Fix GH-13817: Segmentation fault for enabled observers after pass 4

Instead of fixing up temporaries count in between observer steps, just apply the additional temporary in the two affected

Fix GH-13817: Segmentation fault for enabled observers after pass 4

Instead of fixing up temporaries count in between observer steps, just apply the additional temporary in the two affected observer steps.

Closes GH-14018.

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Remove separate valid_T set

Rather than keeping track of a separate valid_T set (which must
always be in sync with map_T), use a dummy value in map_T to
denote unallocated temporarie

Remove separate valid_T set

Rather than keeping track of a separate valid_T set (which must
always be in sync with map_T), use a dummy value in map_T to
denote unallocated temporaries.

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Remove unused temporaries from taken map

If the result has no uses we need to allocate it when visiting the
defining instruction. However, we should still go through the
logic to rem

Remove unused temporaries from taken map

If the result has no uses we need to allocate it when visiting the
defining instruction. However, we should still go through the
logic to remove the temporary from the taken map afterwards,
as the temporary can still be reused prior to the defining
instruction.

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Use more appropriate types in Optimizer

Mainly using zend_result and bool instead of int

Fixed some spaces used instead of tabs

Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as

Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as 3.0 states "php 5.1.1, 4.1.1, and earlier".
3. In some license comments is "at through the world-wide-web" while most is without "at", so deleted.
4. fixed indentation in some files before |

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Remove unnecessary php.h includes from Zend/

The Zend/ directory really shouldn't be including php headers.
These particular includes are plain unnecessary.

Move optimizer into core

This only moves the files, adjusts the build system, exports APIs
and does minor fixups to make sure the code builds.

This does not yet try to make the

Move optimizer into core

This only moves the files, adjusts the build system, exports APIs
and does minor fixups to make sure the code builds.

This does not yet try to make the optimizer usable independently
of opcache.

Closes GH-6642.

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