Disable PEAR by default

Installation of PEAR can be enabled using --with-pear, but will
through a deprecation warning during ./configure.

Return empty str from quotemeta() on empty str

Improve UPGRADING note

[ci skip]

[ci skip] Update changelog

Fix variadic arginfos for Reflection functions

Fix arginfos of required arguments for some Reflection methods

Implement the negative_array_index RFC

Fix SplHeap::compare arginfo and tests

[ci skip] Move OPcache configure option changes

Remove $errcontext argument to error handlers

I'm removing the argument entirely here, but we might want to change
this to passing null or and empty array instead, if the impact of
d

Remove $errcontext argument to error handlers

I'm removing the argument entirely here, but we might want to change
this to passing null or and empty array instead, if the impact of
dropping it entirely turns out to be too large.

This was deprecated as part of https://wiki.php.net/rfc/deprecations_php_7_2
as a doc-only deprecation.

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Removed ldap_sort and LDAP_DEPRECATED build flag

ldap_sort was deprecated in PHP7, it is now removed.
This allows removing the LDAP_DEPRECATED flag when building against
openldap.

Mark ldap_control_paged_result and ldap_control_paged_result_response as deprecated

These functions have serious limitations and may confuse users.
Same operations can be done using the

Mark ldap_control_paged_result and ldap_control_paged_result_response as deprecated

These functions have serious limitations and may confuse users.
Same operations can be done using the new ldap control system in search
operations.

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Make mb_ereg_replace() pattern argument a string

Deprecate mb_ereg_replace with non-string pattern

I'm counting this towards the non-string needle deprecation from
https://wiki.php.net/rfc/deprecations_php_7_3. I wasn't aware that

Deprecate mb_ereg_replace with non-string pattern

I'm counting this towards the non-string needle deprecation from
https://wiki.php.net/rfc/deprecations_php_7_3. I wasn't aware that
mb_ereg_replace() is also affected by this issue. It's even more
ridiculous than usual here, because the integer is interpreted as
an ASCII codepoint, even though these are supposed to be multibyte
functions :(

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Remove bareword fallback for constants

Access to undefined constants will now always result in an Error
exception being thrown.

This required quite a few test changes, because t

Remove bareword fallback for constants

Access to undefined constants will now always result in an Error
exception being thrown.

This required quite a few test changes, because there were many
buggy tests that unintentionally used bareword fallback in combination
with error suppression.

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Revert "Don't silence fatal errors with @"

This reverts commit abd36289e26cc0365e82373699aba4c1ffff464d.

This wasn't ready for merging yet, there are still some test
failures.

Don't silence fatal errors with @

Remove -1 crop mode

Remove intl Normalizer::NONE

Remove support for __autoload()

There are probably some improvements we can do to the SPL
implementation now that __autoload() is gone. In particular having
EG(autoload_func) as a pr

Remove support for __autoload()

There are probably some improvements we can do to the SPL
implementation now that __autoload() is gone. In particular having
EG(autoload_func) as a property zend function, rather than a simple
callback probably doesn't make sense.

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Removed read_exif_data() alias

Require at least one arg for mktime/gmmktime

Remove ability to specify 'salt' in password_hash()

Remove static calls to non-static methods

Forbid unbinding $this from methods

Remove ability to declare userland case-insensitive constants

This is part of https://wiki.php.net/rfc/case_insensitive_constant_deprecation.

This commit only removes the ability to

Remove ability to declare userland case-insensitive constants

This is part of https://wiki.php.net/rfc/case_insensitive_constant_deprecation.

This commit only removes the ability to declare such constants from
userland. Before the functionality can be removed entirely, it's
necessary to figure out the handling of true/false/null first.

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