Rename locale_string to ctype_string

To make it more obvious that this only refers to the LC_CTYPE
locale.

Add zend_string_concat2 API

Generate function entries for another batch of extensions

Closes GH-5352

Improve error messages of various extensions

Closes GH-5278

Add preg_last_error_msg() function

Provides the last PCRE error as a human-readable message, similar
to functionality existing in other extensions, such as
json_last_error_msg().

Add preg_last_error_msg() function

Provides the last PCRE error as a human-readable message, similar
to functionality existing in other extensions, such as
json_last_error_msg().

Closes GH-5185.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed bug #79257

Fixed bug #79257

Replace an existing entry for a given name only if we have a match.

Merge branch 'PHP-7.4'

* PHP-7.4:
PCRE: Only remember valid UTF-8 if start offset zero
PCRE: Check whether start offset is on char boundary

PCRE: Only remember valid UTF-8 if start offset zero

PCRE only validates the string starting from the start offset
(minus maximum look-behind, but let's ignore that), so we can
only

PCRE: Only remember valid UTF-8 if start offset zero

PCRE only validates the string starting from the start offset
(minus maximum look-behind, but let's ignore that), so we can
only remember that the string is fully valid UTF-8 is the original
start offset is zero.

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PCRE: Check whether start offset is on char boundary

We need not just the whole string to be UTF-8, but the start
position to be on a character boundary as well. Check this by
lookin

PCRE: Check whether start offset is on char boundary

We need not just the whole string to be UTF-8, but the start
position to be on a character boundary as well. Check this by
looking for a continuation byte.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed bug #79188

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fixed bug #79188

Fixed bug #79188

Use RETURN_THROWS() after zend_type_error()

Merge branch 'PHP-7.4'

* PHP-7.4:
Fix #78853: preg_match() may return integer > 1

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix #78853: preg_match() may return integer > 1

Fix #78853: preg_match() may return integer > 1

Commit 54ebebd[1] optimized the match loop, but for this case it has
been overlooked, that we must only loop if we're doing global matchin

Fix #78853: preg_match() may return integer > 1

Commit 54ebebd[1] optimized the match loop, but for this case it has
been overlooked, that we must only loop if we're doing global matching.

[1] <http://git.php.net/?p=php-src.git;a=commit;h=54ebebd686255c5f124af718c966edb392782d4a>

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Merge branch 'PHP-7.4'

* PHP-7.4:
Fix php_pcre_mutex_free()

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix php_pcre_mutex_free()

Fix php_pcre_mutex_free()

We should only set the mutex to NULL if we actually freed it.
Due to missing braces non-main threads may currently set it to
NULL first.

Merge branch 'PHP-7.4'

Merge branch 'PHP-7.3' into PHP-7.4

Merge branch 'PHP-7.2' into PHP-7.3

Add pcre_get_compiled_regex_cache_ex() with local_aware flag

A new function `pcre_get_compiled_regex_cache_ex()` is introduced,
which allows to compile regexp pattern using the "C" local

Add pcre_get_compiled_regex_cache_ex() with local_aware flag

A new function `pcre_get_compiled_regex_cache_ex()` is introduced,
which allows to compile regexp pattern using the "C" locale instead
of a current locale.

This will be needed to replace setlocale() usage in fileinfo,
which is not thread-safe.

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Remove most uses of ZEND_PARSE_PARAMETERS_END_EX()

As ZPP now throws, it makes no sense to specify an explicit return
value.