass objects calls
the non-existent stdClass::__set_state method, and is ther

Export stdClass objects using (object) cast (fixes #48016)

Before this change, var_export()'s output for stdClass objects calls
the non-existent stdClass::__set_state method, and is therefore useless.

This commit makes var_export() output an (object) cast from an array
instead, which when evaluated, will produce a stdClass object. Other
classes see unchanged output.

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Replace legacy zval_dtor() by zval_ptr_dtor_nogc() or even more specialized destructors.
zval_dtor() doesn't make a lot of sense in PHP-7.* and it's used incorrectly in some places.
Its occur

Replace legacy zval_dtor() by zval_ptr_dtor_nogc() or even more specialized destructors.
zval_dtor() doesn't make a lot of sense in PHP-7.* and it's used incorrectly in some places.
Its occurances should be replaced by zval_ptr_dtor() or zval_ptr_dtor_nogc(), or even more specialized destructors.

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Changed php_add[c]slashes prototypes (removed should_free argument)

Removed useless zval_ptr_dtor()

Use zend_string_release_ex() instread of zend_string_release() in places, where we sure about string persistence.

year++

year++

Use cheaper functions

Fix unsigned comparisons and remove dead code

Fix unsigned comparison

Cleanup never executed block

Fix unsigned comparison

Fix unsigned comparison, diff can't be <

Fix unsigned comparisons and remove dead code

Fix unsigned comparison

Cleanup never executed block

Fix unsigned comparison

Fix unsigned comparison, diff can't be < 0

Fix unsigned comparison

Fix unsigned comparison

Remove dead code

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Missed change

Avoid unnecessary reference-counting on strings.

Use per-request heap instead of system one

Revert "Allow internal functions to return values by reference (this was disabled in implementation of DO_ICALL, but enabled in DO_FCALL)."

This reverts commit da781a5ac2cb9d2f983ef9fe070900

Revert "Allow internal functions to return values by reference (this was disabled in implementation of DO_ICALL, but enabled in DO_FCALL)."

This reverts commit da781a5ac2cb9d2f983ef9fe070900664db12c67.

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Allow internal functions to return values by reference (this was disabled in implementation of DO_ICALL, but enabled in DO_FCALL).
However, don't require internal functions returning by reference

Allow internal functions to return values by reference (this was disabled in implementation of DO_ICALL, but enabled in DO_FCALL).
However, don't require internal functions returning by reference to return a reference.
Mark unserialize() as returning by reference and remove unwrap_reference hack, to allow proper returning of self referenced arrays using a reference.
Currently unserialize() is the only internal function that may return a reference.

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Refactored recursion pretection

Avoid useless dereferences and separations during paramter passing.

Fix __sleep() returning undefined declared properties

Clean up __sleep() related code

Merge branch 'PHP-7.1'

Make unserialize() ref unwrapping compatible with 7.0

Also fix output difference in merged test (unrelated).

Update copyright headers to 2017

Update copyright headers to 2017

Fixed bug #73154

The object that is being serialized may be destroyed during the
execution of __sleep(), so operate on a copy instead.

Merge branch 'PHP-7.0' into PHP-7.1

Fixed bug #73154

The object that is being serialized may be destroyed during the
execution of __sleep(), so operate on a copy instead.