ext/curl: Bump minimum Curl version to >= 7.61.0 (#13259)

Bumps the minimum required libcurl version to 7.61.0.

Please also see #4917, which bumped minimum libcurl version to the cu

ext/curl: Bump minimum Curl version to >= 7.61.0 (#13259)

Bumps the minimum required libcurl version to 7.61.0.

Please also see #4917, which bumped minimum libcurl version to the current >= 7.29.0.
This bumps the minimum requirement to Curl 7.61.0 (released 2018 Sept).

Ubuntu, Debian, RHEL, and RHEL derivatives have major and LTS version bumps this year. Following are the
libcurl-dev/libcurl-devel versions available in the oldest supported (LTS or otherwise) in major OSs.

- Debian buster: [7.64](https://packages.debian.org/buster/libcurl4-openssl-dev)
- Ubuntu 20.04: [7.68](https://packages.ubuntu.com/focal/libcurl-dev)
- CentOS/RHEL 7: 7.29
- RHEL 8/Rocky 8/EL 8: 7.61
- Fedora 38: 7.87

RHEL/CentOS 7 reaches EOL mid 2024, so for PHP 8.4 scheduled towards the end of this year, we can safely
bump the minimum libcurl version.

7.61.0 was selected as the new minimum because RHEL and derivatives have libcurl-devel version 7.61. RHEL 8 is
a current and supported RHEL version.

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Add new curl constants from curl until (including) 7.87 (#10459)

Fixes GH-10454

Convert return type of various object handlers from int to zend_result (#8755)

Introduce CURLOPT_XFERINFOFUNCTION

`CURLOPT_XFERINFOFUNCTION` is available as of cURL 7.32.0, and
supersedes `CURLOPT_PROGRESSFUNCTION` which is still supported by
latest cURL, thoug

Introduce CURLOPT_XFERINFOFUNCTION

`CURLOPT_XFERINFOFUNCTION` is available as of cURL 7.32.0, and
supersedes `CURLOPT_PROGRESSFUNCTION` which is still supported by
latest cURL, though.

Closes GH-7823.

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Use more specific types instead of int in cURL extension

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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cURL: make possible to send file from buffer string

Add CURLStringFile class which works similarly to CURLFile, but
uploads a file from a string rather than a file. This avoids the
n

cURL: make possible to send file from buffer string

Add CURLStringFile class which works similarly to CURLFile, but
uploads a file from a string rather than a file. This avoids the
need to create a temporary file, or use of a data:// stream.

Basic usage:

$file = new CURLStringFile($data, 'filename.txt', 'text/plain');
curl_setopt($curl, CURLOPT_POSTFIELDS, ['file' => $file]);

Closes GH-6456.

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Generate class entries for a few extensions

Relates to GH-6644

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool is retained as an alias.

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Manually store CURLOPT_PRIVATE data

This is simpler than going through curl, because we can manage
the memory more easily (in particular, this removes the need for
to_free->str). Add

Manually store CURLOPT_PRIVATE data

This is simpler than going through curl, because we can manage
the memory more easily (in particular, this removes the need for
to_free->str). Additionally this allows the CURLOPT_PRIVATE data
to have any type, instead of being implicitly cast to string.

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Remove method member from php_curl_callback

For these callbacks a non-null callback already indicates that
a user callback should be used. We don't need an additional
member to tell

Remove method member from php_curl_callback

For these callbacks a non-null callback already indicates that
a user callback should be used. We don't need an additional
member to tell us the same thing.

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Remove unused still_running member

Don't allocate php_curl_handlers separately

Always allocated together with php_curl... no point in that.

Don't allocate php_curlm_handlers separately

This is always allocated together with the php_curlm structure,
there's no point in making it a separate allocation.

Use single typedef for curl callbacks

There's no value in making these separate types.

Retain reference to share handle from curl handle

Not keeping a reference will not result in use after free, because
curl protects against it, but it will result in a memory leak,
be

Retain reference to share handle from curl handle

Not keeping a reference will not result in use after free, because
curl protects against it, but it will result in a memory leak,
because curl_share_cleanup() will fail. We should make sure that
the share handle object stays alive as long as the curl handles
use it.

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Private/public split curl header

To allow exporting the php_curl.h header containing curl class
entries, split off a separate curl_private.h header with all the
implementation detail

Private/public split curl header

To allow exporting the php_curl.h header containing curl class
entries, split off a separate curl_private.h header with all the
implementation details.

We may move or expose additional APIs in php_curl.h on an as-needed
basis.

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